adding conductorssensor using the mbientlab metaboard r+

2018-05-18 22:07:42 +02:00
parent 85ea37c14b
commit 38c39a045c
56 changed files with 2963 additions and 6 deletions
--- a/android/ConductorsPhone/app/build.gradle
+++ b/android/ConductorsPhone/app/build.gradle
@@ -11,8 +11,8 @@ android {
        minSdkVersion 24
        targetSdkVersion 26
        //sdk 2 | product version 3 | build num 2 | multi-apk 2
-        versionCode 260130300
-        versionName "0.1.3.2"
+        versionCode 260130400
+        versionName "0.1.3.3"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
--- a/android/ConductorsSensor/.gitignore
+++ b/android/ConductorsSensor/.gitignore
@@ -0,0 +1,10 @@
+*.iml
+.gradle
+/local.properties
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
--- a/android/ConductorsSensor/app/.gitignore
+++ b/android/ConductorsSensor/app/.gitignore
@@ -0,0 +1 @@
+/build
--- a/android/ConductorsSensor/app/build.gradle
+++ b/android/ConductorsSensor/app/build.gradle
@@ -0,0 +1,38 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 26
+    defaultConfig {
+        applicationId "de.tonifetzer.conductorssensor"
+        minSdkVersion 21
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    buildToolsVersion '27.0.3'
+}
+
+dependencies {
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    api 'com.mbientlab:metawear:3.4.0'
+    implementation 'com.android.support:preference-v7:26.1.0'
+    implementation 'com.android.support:preference-v14:26.1.0'
+    compile 'com.github.wendykierp:JTransforms:3.1'
+}
--- a/android/ConductorsSensor/app/proguard-rules.pro
+++ b/android/ConductorsSensor/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
--- a/android/ConductorsSensor/app/src/androidTest/java/de/tonifetzer/conductorssensor/ExampleInstrumentedTest.java
+++ b/android/ConductorsSensor/app/src/androidTest/java/de/tonifetzer/conductorssensor/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package de.tonifetzer.conductorssensor;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("de.tonifetzer.conductorssensor", appContext.getPackageName());
+    }
+}
--- a/android/ConductorsSensor/app/src/main/AndroidManifest.xml
+++ b/android/ConductorsSensor/app/src/main/AndroidManifest.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.tonifetzer.conductorssensor">
+
+    <uses-permission android:name="android.permission.BLUETOOTH"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:configChanges="orientation|screenSize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service android:name="com.mbientlab.metawear.android.BtleService" />
+
+    </application>
+
+</manifest>
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/MainActivity.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/MainActivity.java
@@ -0,0 +1,155 @@
+package de.tonifetzer.conductorssensor;
+
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentActivity;
+import android.support.v4.app.FragmentTransaction;
+import android.os.Bundle;
+import android.support.v7.widget.PopupMenu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.CompoundButton;
+import android.widget.Toast;
+import android.widget.ToggleButton;
+
+import java.util.Stack;
+
+import de.tonifetzer.conductorssensor.estimation.Estimator;
+import de.tonifetzer.conductorssensor.sensor.ConnectFragment;
+import de.tonifetzer.conductorssensor.settings.SettingsFragment;
+
+public class MainActivity extends FragmentActivity implements PopupMenu.OnMenuItemClickListener, ToggleButton.OnCheckedChangeListener{
+
+    ConnectFragment mConnectFragment;
+    Stack<String> mFragmentStack;
+    ToggleButton mStartStopToggle;
+
+    Estimator mEstimator;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // register listener for start stop btn
+        mStartStopToggle= (ToggleButton) findViewById(R.id.startBtn);
+        mStartStopToggle.setOnCheckedChangeListener(this);
+
+        // ensures the connection to the bt sensor board
+        mConnectFragment = new ConnectFragment();
+        mFragmentStack = new Stack<>();
+    }
+
+    @Override
+    public void onBackPressed() {
+
+        FragmentTransaction t = getSupportFragmentManager().beginTransaction();
+        if(!mFragmentStack.empty()){
+            // hide current top, and pop it
+            String top = mFragmentStack.pop();
+            t.hide(getSupportFragmentManager().findFragmentByTag(top));
+
+            if(!mFragmentStack.empty()){
+                //open new top of stack
+                top = mFragmentStack.peek();
+                t.show(getSupportFragmentManager().findFragmentByTag(top));
+            } else{
+                // if its now empty activate our mainView
+                findViewById(R.id.bpmContent).setVisibility(View.VISIBLE);
+                findViewById(R.id.backBtn).setVisibility(View.INVISIBLE);
+            }
+
+            t.commit();
+
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+    public void onBackPressed(View v){
+        onBackPressed();
+    }
+
+    public void openFragment(Fragment aFragment, String tag){
+
+        FragmentTransaction t = getSupportFragmentManager().beginTransaction();
+
+        if(!mFragmentStack.empty()){
+            if(mFragmentStack.peek().equals(tag)){
+                // if fragment is already open, do nothing
+                return;
+            } else {
+                //hide to current top
+                String top = mFragmentStack.peek();
+                t.hide(getSupportFragmentManager().findFragmentByTag(top));
+            }
+        } else {
+            //disable mainView items
+            findViewById(R.id.bpmContent).setVisibility(View.INVISIBLE);
+            findViewById(R.id.backBtn).setVisibility(View.VISIBLE);
+        }
+
+        if (getSupportFragmentManager().findFragmentByTag(tag) == null) {
+            t.add(R.id.mainContent, aFragment, tag);
+        } else {
+            t.show(getSupportFragmentManager().findFragmentByTag(tag));
+        }
+
+        mFragmentStack.push(tag);
+        t.commit();
+    }
+
+    public void showPopup(View v) {
+        PopupMenu popup = new PopupMenu(this, v);
+        MenuInflater inflater = popup.getMenuInflater();
+        inflater.inflate(R.menu.settings, popup.getMenu());
+
+        popup.setOnMenuItemClickListener(this);
+        popup.show();
+
+    }
+
+    @Override
+    public boolean onMenuItemClick(MenuItem item) {
+
+        switch (item.getItemId()) {
+            case R.id.action_bluetooth:
+                openFragment(mConnectFragment, "Connect");
+                break;
+            case R.id.action_settings:
+                openFragment(new SettingsFragment(), "Settings");
+                break;
+        }
+        return false;
+    }
+
+    @Override
+    public void finish() {
+        //super.finish();
+        moveTaskToBack(true);
+    }
+
+
+    @Override
+    public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
+
+        if (isChecked) {
+            if(mConnectFragment.getSensorBoard() != null && mConnectFragment.getSensorBoard().isConnected()){
+                mConnectFragment.getSensorBoard().startAccelerometer();
+
+                //todo: estimator classe mit start und stop funktion. board bei start durchreichen.
+
+            } else {
+                Toast.makeText(this, "Please connect a sensor!", Toast.LENGTH_SHORT).show();
+                mStartStopToggle.setChecked(false);
+            }
+
+        } else {
+            if(mConnectFragment.getSensorBoard() != null){
+                mConnectFragment.getSensorBoard().stopAccelerometer();
+            }
+
+        }
+
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerData.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerData.java
@@ -0,0 +1,35 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+public class AccelerometerData {
+
+    public double x,y,z;
+    public long ts;
+
+    public AccelerometerData(long ts, double x, double y, double z){
+        this.ts = ts;
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public AccelerometerData(AccelerometerData other){
+        this.ts = other.ts;
+        this.x = other.x;
+        this.y = other.y;
+        this.z = other.z;
+    }
+
+    @Override
+    public boolean equals(Object other){
+
+        if (this == other)
+            return true;
+
+        if (!(other instanceof AccelerometerData)) {
+            return false;
+        }
+
+        AccelerometerData ad = (AccelerometerData) other;
+        return ts == ad.ts;
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerInterpolator.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerInterpolator.java
@@ -0,0 +1,105 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+import java.util.Arrays;
+
+public class AccelerometerInterpolator {
+
+    private double[] mX;
+    private double[] mY;
+    private double[] mZ;
+    private long[] mTsInterp;
+
+    public AccelerometerInterpolator(AccelerometerWindowBuffer ab, double sampleRate_ms){
+
+        long size = (ab.getYongest().ts - (ab.getOldest().ts - (long) sampleRate_ms)) / (long) sampleRate_ms;
+        mTsInterp = new long[(int)size];
+        int j = 0;
+        for(long i = ab.getOldest().ts; i <= ab.getYongest().ts; i += sampleRate_ms){
+            mTsInterp[j++] = i;
+        }
+
+        mX = interpLinear(ab.getTs(), ab.getX(), mTsInterp);
+        mY = interpLinear(ab.getTs(), ab.getY(), mTsInterp);
+        mZ = interpLinear(ab.getTs(), ab.getZ(), mTsInterp);
+    }
+
+    public long[] getTs(){
+        return mTsInterp;
+    }
+
+    public double[] getX(){
+        return mX;
+    }
+
+    public double[] getY(){
+        return mY;
+    }
+
+    public double[] getZ(){
+        return mZ;
+    }
+
+    private static double[] interpLinear(double[] x, double[] y, double[] xi) throws IllegalArgumentException {
+        if (x.length != y.length) {
+            throw new IllegalArgumentException("X and Y must be the same length");
+        }
+        if (x.length == 1) {
+            throw new IllegalArgumentException("X must contain more than one value");
+        }
+        double[] dx = new double[x.length - 1];
+        double[] dy = new double[x.length - 1];
+        double[] slope = new double[x.length - 1];
+        double[] intercept = new double[x.length - 1];
+
+        // Calculate the line equation (i.e. slope and intercept) between each point
+        for (int i = 0; i < x.length - 1; i++) {
+            dx[i] = x[i + 1] - x[i];
+            if (dx[i] == 0) {
+                throw new IllegalArgumentException("X must be montotonic. A duplicate " + "x-value was found");
+            }
+            if (dx[i] < 0) {
+                throw new IllegalArgumentException("X must be sorted");
+            }
+            dy[i] = y[i + 1] - y[i];
+            slope[i] = dy[i] / dx[i];
+            intercept[i] = y[i] - x[i] * slope[i];
+        }
+
+        // Perform the interpolation here
+        double[] yi = new double[xi.length];
+        for (int i = 0; i < xi.length; i++) {
+            if ((xi[i] > x[x.length - 1]) || (xi[i] < x[0])) {
+                yi[i] = Double.NaN;
+            }
+            else {
+                int loc = Arrays.binarySearch(x, xi[i]);
+                if (loc < -1) {
+                    loc = -loc - 2;
+                    yi[i] = slope[loc] * xi[i] + intercept[loc];
+                }
+                else {
+                    yi[i] = y[loc];
+                }
+            }
+        }
+
+        return yi;
+    }
+
+    private static double[] interpLinear(long[] x, double[] y, long[] xi) throws IllegalArgumentException {
+
+        double[] xd = new double[x.length];
+        for (int i = 0; i < x.length; i++) {
+            xd[i] = x[i];
+        }
+
+        double[] xid = new double[xi.length];
+        for (int i = 0; i < xi.length; i++) {
+            xid[i] = xi[i];
+        }
+
+        return interpLinear(xd, y, xid);
+    }
+
+
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerWindowBuffer.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AccelerometerWindowBuffer.java
@@ -0,0 +1,148 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+import java.util.ArrayList;
+
+/**
+ * Created by toni on 15/12/17.
+ */
+public class AccelerometerWindowBuffer extends ArrayList<AccelerometerData> {
+
+    private int mWindowSize;
+    private int mOverlapSize;
+    private int mOverlapCounter;
+
+    public AccelerometerWindowBuffer(int windowSize_ms, int overlap_ms) {
+        mWindowSize = windowSize_ms;
+        mOverlapSize = overlap_ms;
+        mOverlapCounter = 0;
+    }
+
+    //TODO: add exception handling. falseArgument if ad has no numeric x,y,z
+    public boolean add(AccelerometerData ad) {
+        synchronized (this) {
+
+            //do not add duplicates!
+            if (!isEmpty() && getYongest().equals(ad)) {
+                return false;
+            }
+
+            // current - last to increment overlap time
+            if (!isEmpty()) {
+                mOverlapCounter += ad.ts - getYongest().ts;
+            }
+
+            //add element
+            boolean r = super.add(ad);
+            removeOldElements();
+
+            return r;
+        }
+    }
+
+    private void removeOldElements() {
+        synchronized (this) {
+            if (!isEmpty()) {
+                if ((getYongest().ts - getOldest().ts) > mWindowSize) {
+
+                    long oldestTime = getYongest().ts - mWindowSize;
+                    for (int i = 0; i < size(); ++i) {
+                        if (get(i).ts > oldestTime) {
+                            break;
+                        }
+                        super.remove(i);
+                    }
+                }
+            }
+        }
+    }
+
+    public boolean isNextWindowReady(long lastWindowTS, int overlapSize) {
+        return true;
+    }
+
+    public boolean isNextWindowReady() {
+
+        if (!isEmpty()) {
+            if (((getYongest().ts - getOldest().ts) > mWindowSize / 4) && mOverlapCounter > mOverlapSize) {
+                mOverlapCounter = 0;
+
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public AccelerometerWindowBuffer getFixedSizedWindow(int size, int overlap) {
+        AccelerometerWindowBuffer other = new AccelerometerWindowBuffer(size, overlap);
+
+        double sampleRate = ((getYongest().ts - getOldest().ts) / super.size());
+
+        //if current size is smaller then wanted size, start at 0 and provide smaller list
+        int start = 0;
+        if ((getYongest().ts - getOldest().ts) > size) {
+            start = (int) Math.round(super.size() - (size / sampleRate));
+        }
+
+        // start should not be negative, this can happen due to rounding errors.
+        start = start < 0 ? 0 : start;
+
+        synchronized (this) {
+            other.addAll(super.subList(start, super.size()));
+        }
+
+        return other;
+    }
+
+    public AccelerometerWindowBuffer getFixedSizedWindow() {
+        return getFixedSizedWindow(mWindowSize, mOverlapSize);
+    }
+
+    //TODO: check if list is empty! this causes indexoutofbounce
+    public AccelerometerData getYongest() {
+        synchronized (this) {
+            return super.get(size() - 1);
+        }
+    }
+
+    public AccelerometerData getOldest() {
+        return super.get(0);
+    }
+
+    public double[] getX() {
+        return this.stream().mapToDouble(d -> d.x).toArray();
+    }
+
+    public double[] getY() {
+        return this.stream().mapToDouble(d -> d.y).toArray();
+    }
+
+    public double[] getZ() {
+        return this.stream().mapToDouble(d -> d.z).toArray();
+    }
+
+    public long[] getTs() {
+        return this.stream().mapToLong(d -> d.ts).toArray();
+    }
+
+    public int getOverlapSize() {
+        return mOverlapSize;
+    }
+
+    public void setWindowSize(int size_ms) {
+        this.mWindowSize = size_ms;
+        removeOldElements(); // need to call this here, to remove too old elements, if the windowSize gets smaller.
+    }
+
+    public void setOverlapSize(int size_ms) {
+        this.mOverlapSize = size_ms;
+        this.mOverlapCounter = 0;
+    }
+
+    @Override
+    public void clear() {
+        synchronized (this) {
+            super.clear();
+            this.mOverlapCounter = 0;
+        }
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AutoCorrelation.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/AutoCorrelation.java
@@ -0,0 +1,80 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+
+import org.jtransforms.fft.DoubleFFT_1D;
+import de.tonifetzer.conductorssensor.utilities.Utils;
+import java.util.Arrays;
+
+/**
+ * Created by toni on 15/12/17.
+ */
+public class AutoCorrelation {
+
+    private int mMaxLag;
+    private double[] mCorr;
+
+    public AutoCorrelation(double[] data, int maxLag){
+
+        mMaxLag = maxLag;
+        mCorr = fft(data);
+    }
+
+    public double[] getCorr(){
+        return mCorr;
+    }
+
+    private double[] fft(double[] data) {
+
+        if(mMaxLag < 1){
+            throw new RuntimeException("maxlag has to be greater 1");
+        }
+
+        int n = data.length;
+        double[] x = Arrays.copyOf(data, n);
+        int mxl = Math.min(mMaxLag, n - 1);
+        int ceilLog2 = Utils.nextPow2(2*n -1);
+        int n2 = (int) Math.pow(2,ceilLog2);
+
+        // x - mean(x) (pointwise)
+        double x_mean = Utils.mean(x);
+        for(int i = 0; i < x.length; ++i){
+            x[i] -= x_mean;
+        }
+
+        // double the size of x and fill up with zeros. if x is not even, add additional 0
+        double[] x2 = new double[n2 * 2]; //need double the size for fft.realForwardFull (look into method description)
+        Arrays.fill(x2, 0);
+        System.arraycopy(x,0, x2, 0, x.length);
+
+        // x_fft calculate fft 1D
+        DoubleFFT_1D fft = new DoubleFFT_1D(n2);
+        fft.realForwardFull(x2);
+
+        // Cr = abs(x_fft).^2 (absolute with complex numbers is (r^2) + (i^2)
+        double[] Cr = new double[n2 * 2];
+        int j = 0;
+        for(int i = 0; i < x2.length; ++i){
+            Cr[j++] = Utils.sqr(x2[i]) + Utils.sqr(x2[i+1]);
+            ++i;  //skip the complex part
+        }
+
+        // ifft(Cr,[],1)
+        DoubleFFT_1D ifft = new DoubleFFT_1D(n2);
+        ifft.realInverseFull(Cr, true);
+
+        // remove complex part and scale/normalize
+        double[] c1 = new double[n2];
+        j = 0;
+        for(int i = 0; i < Cr.length; ++i){
+            c1[j++] = Cr[i] / Cr[0];
+            ++i;  //skip the complex part
+        }
+
+        // Keep only the lags we want and move negative lags before positive lags.
+        double[] c = new double[(mxl * 2) + 1];
+        System.arraycopy(c1, 0, c, mxl, mxl + 1); // +1 to place the 1.0 in the middle of correlation
+        System.arraycopy(c1, n2 - mxl, c, 0, mxl);
+
+        return c;
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/BpmEstimator.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/BpmEstimator.java
@@ -0,0 +1,213 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+import de.tonifetzer.conductorssensor.utilities.MovingFilter;
+import de.tonifetzer.conductorssensor.utilities.SimpleKalman;
+import de.tonifetzer.conductorssensor.utilities.Utils;
+
+import java.util.LinkedList;
+
+
+/**
+ * Created by toni on 17/12/17.
+ */
+public class BpmEstimator {
+
+    private AccelerometerWindowBuffer mBuffer;
+    private double mSampleRate_ms;
+
+    private LinkedList<Double> mBpmHistory_X;
+    private LinkedList<Double> mBpmHistory_Y;
+    private LinkedList<Double> mBpmHistory_Z;
+
+    private LinkedList<Double> mBpmHistory;
+    private int mResetCounter;
+    private int mResetLimit_ms;
+
+    private MovingFilter mMvg;
+    //private SimpleKalman mKalman;
+
+
+    public BpmEstimator(AccelerometerWindowBuffer windowBuffer, double sampleRate_ms, int resetAfter_ms){
+        mBuffer = windowBuffer;
+        mSampleRate_ms = sampleRate_ms;
+
+        mBpmHistory_X = new LinkedList<>();
+        mBpmHistory_Y = new LinkedList<>();
+        mBpmHistory_Z = new LinkedList<>();
+
+        mBpmHistory = new LinkedList<>();
+        mResetCounter = 0;
+        mResetLimit_ms = resetAfter_ms;
+
+
+        //TODO: this is to easy. since the new dyn. windowsize produces smaller update times, we need to consider something, that
+        //TODO: holds more values, if they are similar, an resets the history if not.
+        mMvg = new MovingFilter(2);
+        //mKalman = new SimpleKalman();
+    }
+
+    //TODO: we use the buffer from outside.. this buffer is continuously updated.. not good!
+    public double estimate(AccelerometerWindowBuffer fixedWindow){
+
+        double sampleRate = mSampleRate_ms;
+        if(sampleRate <= 0){
+            sampleRate = Math.round(Utils.mean(Utils.diff(fixedWindow.getTs())));
+        }
+
+        if(sampleRate == 0){
+            int breakhere = 0;
+        }
+
+        AccelerometerInterpolator interp = new AccelerometerInterpolator(fixedWindow, sampleRate);
+
+        //are we conducting?
+        //just look at the newest 512 samples
+        //List<AccelerometerData> subBuffer =  mBuffer.subList(mBuffer.size() - 512, mBuffer.size());
+
+        double[] xAutoCorr = new AutoCorrelation(interp.getX(), fixedWindow.size()).getCorr();
+        double[] yAutoCorr = new AutoCorrelation(interp.getY(), fixedWindow.size()).getCorr();
+        double[] zAutoCorr = new AutoCorrelation(interp.getZ(), fixedWindow.size()).getCorr();
+
+
+        //find a peak within range of 250 ms
+        int peakWidth = (int) Math.round(250 / sampleRate);
+        Peaks pX = new Peaks(xAutoCorr, peakWidth, 0.1f, 0, false);
+        Peaks pY = new Peaks(yAutoCorr, peakWidth, 0.1f, 0, false);
+        Peaks pZ = new Peaks(zAutoCorr, peakWidth, 0.1f, 0, false);
+
+        mBpmHistory_X.add(pX.getBPM(sampleRate));
+        mBpmHistory_Y.add(pY.getBPM(sampleRate));
+        mBpmHistory_Z.add(pZ.getBPM(sampleRate));
+
+        double estimatedBPM = getBestBpmEstimation(pX, pY, pZ);
+        if(estimatedBPM != -1){
+
+            //moving avg (lohnt dann, wenn wir viele daten haben)
+            mMvg.add(estimatedBPM);
+            mBpmHistory.add(mMvg.getAverage());
+
+            //mBpmHistory.add(estimatedBPM);
+
+            //moving median (lohnt nur bei konstantem tempo, da wir nur ein tempo damit gut halten können.)
+            //mMvg.add(estimatedBPM);
+            //mBpmHistory.add(mMvg.getMedian());
+
+            //kalman filter (lohnt dann, wenn wir konstantes tempo haben, mit startangabe!)
+
+            //standard last element
+            //mBpmHistory.add(estimatedBPM);
+            //mResetCounter = 0;
+        }
+        else {
+            int resetAfter = (int) Math.round(mResetLimit_ms / (mBuffer.getOverlapSize()));
+            if(++mResetCounter > resetAfter){
+                mBpmHistory.clear();
+
+                //TODO: send signal to clear.
+                //mBuffer.clear();
+                mMvg.clear();
+                mResetCounter = 0;
+            }
+            return -1;
+        }
+
+        //last element
+        return mBpmHistory.getLast();
+    }
+
+    public double getMeanBpm(){
+        return Utils.mean(mBpmHistory);
+    }
+
+    public double getMedianBPM(){
+        return Utils.median(mBpmHistory);
+    }
+
+    private double getBestBpmEstimation(Peaks peaksX, Peaks peaksY, Peaks peaksZ) throws IllegalArgumentException {
+
+        int cntNumAxis = 0;
+        double sumCorr = 0; //to prevent division by zero
+        double sumRms = 0;
+        double sumNumInter = 0;
+
+        double corrMeanX = 0, corrRmsX = 0;
+        int corrNumInterX = 0;
+        if(peaksX.hasPeaks()){
+            corrMeanX = Utils.geometricMean(peaksX.getPeaksValueWithoutZeroIdxAndNegativeValues());
+            corrRmsX = Utils.rms(peaksX.getPeaksValueWithoutZeroIdx());
+            corrNumInterX = Utils.intersectionNumber(peaksX.getData(), 0.2f);
+
+            ++cntNumAxis;
+            sumCorr += corrMeanX;
+            sumRms += corrRmsX;
+            sumNumInter += corrNumInterX;
+        }
+
+        double corrMeanY = 0, corrRmsY = 0;
+        int corrNumInterY = 0;
+        if(peaksY.hasPeaks()){
+            corrMeanY = Utils.geometricMean(peaksY.getPeaksValueWithoutZeroIdxAndNegativeValues());
+            corrRmsY = Utils.rms(peaksY.getPeaksValueWithoutZeroIdx());
+            corrNumInterY = Utils.intersectionNumber(peaksY.getData(), 0.2f);
+
+            ++cntNumAxis;
+            sumCorr += corrMeanY;
+            sumRms += corrRmsY;
+            sumNumInter += corrNumInterY;
+        }
+
+        double corrMeanZ = 0, corrRmsZ = 0;
+        int corrNumInterZ = 0;
+        if(peaksZ.hasPeaks()){
+            corrMeanZ = Utils.geometricMean(peaksZ.getPeaksValueWithoutZeroIdxAndNegativeValues());
+            corrRmsZ = Utils.rms(peaksZ.getPeaksValueWithoutZeroIdx());
+            corrNumInterZ = Utils.intersectionNumber(peaksZ.getData(), 0.2f);
+
+            ++cntNumAxis;
+            sumCorr += corrMeanZ;
+            sumRms += corrRmsZ;
+            sumNumInter += corrNumInterZ;
+        }
+
+        //no peaks, reject
+        if(cntNumAxis == 0){
+            //throw new IllegalArgumentException("All Peaks are empty! -> Reject Estimation");
+            return -1;
+        }
+
+        /*
+        System.out.println("RMS-X: " + corrRmsX);
+        System.out.println("GEO-X: " + corrMeanX);
+        System.out.println("INTER-X: " + corrNumInterX);
+
+        System.out.println("RMS-Y: " + corrRmsY);
+        System.out.println("GEO-Y: " + corrMeanY);
+        System.out.println("INTER-Y: " + corrNumInterY);
+
+        System.out.println("RMS-Z: " + corrRmsZ);
+        System.out.println("GEO-Z: " + corrMeanZ);
+        System.out.println("INTER-Z: " + corrNumInterZ);
+        */
+
+        //values to low, reject
+        //TODO: this is a pretty simple assumption. first shot!
+        if(corrRmsX < 0.25 && corrRmsY < 0.25 && corrRmsZ < 0.25){
+            return -1;
+        }
+
+        double quantityX = ((corrMeanX / sumCorr) + (corrRmsX / sumRms) + (corrNumInterX / sumNumInter)) / cntNumAxis;
+        double quantityY  = ((corrMeanY / sumCorr) + (corrRmsY / sumRms) + (corrNumInterY / sumNumInter)) / cntNumAxis;
+        double quantityZ = ((corrMeanZ / sumCorr) + (corrRmsZ / sumRms) + (corrNumInterZ / sumNumInter)) / cntNumAxis;
+
+        //get best axis by quantity and estimate bpm
+        if(quantityX > quantityY && quantityX > quantityZ){
+            return mBpmHistory_X.getLast();
+        }
+        else if(quantityY > quantityZ){
+            return mBpmHistory_Y.getLast();
+        }
+        else {
+            return mBpmHistory_Z.getLast();
+        }
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/Estimator.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/Estimator.java
@@ -0,0 +1,166 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+import android.hardware.Sensor;
+import android.util.Log;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import de.tonifetzer.conductorssensor.sensor.SensorBoard;
+import de.tonifetzer.conductorssensor.utilities.Utils;
+
+public class Estimator implements SensorBoard.OnSensorBoardDataListener {
+
+    private SensorBoard mSensorBoard;
+    private AccelerometerWindowBuffer mAccelerometerWindowBuffer;
+    private BpmEstimator mBpmEstimator;
+
+    private Timer mTimer = new Timer();
+
+    Estimator(){
+
+        mAccelerometerWindowBuffer = new AccelerometerWindowBuffer(6000, 750);
+        mBpmEstimator = new BpmEstimator(mAccelerometerWindowBuffer, 0, 5000);
+    }
+
+    public void start(SensorBoard sensorBoard){
+        if(mSensorBoard != null){
+            mSensorBoard = sensorBoard;
+            mSensorBoard.addListener(this);
+            mSensorBoard.startAccelerometer();
+
+            startWorker();
+
+        } else {
+            Log.i("Estimator","Cant start estimator. SensorBoard is null.");
+        }
+    }
+
+    public void stop(){
+        if(mSensorBoard != null){
+            mSensorBoard.removeListener(this);
+            mSensorBoard.stopAccelerometer();
+
+            mAccelerometerWindowBuffer.clear();
+
+        } else {
+            Log.i("Estimator","Cant stop estimator. SensorBoard is null.");
+        }
+    }
+
+    @Override
+    public void onAccelerometerChanged(AccelerometerData data) {
+        mAccelerometerWindowBuffer.add(data);
+
+        //todo: save data into stream and write on disk
+
+    }
+
+    private void startWorker() {
+
+        mTimer.scheduleAtFixedRate(new TimerTask() {
+            @Override
+            public void run() {
+
+                if (mAccelerometerWindowBuffer.isNextWindowReady()) {
+
+                    LinkedList<Double> bpmList = new LinkedList<>();
+
+                    //todo: wie viele dieser Klassen kann ich wegwerfen um das Ergebnis nich schlechter zu machen?
+                    double bpm60 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow());
+                    double bpm85 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow(3500, 750));
+                    double bpm110 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow(2600, 750));
+                    double bpm135 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow(2000, 750));
+                    double bpm160 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow(1600,750));
+                    double bpm200 = mBpmEstimator.estimate(mAccelerometerWindowBuffer.getFixedSizedWindow(1200, 750));
+
+                    //add to list
+                    //todo: make this cool...
+                    //vielleicht einen weighted mean?
+                    bpmList.add(bpm60);
+                    bpmList.add(bpm85);
+                    bpmList.add(bpm110); //110, 135, 160 langen auch schon
+                    bpmList.add(bpm135);
+                    bpmList.add(bpm160);
+                    bpmList.add(bpm200);
+
+                    //Log.d("BPM: ", bpmList.toString());
+
+                    //remove all -1 and calc bpmMean
+                    while(bpmList.remove(Double.valueOf(-1))) {}
+
+                    //remove outliers
+                    //todo: aktuell wird die liste hier sortiert.. eig net so schön.
+                    Utils.removeOutliersZScore(bpmList, 3.4);
+                    //Utils.removeOutliersHeuristic();
+
+                    //Log.d("BPM: ", bpmList.toString());
+
+                    double bpm = -1;
+                    if(!bpmList.isEmpty()) {
+                        double bpmMean = Utils.mean(bpmList);
+                        double bpmMedian = Utils.median(bpmList);
+
+                        double bpmDiffSlowFast = bpmList.getFirst() - bpmList.getLast();
+                        if (Math.abs(bpmDiffSlowFast) > 25) {
+
+                            double tmpBPM = bpmMean + 25;
+
+                            while(bpm == -1){
+                                if (tmpBPM < 60) {
+                                    bpm = bpm60;
+                                    if(bpm == -1){
+                                        bpm = bpmMean;
+                                    }
+                                }
+                                else if (tmpBPM < 85) {
+                                    bpm = bpm85;
+                                } else if (tmpBPM < 110) {
+                                    bpm = bpm110;
+                                } else if (tmpBPM < 135) {
+                                    bpm = bpm135;
+                                } else if (tmpBPM < 160) {
+                                    bpm = bpm160;
+                                } else {
+                                    bpm = bpm200;
+                                }
+
+                                tmpBPM -= 5;
+                            }
+
+                            //Log.d("BPM: ", "CHANGE");
+
+                        } else {
+
+                            bpm = bpmMean;
+                            //Log.d("BPM: ", "STAY");
+                        }
+
+
+                    }
+
+                    for (OnEstimationListener listener : mEstimationListeners) {
+                        listener.onNewEstimationAvailable(bpm);
+                    }
+
+                }
+            }
+        }, 0, 100);
+    }
+
+
+    /**
+     * Interface for callback calculated bpm
+     */
+    public interface OnEstimationListener {
+        void onNewEstimationAvailable(double bpm);
+    }
+
+    private List<OnEstimationListener> mEstimationListeners = new CopyOnWriteArrayList<>();
+    public void add(OnEstimationListener listener){mEstimationListeners.add(listener);}
+    public void remove(OnEstimationListener listener){mEstimationListeners.remove(listener);}
+
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/Peaks.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/estimation/Peaks.java
@@ -0,0 +1,206 @@
+package de.tonifetzer.conductorssensor.estimation;
+
+import de.tonifetzer.conductorssensor.utilities.Utils;
+
+import java.util.LinkedList;
+
+/**
+ * Created by toni on 15/12/17.
+ */
+public class Peaks {
+
+    private LinkedList<Integer> mPeaksIdx; //provide the idx within the given data array
+    private LinkedList<Integer> mPeaksPos; //the real position within the data-rang e.g. lag -1024 to 1024
+    private LinkedList<Double> mPeaksValue; //the value at mPeaksPos
+
+    private double[] mData;
+
+    /**
+     * Simple method for finding local maxima in an array
+     * @param data  input
+     * @param width minimum distance between peaks
+     * @param threshold minimum value of peaks
+     * @param decayRate how quickly previous peaks are forgotten
+     * @param isRelative minimum value of peaks is relative to local average
+     * @return array of peaks
+     */
+    public Peaks(double[] data, int width, double threshold, double decayRate, boolean isRelative){
+
+        this.mData = data;
+        this.mPeaksIdx = new LinkedList<>();
+        this.mPeaksPos = new LinkedList<>();
+        this.mPeaksValue = new LinkedList<>();
+
+        //create the peaks
+        simplePeakFinder(data, width, threshold, decayRate, isRelative);
+
+        updateLists();
+    }
+
+    public LinkedList<Integer> getPeaksIdx() {
+        return mPeaksIdx;
+    }
+
+    public int[] getPeaksIdxAsArray() {
+        return mPeaksIdx.stream().mapToInt(i->i).toArray();
+    }
+
+    public LinkedList<Integer> getPeaksPos() {
+        return mPeaksPos;
+    }
+
+    public double[] getPeaksPosAsArray() {
+        return mPeaksPos.stream().mapToDouble(i -> i).toArray();
+    }
+
+    public LinkedList<Double> getPeaksValue() {
+        return mPeaksValue;
+    }
+
+    public double[] getPeaksValueAsArray() {
+        return mPeaksValue.stream().mapToDouble(i -> i).toArray();
+    }
+
+    public double[] getData(){
+        return mData;
+    }
+
+    //TODO: implement findFalseDetectedPeaks
+    public void improveResults(double[] data){
+
+        updateLists();
+    }
+
+    public double[] getPeaksValueWithoutZeroIdx() {
+
+        double[] values = new double[mPeaksIdx.size() - 1];
+        int mid = (mData.length / 2);
+        int j = 0;
+        for(int i = 0; i < mPeaksIdx.size(); ++i){
+            if(!(mPeaksIdx.get(i) == mid)){
+                values[j] = mPeaksValue.get(i);
+                ++j;
+            }
+        }
+        return values;
+    }
+
+    public double[] getPeaksValueWithoutNegativeValues() {
+
+        double[] values = new double[mPeaksIdx.size() - 1];
+        int i = 0;
+        for(Integer idx : mPeaksIdx) {
+            double curVal = mPeaksValue.get(idx);
+            if(curVal > 0){
+                values[i] = curVal;
+                ++i;
+            }
+        }
+
+        return values;
+    }
+
+    public double[] getPeaksValueWithoutZeroIdxAndNegativeValues(){
+        double[] values = new double[mPeaksIdx.size() - 1];
+        int mid = (mData.length / 2);
+        int j = 0;
+        for(int i = 0; i < mPeaksIdx.size(); ++i){
+            double curVal = mPeaksValue.get(i);
+            if(!(mPeaksIdx.get(i) == mid) && curVal > 0){
+                values[j] = curVal;
+                ++j;
+            }
+        }
+        return values;
+    }
+
+    public boolean hasPeaks() {
+        return mPeaksIdx.size() > 1;
+    }
+
+    /**
+     * Provides an estimation of beats per minute given a samplerate in milliseconds
+     * @param sampleRate_ms
+     * @return bpm if peaks found and conducting activity recognized, else -1
+     */
+    public double getBPM(double sampleRate_ms){
+
+        //todo: rückweisungsklasse kann auch hier mit rein.
+        if(hasPeaks()){
+
+            //todo diff and mean method for linkedlists for speed
+            //return 60000 / Utils.mean(Utils.diff(mPeaksPos.stream().mapToDouble(i -> i * sampleRate_ms).toArray()));
+            return 60000 / (sampleRate_ms * Utils.mean(Utils.diff(mPeaksPos.stream().mapToDouble(i -> i).toArray())));
+        }
+
+        return -1;
+    }
+
+    /**
+     * updates the position and values of the found peaks.
+     * call this if peaks are somewhat changed.
+     */
+    private void updateLists(){
+        //fill the position and the value lists
+        for(Integer idx : mPeaksIdx){
+            int mid = (mData.length / 2);
+            mPeaksPos.add(idx - mid);
+
+            mPeaksValue.add(mData[idx]);
+        }
+    }
+
+    //TODO: findPeaks method identical to Matlab... with PeakProminence
+
+    private void simplePeakFinder(double[] data, int width, double threshold, double decayRate, boolean isRelative) {
+        int maxp;
+        int mid = 0;
+        int end = data.length;
+        double av = data[0];
+        while (mid < end) {
+            av = decayRate * av + (1 - decayRate) * data[mid];
+            if (av < data[mid])
+                av = data[mid];
+            int i = mid - width;
+            if (i < 0)
+                i = 0;
+            int stop = mid + width + 1;
+            if (stop > data.length)
+                stop = data.length;
+            maxp = i;
+            for (i++; i < stop; i++)
+                if (data[i] > data[maxp])
+                    maxp = i;
+            if (maxp == mid) {
+                if (overThreshold(data, maxp, width, threshold, isRelative, av)){
+                    this.mPeaksIdx.add(new Integer(maxp));
+                }
+            }
+            mid++;
+        }
+    }
+
+    private boolean overThreshold(double[] data, int index, int width,
+                                  double threshold, boolean isRelative,
+                                  double av) {
+        int pre = 3;
+        int post = 1;
+
+        if (data[index] < av)
+            return false;
+        if (isRelative) {
+            int iStart = index - pre * width;
+            if (iStart < 0)
+                iStart = 0;
+            int iStop = index + post * width;
+            if (iStop > data.length)
+                iStop = data.length;
+            double sum = 0;
+            int count = iStop - iStart;
+            while (iStart < iStop)
+                sum += data[iStart++];
+            return (data[index] > sum / count + threshold);
+        } else
+            return (data[index] > threshold);
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/ConnectFragment.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/ConnectFragment.java
@@ -0,0 +1,349 @@
+package de.tonifetzer.conductorssensor.sensor;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.le.BluetoothLeScanner;
+import android.bluetooth.le.ScanCallback;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanResult;
+import android.bluetooth.le.ScanSettings;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import de.tonifetzer.conductorssensor.R;
+
+//TODO: wenn gerät bereits gekoppelt und out of range. disconnected er oft nicht und dann kann ich selbst über einen scan das devices
+//TODO: nicht mehr finden. kein plan woran das liegt.
+
+
+public class ConnectFragment extends Fragment implements View.OnClickListener, AdapterView.OnItemClickListener, SensorBoard.OnSensorBoardConnectListener {
+
+    private Button mRefreshButton;
+    private ProgressBar mProgressBar;
+    private ProgressBar mProgressBarBleItem;
+
+    private ListView mListViewConnected;
+    private ArrayList<String> mDeviceListConnectedAsStrings = new ArrayList<>();
+    private ArrayAdapter<String> mAdapterListViewConnected;
+    private SensorBoard mSensorBoard;
+    private boolean mConnectionPending = false;
+
+    private ArrayList<String> mDeviceListAsStrings = new ArrayList<>();
+    private ListView mListViewNotConnected;
+    private ArrayAdapter<String> mAdapterListViewNotConnected;
+    private Map<String, BluetoothDevice> mDeviceList = new LinkedHashMap<>();;
+
+    private BluetoothAdapter mBluetoothAdapter;
+    private Handler mHandler;
+    private BluetoothLeScanner mLEScanner;
+    private ScanSettings settings;
+    private List<ScanFilter> filters;
+
+    private static final long SCAN_PERIOD = 5000;
+    private static final int REQUEST_ENABLE_BT = 666;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+
+        View myView = inflater.inflate(R.layout.fragment_connect, container, false);
+        mListViewNotConnected = (ListView) myView.findViewById(R.id.listbte);
+        mListViewConnected = (ListView) myView.findViewById(R.id.listbteConnected);
+        mRefreshButton = (Button) myView.findViewById(R.id.btnRefresh);
+        mProgressBar = (ProgressBar) myView.findViewById(R.id.progressBar);
+
+        //TODO: parentclass for the stuff below... this is fckn. ugly
+        //stuff for updating the listView of ble devices not connected
+        mAdapterListViewNotConnected = new ArrayAdapter<>(getContext(),R.layout.listview_costume, R.id.TextViewBleDevice, mDeviceListAsStrings);
+        mListViewNotConnected.setAdapter(mAdapterListViewNotConnected);
+        TextView tmpTxtView1 = new TextView(getContext());
+        tmpTxtView1.setText("not connected");
+        mListViewNotConnected.addHeaderView(tmpTxtView1);
+
+        //stuff for updating the listView of ble devices already connected
+        mAdapterListViewConnected = new ArrayAdapter<>(getContext(),R.layout.listview_costume, R.id.TextViewBleDevice, mDeviceListConnectedAsStrings);
+        mListViewConnected.setAdapter(mAdapterListViewConnected);
+        TextView tmpTxtView2 = new TextView(getContext());
+        tmpTxtView2.setText("connected");
+        mListViewConnected.addHeaderView(tmpTxtView2);
+
+        //set the click listener
+        mListViewNotConnected.setOnItemClickListener(this);
+        mListViewConnected.setOnItemClickListener(this);
+
+        mRefreshButton.setOnClickListener(this);
+
+        // Inflate the layout for this fragment
+        return myView;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+
+        // Use this check to determine whether BLE is supported on the device. Then
+        // you can selectively disable BLE-related features.
+        if (!getActivity().getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
+            Toast.makeText(getActivity(), R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
+            mRefreshButton.setText(R.string.ble_not_supported);
+            mRefreshButton.setEnabled(false);
+            getActivity().finish();
+        } else {
+            //start bluetooth
+            final BluetoothManager bluetoothManager = (BluetoothManager) getActivity().getSystemService(Context.BLUETOOTH_SERVICE);
+            mBluetoothAdapter = bluetoothManager.getAdapter();
+        }
+
+        // init
+        mHandler = new Handler();
+        mSensorBoard = new SensorBoard(getContext());
+        mSensorBoard.addListener(this);
+
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        //TODO: automatically connect to device saved earlier
+        //TODO: implement this
+        //mUserChosenDevice = Settings::DefaultDevice.. oder sowas
+        updateListOfConnectedDevices();
+
+        if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
+            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
+            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
+        } else {
+            if (Build.VERSION.SDK_INT >= 21) {
+                mLEScanner = mBluetoothAdapter.getBluetoothLeScanner();
+                settings = new ScanSettings.Builder()
+                        .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
+                        .build();
+                filters = new ArrayList<ScanFilter>();
+            }
+            scanLeDevice(true);
+        }
+
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        if (mBluetoothAdapter != null && mBluetoothAdapter.isEnabled()) {
+            scanLeDevice(false);
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+
+        mSensorBoard.disconnect();
+        mSensorBoard.onDestroy();
+    }
+
+    //todo: show rssi
+    private void scanLeDevice(final boolean enable) {
+        if (enable) {
+            mHandler.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    if (Build.VERSION.SDK_INT < 21) {
+                        mBluetoothAdapter.stopLeScan(mLeScanCallback);
+                    } else {
+                        mLEScanner.stopScan(mScanCallback);
+                    }
+
+                    mRefreshButton.setVisibility(View.VISIBLE);
+                    mProgressBar.setVisibility(View.GONE);
+                }
+            }, SCAN_PERIOD);
+            if (Build.VERSION.SDK_INT < 21) {
+                mBluetoothAdapter.startLeScan(mLeScanCallback);
+            } else {
+                mLEScanner.startScan(filters, settings, mScanCallback);
+            }
+
+            //start btn spinner
+            mRefreshButton.setVisibility(View.INVISIBLE);
+            mProgressBar.setVisibility(View.VISIBLE);
+
+            //clear the device lists
+            mDeviceList.clear();
+            mDeviceListAsStrings.clear();
+            mAdapterListViewNotConnected.notifyDataSetChanged();
+
+        } else {
+            if (Build.VERSION.SDK_INT < 21) {
+                mBluetoothAdapter.stopLeScan(mLeScanCallback);
+            } else {
+                mLEScanner.stopScan(mScanCallback);
+            }
+
+            mRefreshButton.setVisibility(View.VISIBLE);
+            mProgressBar.setVisibility(View.GONE);
+        }
+    }
+
+    private ScanCallback mScanCallback = new ScanCallback() {
+
+        @Override
+        public void onScanResult(int callbackType, ScanResult result) {
+            Log.i("callbackType", String.valueOf(callbackType));
+            Log.i("result", result.toString());
+
+            BluetoothDevice btDevice = result.getDevice();
+            if(!mDeviceList.containsKey(btDevice.getAddress())){
+
+                mDeviceList.put(btDevice.getAddress(), btDevice);
+                mDeviceListAsStrings.add(btDevice.getName() + "\n" + btDevice.getAddress());
+                mAdapterListViewNotConnected.notifyDataSetChanged();
+            }
+        }
+
+        @Override
+        public void onBatchScanResults(List<ScanResult> results) {
+            for (ScanResult sr : results) {
+                Log.i("ScanResult - Results", sr.toString());
+            }
+        }
+
+        @Override
+        public void onScanFailed(int errorCode) {
+            Log.e("Scan Failed", "Error Code: " + errorCode);
+        }
+    };
+
+    private BluetoothAdapter.LeScanCallback mLeScanCallback =
+            new BluetoothAdapter.LeScanCallback() {
+                @Override
+                public void onLeScan(final BluetoothDevice device, int rssi,
+                                     byte[] scanRecord) {
+                    getActivity().runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            Log.i("onLeScan", device.toString());
+
+                            if(!mDeviceList.containsKey(device.getAddress())){
+
+                                mDeviceList.put(device.getAddress(), device);
+                                mDeviceListAsStrings.add(device.getName() + "\n" + device.getAddress());
+                                mAdapterListViewNotConnected.notifyDataSetChanged();
+                            }
+                        }
+                    });
+                }
+            };
+
+    @Override
+    public void onClick(View view) {
+        switch (view.getId()) {
+            case R.id.btnRefresh:
+                scanLeDevice(true);
+                break;
+        }
+    }
+
+    @Override
+    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
+
+        //if someone clicks on the header, just return
+        if(id == -1 || mConnectionPending){
+            return;
+        }
+
+        //stop scan
+        scanLeDevice(false);
+
+        if (mSensorBoard.isConnected()){
+
+            // if we clicked on the same device as connected, just disconnect and refresh unconnected list
+            if(adapterView.getId() == R.id.listbteConnected){
+                mSensorBoard.disconnect();
+                scanLeDevice(true);
+                return;
+            }
+
+            mSensorBoard.disconnect();
+        }
+
+        if (!mDeviceList.isEmpty()){
+
+            mProgressBarBleItem = view.findViewById(R.id.ProgressBarConnecting);
+            mProgressBarBleItem.setVisibility(View.VISIBLE);
+            mConnectionPending = true;
+
+            // connect fresh sensor
+            BluetoothDevice curDevice = (new ArrayList<>(mDeviceList.values())).get((int) id);
+            mSensorBoard.connect(curDevice);
+        }
+
+    }
+
+    public void updateListOfConnectedDevices(){
+        mDeviceListConnectedAsStrings.clear();
+        if(mSensorBoard.isConnected()){
+            mDeviceListConnectedAsStrings.add(mSensorBoard.getName() + "\n" + mSensorBoard.getAddress());
+        }
+        mAdapterListViewConnected.notifyDataSetChanged();
+    }
+
+    public void removeElementOfListOfNotConnectedDevices(String key){
+        mDeviceList.remove(key);
+        mDeviceListAsStrings.clear();
+        for(Map.Entry<String, BluetoothDevice> entry : mDeviceList.entrySet()){
+            mDeviceListAsStrings.add(entry.getValue().getName()+ "\n" + entry.getValue().getAddress());
+        }
+        mAdapterListViewNotConnected.notifyDataSetChanged();
+    }
+
+    @Override
+    public void onSensorConnected() {
+
+        removeElementOfListOfNotConnectedDevices(mSensorBoard.getAddress());
+        updateListOfConnectedDevices();
+        mProgressBarBleItem.setVisibility(View.GONE);
+        mConnectionPending = false;
+    }
+
+    @Override
+    public void onSensorConnectionFailed() {
+        mProgressBarBleItem.setVisibility(View.GONE);
+        mConnectionPending = false;
+    }
+
+    @Override
+    public void onSensorDisconnected() {
+
+        updateListOfConnectedDevices();
+        Toast.makeText(getActivity(), "Disconnected", Toast.LENGTH_LONG).show();
+        mProgressBarBleItem.setVisibility(View.GONE);
+        mConnectionPending = false;
+    }
+
+    public SensorBoard getSensorBoard() {
+        return mSensorBoard;
+    }
+}
+
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/DeviceListView.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/DeviceListView.java
@@ -0,0 +1,4 @@
+package de.tonifetzer.conductorssensor.sensor;
+
+public class DeviceListView {
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/SensorBoard.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/sensor/SensorBoard.java
@@ -0,0 +1,268 @@
+package de.tonifetzer.conductorssensor.sensor;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.util.Log;
+import android.view.View;
+import android.widget.ProgressBar;
+import android.widget.Toast;
+
+import com.mbientlab.metawear.Data;
+import com.mbientlab.metawear.MetaWearBoard;
+import com.mbientlab.metawear.Route;
+import com.mbientlab.metawear.Subscriber;
+import com.mbientlab.metawear.android.BtleService;
+import com.mbientlab.metawear.builder.RouteBuilder;
+import com.mbientlab.metawear.builder.RouteComponent;
+import com.mbientlab.metawear.data.Acceleration;
+import com.mbientlab.metawear.module.Accelerometer;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.TimeUnit;
+
+import bolts.Continuation;
+import bolts.Task;
+import de.tonifetzer.conductorssensor.estimation.AccelerometerData;
+
+public class SensorBoard implements ServiceConnection {
+
+    private BtleService.LocalBinder serviceBinder;
+    private MetaWearBoard mMetaBoard;
+    private BluetoothDevice mBluetoothDevice;
+    private Accelerometer mAccelerometer;
+
+    private boolean mBoardConnected = false;
+
+    private Context mContext;
+
+    SensorBoard(Context context){
+        mContext = context;
+
+        // bind the btleService from MetaWear
+        mContext.bindService(new Intent(mContext, BtleService.class),
+                this, Context.BIND_AUTO_CREATE);
+    }
+
+    @Override
+    public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
+        serviceBinder = (BtleService.LocalBinder) iBinder;
+    }
+
+    @Override
+    public void onServiceDisconnected(ComponentName componentName) {
+
+    }
+
+    protected void disconnect(){
+
+        if(!mBoardConnected){
+            return;
+        }
+
+        mMetaBoard.tearDown();
+
+        boolean isCompleted = false;
+        try {
+            isCompleted = mMetaBoard.disconnectAsync().waitForCompletion(5, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        if(!isCompleted){
+            Toast.makeText(mContext, "Failed to disconnect. Try again.", Toast.LENGTH_SHORT).show();
+            Log.i("SensorBoard", "Failed to disconnect Metaboard after 5 seconds.");
+            return;
+        }
+
+        serviceBinder.removeMetaWearBoard(mBluetoothDevice);
+
+        //note: it is important to call this in main loop!
+        for(OnSensorBoardConnectListener listener : mConnectListeners){
+            listener.onSensorDisconnected();
+        }
+
+
+        mBluetoothDevice = null;
+        mBoardConnected = false;
+
+        Toast.makeText(mContext, "Disconnected", Toast.LENGTH_LONG).show();
+
+    }
+
+    protected void onDestroy() {
+
+        // Unbind the service when the activity is destroyed
+        mContext.unbindService(this);
+    }
+
+    protected void connect(BluetoothDevice device){
+
+        //connect with metawear
+        mMetaBoard = serviceBinder.getMetaWearBoard(device);
+
+        mMetaBoard.connectAsync().continueWith(new Continuation<Void, Void>() {
+            @Override
+            public Void then(Task<Void> task) throws Exception {
+                if (task.isFaulted()) {
+                    Log.i("ConnectFragment", "Failed to connect BLE");
+
+                    //send toast to UiThread
+                    new Handler(Looper.getMainLooper()).post(new Runnable() {
+                        public void run() {
+
+                            for(OnSensorBoardConnectListener listener : mConnectListeners){
+                                listener.onSensorConnectionFailed();
+                            }
+
+                            //bar.setVisibility(View.GONE);
+                            Toast.makeText(mContext, "Failed to connect", Toast.LENGTH_LONG).show();
+                        }
+                    });
+                } else {
+                    Log.i("ConnectFragment", "Connected BLE");
+
+                    //send toast to UiThread
+                    new Handler(Looper.getMainLooper()).post(new Runnable() {
+                        public void run() {
+
+                            mBoardConnected = true;
+                            mBluetoothDevice = device;
+
+                            //note: it is important to call this in main loop!
+                            for(OnSensorBoardConnectListener listener : mConnectListeners){
+                                listener.onSensorConnected();
+                            }
+
+                            //bar.setVisibility(View.GONE);
+                            Toast.makeText(mContext, "Connected", Toast.LENGTH_LONG).show();
+                        }
+                    });
+
+
+                    //this need to be set after the connection is established! beware of async tasks
+                    //TODO: this seems to work poorly.. why?!
+                    mMetaBoard.onUnexpectedDisconnect(new MetaWearBoard.UnexpectedDisconnectHandler() {
+                        @Override
+                        public void disconnected(int status) {
+                            Log.i("ConnectFragment", "Unexpectedly lost connection: " + status);
+
+                            //send toast to UiThread
+                            new Handler(Looper.getMainLooper()).post(new Runnable() {
+                                public void run() {
+
+                                    for(OnSensorBoardConnectListener listener : mConnectListeners){
+                                        listener.onSensorConnectionFailed();
+                                    }
+
+                                    //bar.setVisibility(View.GONE);
+                                    Toast.makeText(mContext, "Connection lost!", Toast.LENGTH_SHORT).show();
+                                }
+                            });
+                        }
+                    });
+
+                }
+                return null;
+            }
+        });
+    }
+
+    public boolean isConnected() {
+        return mBoardConnected && mMetaBoard.isConnected();
+    }
+
+    public String getAddress(){
+
+        if(!mBoardConnected){
+            return "unkown";
+        }
+
+        return mBluetoothDevice.getAddress();
+    }
+
+    public String getName(){
+
+        if(!mBoardConnected){
+            return "unkown";
+        }
+
+        return mBluetoothDevice.getName();
+    }
+
+    public void startAccelerometer(){
+
+        if(mMetaBoard.isConnected()){
+            mAccelerometer = mMetaBoard.getModule(Accelerometer.class);
+
+            mAccelerometer.configure()
+                    .odr(75f)  // 75hz
+                    .commit();
+
+            mAccelerometer.acceleration().addRouteAsync(new RouteBuilder() {
+                @Override
+                public void configure(RouteComponent source) {
+                    source.stream(new Subscriber() {
+                        @Override
+                        public void apply(Data data, Object... env) {
+                            Log.i("MainActivity", data.value(Acceleration.class).toString());
+
+                            for(OnSensorBoardDataListener listener : mDataListeners){
+                                listener.onAccelerometerChanged(new AccelerometerData(
+                                        System.currentTimeMillis(),
+                                        data.value(Acceleration.class).x(),
+                                        data.value(Acceleration.class).y(),
+                                        data.value(Acceleration.class).z()));
+                            }
+                        }
+                    });
+                }
+            }).continueWith(new Continuation<Route, Void>() {
+                @Override
+                public Void then(Task<Route> task) throws Exception {
+                    mAccelerometer.acceleration().start();
+                    mAccelerometer.start();
+                    return null;
+                }
+            });
+
+        }
+
+    }
+
+    public void stopAccelerometer(){
+
+        if(mMetaBoard.isConnected()){
+            mAccelerometer.stop();
+        }
+
+    }
+
+
+    /**
+     * Interface for callback onConnectionInfos
+     */
+    public interface OnSensorBoardConnectListener {
+        void onSensorConnected();
+        void onSensorConnectionFailed();
+        void onSensorDisconnected();
+    }
+
+    private List<OnSensorBoardConnectListener> mConnectListeners = new CopyOnWriteArrayList<>();
+    public void addListener(OnSensorBoardConnectListener listener){mConnectListeners.add(listener);}
+    public void removeListener(OnSensorBoardConnectListener listener){mConnectListeners.remove(listener);}
+
+    public interface OnSensorBoardDataListener {
+        void onAccelerometerChanged(AccelerometerData data);
+    }
+
+    private List<OnSensorBoardDataListener> mDataListeners = new CopyOnWriteArrayList<>();
+    public void addListener(OnSensorBoardDataListener listener){mDataListeners.add(listener);}
+    public void removeListener(OnSensorBoardDataListener listener){mDataListeners.remove(listener);}
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/settings/SettingsFragment.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/settings/SettingsFragment.java
@@ -0,0 +1,18 @@
+package de.tonifetzer.conductorssensor.settings;
+
+import android.os.Bundle;
+import android.support.v7.preference.PreferenceFragmentCompat;
+import de.tonifetzer.conductorssensor.R;
+
+
+/**
+ * Taken from: https://medium.com/@JakobUlbrich/building-a-settings-screen-for-android-part-1-5959aa49337c
+ */
+public class SettingsFragment extends PreferenceFragmentCompat {
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        // Load the Preferences from the XML file
+        addPreferencesFromResource(R.xml.app_preference);
+    }
+
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/MovingFilter.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/MovingFilter.java
@@ -0,0 +1,35 @@
+package de.tonifetzer.conductorssensor.utilities;
+
+import java.util.LinkedList;
+
+public class MovingFilter {
+
+    private int mSize;
+    private double mTotal = 0d;
+    private LinkedList<Double> mSamples = new LinkedList<>();
+
+    public MovingFilter(int size) {
+        this.mSize = size;
+    }
+
+    public void add(double x) {
+        mTotal += x;
+        mSamples.add(x);
+        if(mSamples.size() > mSize){
+            mTotal -= mSamples.remove();
+        }
+    }
+
+    public double getAverage() {
+        return mTotal / mSamples.size();
+    }
+
+    public double getMedian() {
+        return Utils.median(mSamples);
+    }
+
+    public void clear(){
+        mSamples.clear();
+        mTotal = 0d;
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/SimpleKalman.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/SimpleKalman.java
@@ -0,0 +1,30 @@
+package de.tonifetzer.conductorssensor.utilities;
+
+public class SimpleKalman {
+
+    private double mSigmaUpdate;
+    private double mSigmaPrediction;
+    private double mMu;
+    private double mSigma;
+
+    SimpleKalman(double initialMu, double initialSigma, double sigmaUpdate, double sigmaPrediction){
+        mSigmaUpdate = sigmaUpdate;
+        mSigmaPrediction = sigmaPrediction;
+        mMu = initialMu;
+        mSigma = initialSigma;
+    }
+
+    public double update(double data){
+
+        //prediction
+        mMu = mMu;
+        mSigma += mSigmaPrediction;
+
+        //update
+        double k = mSigma / (mSigma + mSigmaUpdate);
+        mMu = mMu + k * (data - mMu);
+        mSigma = (1 - k) * mSigma;
+
+        return mMu;
+    }
+}
--- a/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/Utils.java
+++ b/android/ConductorsSensor/app/src/main/java/de/tonifetzer/conductorssensor/utilities/Utils.java
@@ -0,0 +1,203 @@
+package de.tonifetzer.conductorssensor.utilities;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.util.DisplayMetrics;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+
+//TODO: change from double to generic type
+public class Utils {
+    public static double getDistance(double x1, double y1, double x2, double y2) {
+        return (double) Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
+    }
+
+    public static double sqr(double x) {
+        return x * x;
+    }
+
+    public static int nextPow2(int a){
+        return a == 0 ? 0 : 32 - Integer.numberOfLeadingZeros(a - 1);
+    }
+
+    public static double sum(double[] data){
+        double sum = 0;
+        for (int i = 0; i < data.length; i++) {
+            sum += data[i];
+        }
+        return sum;
+    }
+
+    public static long sum(long[] data){
+        long sum = 0;
+        for (int i = 0; i < data.length; i++) {
+            sum += data[i];
+        }
+        return sum;
+    }
+
+    public static double sum (List<Double> data){
+        double sum = 0;
+        for (int i = 0; i < data.size(); i++) {
+            sum += data.get(i).doubleValue();
+        }
+        return sum;
+    }
+
+    //TODO: Could be slow.. faster method?
+    public static double rms(double[] nums) {
+        double sum = 0.0f;
+        for (double num : nums)
+            sum += num * num;
+        return Math.sqrt(sum / nums.length);
+    }
+
+    public static double[] diff(double[] data){
+        double[] diff = new double[data.length - 1];
+        int i=0;
+        for(int j = 1; j < data.length; ++j){
+            diff[i] = data[j] - data[i];
+            ++i;
+        }
+        return diff;
+    }
+
+    public static long[] diff(long[] data){
+        long[] diff = new long[data.length - 1];
+        int i=0;
+        for(int j = 1; j < data.length; ++j){
+            diff[i] = data[j] - data[i];
+            ++i;
+        }
+        return diff;
+    }
+
+    public static double mean(double[] data){
+        return sum(data) / data.length;
+    }
+
+    public static double mean(long[] data){
+        return (double) sum(data) / (double) data.length;
+    }
+
+    public static double mean(List<Double> data){
+        return sum(data) / data.size();
+    }
+
+    public static double median(List<Double> data){
+        data.sort(Comparator.naturalOrder());
+
+        double median;
+        if (data.size() % 2 == 0)
+            median = (data.get(data.size()/2) + data.get(data.size()/2 - 1))/2;
+        else
+            median = data.get(data.size()/2);
+
+        return median;
+    }
+
+    public static double mad(List<Double> data){
+
+        double median = median(data);
+
+        List<Double> tmpList = new ArrayList<>();
+        for(double value : data){
+            tmpList.add(Math.abs(value - median));
+        }
+
+        return median(tmpList);
+    }
+
+    //TODO: Could be slow.. faster method?
+    public static double geometricMean(double[] data) {
+        double sum = data[0];
+        for (int i = 1; i < data.length; i++) {
+            sum *= data[i];
+        }
+        return Math.pow(sum, 1.0 / data.length);
+    }
+
+    public static int intersectionNumber(double[] signal, double border){
+        int cnt = 0;
+        boolean isSmallerValue = false;
+        boolean isBiggerValue = false;
+
+        for(double value : signal){
+            if(value < border){
+                if(isBiggerValue){
+                    cnt++;
+                }
+
+                isSmallerValue = true;
+                isBiggerValue = false;
+            }
+            else {
+                if(isSmallerValue){
+                    cnt++;
+                }
+
+                isSmallerValue = false;
+                isBiggerValue = true;
+            }
+        }
+
+        return cnt;
+    }
+
+    public static double[] removeZero(double[] array){
+        int j = 0;
+        for( int i=0;  i<array.length;  i++ )
+        {
+            if (array[i] != 0){
+                array[j++] = array[i];
+            }
+        }
+        double[] newArray = new double[j];
+        System.arraycopy( array, 0, newArray, 0, j );
+
+        return newArray;
+    }
+
+    public static double[] greaterZero(double[] array){
+        int j = 0;
+        for( int i=0;  i < array.length;  i++ )
+        {
+            if (array[i] > 0){
+                array[j++] = array[i];
+            }
+        }
+        double[] newArray = new double[j];
+        System.arraycopy( array, 0, newArray, 0, j );
+
+        return newArray;
+    }
+
+    public static float convertDpToPixel(float dp, Context context) {
+        Resources resources = context.getResources();
+        DisplayMetrics metrics = resources.getDisplayMetrics();
+        return dp * ((float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
+    }
+
+    public static float convertPixelsToDp(float px, Context context) {
+        Resources resources = context.getResources();
+        DisplayMetrics metrics = resources.getDisplayMetrics();
+        return px / ((float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
+    }
+
+    public static void removeOutliersZScore(List<Double> data, double score) {
+
+        if(!data.isEmpty()){
+            double median = median(data);
+            double mad = mad(data);
+
+            for(Iterator<Double> it = data.iterator(); it.hasNext(); ){
+
+                double M = Math.abs((0.6745 * (it.next() - median)) / mad);
+                if (M > score){ it.remove(); }
+            }
+        }
+    }
+}
--- a/android/ConductorsSensor/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
+++ b/android/ConductorsSensor/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1" />
+</vector>
--- a/android/ConductorsSensor/app/src/main/res/drawable/ic_iconmonstr_menu_1.xml
+++ b/android/ConductorsSensor/app/src/main/res/drawable/ic_iconmonstr_menu_1.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M24,6h-24v-4h24v4zM24,10h-24v4h24v-4zM24,18h-24v4h24v-4z"/>
+</vector>
--- a/android/ConductorsSensor/app/src/main/res/drawable/ic_iconmonstr_undo_4.xml
+++ b/android/ConductorsSensor/app/src/main/res/drawable/ic_iconmonstr_undo_4.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M17.026,22.957c10.957,-11.421 -2.326,-20.865 -10.384,-13.309l2.464,2.352h-9.106v-8.947l2.232,2.229c14.794,-13.203 31.51,7.051 14.794,17.675z"/>
+</vector>
--- a/android/ConductorsSensor/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/android/ConductorsSensor/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillColor="#26A69A"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+</vector>
--- a/android/ConductorsSensor/app/src/main/res/layout/activity_main.xml
+++ b/android/ConductorsSensor/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:id="@+id/main">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/topbar"
+        android:orientation="horizontal">
+
+        <RelativeLayout
+            android:id="@+id/relativeLayout1"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content">
+
+            <ImageButton
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentStart="true"
+                android:contentDescription="@string/descr_overflow_button"
+                android:onClick="onBackPressed"
+                android:src="@drawable/ic_iconmonstr_undo_4"
+                android:background="@null"
+                android:paddingLeft="12dp"
+                android:paddingTop="12dp"
+                android:visibility="invisible"
+                android:id="@+id/backBtn"/>
+
+            <ImageButton
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:contentDescription="@string/descr_overflow_button"
+                android:onClick="showPopup"
+                android:src="@drawable/ic_iconmonstr_menu_1"
+                android:layout_alignParentEnd="true"
+                android:background="@null"
+                android:paddingRight="12dp"
+                android:paddingTop="12dp"/>
+        </RelativeLayout>
+
+    </LinearLayout>
+
+
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/mainContent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:gravity="center"
+            android:id="@+id/bpmContent">
+
+            <ToggleButton
+                android:id="@+id/startBtn"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textOn="Recording"
+                android:textOff="Off" />
+
+            <TextView
+                android:id="@+id/bpmText"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:soundEffectsEnabled="true"
+                android:text="80"
+                android:textColor="#158b69"
+                android:textSize="100sp"
+                android:textStyle="bold"
+                android:layout_centerHorizontal="true"/>
+
+            <TextView
+                android:id="@+id/Text"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:soundEffectsEnabled="true"
+                android:text="Kommentare zur Aufnahme:"
+                android:textStyle="bold" />
+
+            <EditText
+                android:id="@+id/comments"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:ems="10"
+                android:inputType="textMultiLine"
+                android:text=""
+                android:layout_centerHorizontal="true"/>
+
+        </LinearLayout>
+    </RelativeLayout>
+
+
+</LinearLayout>
--- a/android/ConductorsSensor/app/src/main/res/layout/fragment_connect.xml
+++ b/android/ConductorsSensor/app/src/main/res/layout/fragment_connect.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:gravity="center"
+    android:id="@+id/settingsContainer">
+
+    <ListView android:id="@+id/listbteConnected"
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent" />
+
+    <ListView android:id="@+id/listbte"
+        android:layout_height="0dip"
+        android:layout_width="match_parent"
+        android:layout_weight="1" />
+
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal">
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Refresh"
+            android:id="@+id/btnRefresh"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="30dp"
+            android:padding="20dp"
+            android:focusable="false"
+            android:focusableInTouchMode="false" />
+
+        <ProgressBar
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:id="@+id/progressBar"
+            android:layout_alignBottom="@+id/btnRefresh"
+            android:layout_marginBottom="3dp"/>
+
+    </RelativeLayout>
+
+</LinearLayout>
--- a/android/ConductorsSensor/app/src/main/res/layout/listview_costume.xml
+++ b/android/ConductorsSensor/app/src/main/res/layout/listview_costume.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2006 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<FrameLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <TextView
+    android:id="@+id/TextViewBleDevice"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textAppearance="?android:attr/textAppearanceListItemSmall"
+    android:gravity="center_vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall" />
+
+    <ProgressBar
+        android:id="@+id/ProgressBarConnecting"
+        style="?android:attr/progressBarStyleSmall"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end|center_vertical"
+        android:layout_marginEnd="4dp"
+        android:visibility="gone"/>
+
+    <ImageView
+        android:id="@+id/imageViewConnected"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@android:drawable/presence_online"
+        android:layout_gravity="end|center_vertical"
+        android:layout_marginEnd="4dp"
+        android:visibility="gone"
+        android:contentDescription="connected" />
+
+</FrameLayout>
--- a/android/ConductorsSensor/app/src/main/res/menu/settings.xml
+++ b/android/ConductorsSensor/app/src/main/res/menu/settings.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item android:id="@+id/action_bluetooth"
+        android:title="@string/connect_bluetooth"
+        app:showAsAction="never"/>
+
+    <!-- Settings, should always be in the overflow -->
+    <item android:id="@+id/action_settings"
+        android:title="@string/action_settings"
+        app:showAsAction="never"/>
+</menu>
--- a/android/ConductorsSensor/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/android/ConductorsSensor/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/android/ConductorsSensor/app/src/main/res/mipmap-hdpi/ic_launcher.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-hdpi/ic_launcher.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-mdpi/ic_launcher.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-mdpi/ic_launcher.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xhdpi/ic_launcher.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
--- a/android/ConductorsSensor/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+++ b/android/ConductorsSensor/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
--- a/android/ConductorsSensor/app/src/main/res/values/colors.xml
+++ b/android/ConductorsSensor/app/src/main/res/values/colors.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>
--- a/android/ConductorsSensor/app/src/main/res/values/strings.xml
+++ b/android/ConductorsSensor/app/src/main/res/values/strings.xml
@@ -0,0 +1,7 @@
+<resources>
+    <string name="app_name">ConductorsSensor</string>
+    <string name="action_settings">settings</string>
+    <string name="connect_bluetooth">connect</string>
+    <string name="descr_overflow_button">menu</string>
+    <string name="ble_not_supported">Device not supported!</string>
+</resources>
--- a/android/ConductorsSensor/app/src/main/res/values/styles.xml
+++ b/android/ConductorsSensor/app/src/main/res/values/styles.xml
@@ -0,0 +1,13 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
+    </style>
+
+</resources>
--- a/android/ConductorsSensor/app/src/main/res/xml/app_preference.xml
+++ b/android/ConductorsSensor/app/src/main/res/xml/app_preference.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.preference.PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/settingsContainer">
+
+    <android.support.v7.preference.PreferenceCategory
+        android:title="Category 1">
+
+        <android.support.v7.preference.SwitchPreferenceCompat
+            android:key="key1"
+            android:title="Switch Preference"
+            android:summary="Switch Summary"
+            android:defaultValue="true" />
+
+        <android.support.v7.preference.EditTextPreference
+            android:key="key2"
+            android:title="EditText Preference"
+            android:summary="EditText Summary"
+            android:dialogMessage="Dialog Message"
+            android:defaultValue="Default value" />
+
+        <android.support.v7.preference.CheckBoxPreference
+            android:key="key3"
+            android:title="CheckBox Preference"
+            android:summary="CheckBox Summary"
+            android:defaultValue="true"/>
+
+    </android.support.v7.preference.PreferenceCategory>
+
+</android.support.v7.preference.PreferenceScreen>
--- a/android/ConductorsSensor/app/src/test/java/de/tonifetzer/conductorssensor/ExampleUnitTest.java
+++ b/android/ConductorsSensor/app/src/test/java/de/tonifetzer/conductorssensor/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package de.tonifetzer.conductorssensor;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}
--- a/android/ConductorsSensor/build.gradle
+++ b/android/ConductorsSensor/build.gradle
@@ -0,0 +1,31 @@
+ // Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.1.2'
+        
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        ivy {
+            url "https://mbientlab.com/releases/ivyrep"
+            layout "gradle"
+        }
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
--- a/android/ConductorsSensor/gradle.properties
+++ b/android/ConductorsSensor/gradle.properties
@@ -0,0 +1,13 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx1536m
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
--- a/android/ConductorsSensor/gradle/wrapper/gradle-wrapper.jar
+++ b/android/ConductorsSensor/gradle/wrapper/gradle-wrapper.jar
--- a/android/ConductorsSensor/gradle/wrapper/gradle-wrapper.properties
+++ b/android/ConductorsSensor/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed May 02 14:45:42 CEST 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
--- a/android/ConductorsSensor/gradlew
+++ b/android/ConductorsSensor/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
--- a/android/ConductorsSensor/gradlew.bat
+++ b/android/ConductorsSensor/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/android/ConductorsSensor/settings.gradle
+++ b/android/ConductorsSensor/settings.gradle
@@ -0,0 +1 @@
+include ':app'
--- a/android/ConductorsWatch/app/build.gradle
+++ b/android/ConductorsWatch/app/build.gradle
@@ -9,8 +9,8 @@ android {
        minSdkVersion 23
        targetSdkVersion 26
        //sdk 2 | product version 3 | build num 2 | multi-apk 2
-        versionCode 260130301
-        versionName "0.1.3.2"
+        versionCode 260130401
+        versionName "0.1.3.3"
    }
    buildTypes {
        release {
--- a/android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/bpmEstimation/AccelerometerWindowBuffer.java
+++ b/android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/bpmEstimation/AccelerometerWindowBuffer.java
@@ -1,8 +1,6 @@
 package de.tonifetzer.conductorswatch.bpmEstimation;

-import de.tonifetzer.conductorswatch.utilities.Utils;
 import java.util.ArrayList;
-import java.util.List;

 /**
 * Created by toni on 15/12/17.