Pickle Ball Team: Darren Herbst

Created June 23, 2017

Smart Pickleball Paddle

A Smart Pickleball Paddle that will help you improve your game and promote healthy and fun excercise!

Things used in this project

Hardware components

PickleBall Paddle

Android device

Electrical Tape

Infineon Sensor Hub Nano

Software apps and online services

Android Studio

My app is in the code section of the project.

Story

Not long ago I started playing pickle ball with some local people in my hometown. A few months later I participated in my first out of town tournament; the tournament was very fun and hosted many players. They competed at different levels and also practiced very frequently (some folks daily!) to improve their game. Playing with the other players, I could see how I could improve my game as well.

The game is played with many underhand hits back and forth over the net. Sometimes the ball is hit high and an overhand shot is taken. Paddle location is critical because there is limited time to get the paddle in front of the fast moving pickle ball. A video of a pickleball game.

Typically the paddle should be held at waist level so that it is equal distant from the highest overhead shot to the lowest ground shot. As players we don't spend our time thinking about where our paddle is because we are focused on the ball. So I had the idea to help improve a players game by providing post game data of where their paddle is during a game.

(My original idea contained a Infineon Nano Sensor Hub and also an accelerometer. During the build process the accelerometer was removed to both save time and limited space on the paddle itself. The design would require quite a bit more work with a custom designed PCB so the DPS310 & accelerometer were on the same pcb communicating via a single BT connection. So this design contains the Infineon Nano Hub Pressure Sensor Board only.)

How does it work: The Sensor Nano Hub is attached to the paddle between the handle and paddle surface. I built a little box to hold the sensor in place while playing. The box is wrapped with electrical tape and placed at the base of the paddle and above the handle. The best results would have the sensor placed near the top of the paddle; I did not put the sensor there because the paddle can hit the ground when swinging close to the ground and damage the sensor possible.

1 / 2

The DPS310 sends altitude data to an Android mobile app (see code). The data is stored during gameplay and then postgame will accumulate the different altitudes into a pie graph Chart. The player can then visualize where the paddle is held during gameplay. From the images below, during gameplay the player played lots of time at the ankles, and the other player played lots of overhead. For best results the "Pause" button can be used between sets to eliminate non gameplay results.

1 / 2

Here is demo for how the sensor and app work together.

Here's a video of me playing pickle ball ...

And the Results Are!!!! ...

Code

package pickleballsmarts.smartpaddle;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.androidplot.pie.PieChart;
import com.androidplot.pie.PieRenderer;
import com.androidplot.pie.Segment;
import com.androidplot.pie.SegmentFormatter;
import com.androidplot.util.PixelUtils;
import com.infineon.sen.comm.Model.Mode;
import com.infineon.sen.comm.Model.Sensor;
import com.infineon.sen.comm.SensorEvent;
import com.infineon.sen.comm.SensorHub;
import com.infineon.sen.comm.SensorHubListener;
import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.ValueDependentColor;
import com.jjoe64.graphview.series.BarGraphSeries;
import com.jjoe64.graphview.series.DataPoint;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.TreeMap;

public class MainActivity extends AppCompatActivity {


    BluetoothAdapter mBtAdapter;
    List<BluetoothDevice> pairedDevices;
    SensorHub mSensorHub;
    String TAG = "SENSORHUB";
    GraphView graph;

    Button btnStart;
    Button btnStop;
    Button btnPauseResume;

    boolean collectData = false;
    boolean drawGraph = false;
    boolean graphed = false;
    boolean useDebugData = false;

    TreeMap tree = new TreeMap();

    // Pie Chart
    public PieChart pie;
    private Segment upper;
    private Segment middle;
    private Segment lower;
    int numberOfSegments = 5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btnStart = (Button) findViewById(R.id.btnStart);
        btnStop = (Button) findViewById(R.id.btnStop);
        btnPauseResume = (Button) findViewById(R.id.btnPauseResume);
        pie = (PieChart) findViewById(R.id.pieChart);

        pie.getLegend().setVisible(false);
        pie.getBorderPaint().setColor(Color.TRANSPARENT);
        pie.getBackgroundPaint().setColor(Color.TRANSPARENT);


        final float padding = PixelUtils.dpToPix(30);



        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "Starting to Collect Data");
                collectData = true;
                tree.clear();
                pie.clear();
            }
        });
        btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "Collect Data Stopped");
                collectData = false;
                drawGraph = true;
            }
        });
        btnPauseResume.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "Pause/Resume");
                if(collectData) {
                    collectData = false;
                    btnPauseResume.setText("Resume");
                }
                else if (!collectData) {
                    collectData = true;
                    btnPauseResume.setText("Pause");
                }
            }
        });



//series.setValuesOnTopSize(50);

        mBtAdapter = BluetoothAdapter.getDefaultAdapter();

        Set<BluetoothDevice> allPairedDevices = mBtAdapter.getBondedDevices();

        pairedDevices = new ArrayList<BluetoothDevice>();
        for (BluetoothDevice d : allPairedDevices) {
            if(isIfxDevice (d))
                pairedDevices.add(d);
        }

        mSensorHub = new SensorHub(this, pairedDevices.get(0).getAddress());
        mSensorHub.addSensorHubListener(new SensorHubListener() {
            @Override
            public void onConnected(SensorHub sensorHub) {
                Log.d(TAG, "Connected");
                setMode(null, null);
                mSensorHub.start();
            }

            @Override
            public void onDisconnected(SensorHub sensorHub) {
                Log.d(TAG, "Disconnected");
            }

            @Override
            public void onConnectionError(SensorHub sensorHub) {
                Log.d(TAG, "Connection Error");
            }

            @Override
            public void onSensorDataReceived(SensorHub sensorHub, SensorEvent sensorEvent) {
                // Log.d(TAG, sensorEvent.getTimestamp() + ":" + sensorEvent.getDataId() + ":" + sensorEvent.getSensorValue());
                if((sensorEvent.getDataId().equalsIgnoreCase("a")) && collectData) {
                    Log.d(TAG, sensorEvent.getTimestamp() + ":" + sensorEvent.getDataId() + ":" + sensorEvent.getSensorValue());
                    double sensorValue = sensorEvent.getSensorValue();
                    String key = String.format("%.4f", sensorValue);
//                    String key = Double.toString((int) sensorValue);
                    if (tree.containsKey(key)) {
                        tree.put(key, (int)tree.get(key) + 1);
                    }
                    else {
                        tree.put(key, 1);

                    }
                }

                else if (drawGraph) {
                    Log.d(TAG, "Tree size = " + tree.size());
//                    iterateOverMap(tree);
                    if (tree.size() > 0) {

                    }
                    else {
                        Toast.makeText(getApplicationContext(), "No Data Available", Toast.LENGTH_LONG).show();
                    }
                        generateDataForGraph(tree);
                    graphed = true;
                    drawGraph = false;
                }

//                Log.d(TAG, "" + collectData + graphed);
            }

            @Override
            public void onModeChanged(SensorHub sensorHub, Mode mode) {
                Log.d(TAG, mode.getSensorId() + ":" + mode.getModeId() + ":" + mode.getValue());
            }
        });
        mSensorHub.connect();
    }

    private boolean isIfxDevice(BluetoothDevice device) {

        String deviceName = device.getName().toLowerCase();
        if(deviceName.equals("ifx_nanohub"))
            return true;
        return false;
    }

    public void setMode(String sid, Mode mode) {
        if(mSensorHub.getSensorList().size() == 0) {
            Log.d(TAG, "Error: no sensor detecte");
            return;
        }

        Sensor sensor = mSensorHub.getSensorList().get(0);
        Log.d(TAG, "Setting Mode " + sensor.getId());
        // need to set the mode here - study what modes and descriptions are first
        mSensorHub.setMode(sensor.getId(), new Mode("mode", "bg"));
        mSensorHub.setMode(sensor.getId(), new Mode("prs_mr", "32"));
        mSensorHub.setMode(sensor.getId(), new Mode("prs_osr", "128"));
        mSensorHub.setMode(sensor.getId(), new Mode("temp_mr", "32"));
        mSensorHub.setMode(sensor.getId(), new Mode("temp_osr", "128"));

    }
    private void iterateOverMap(Map<String, Integer> map) {
        for (Map.Entry<String, Integer> entry : map.entrySet()) {
            Log.d(TAG, entry.getKey() + ":" + entry.getValue());
        }
    }
    private void generateDataForGraph(Map<String, Integer> map) {

        double keys[] = new double[numberOfSegments];


        double lowestKey = 0;
        double highestKey = 0;

        double increment = (highestKey - lowestKey)/numberOfSegments;
        Log.d(TAG, "Increment = " + increment);
        int mind = 25;
        int maxd = 100;

        Random r = new Random();

        if (useDebugData) {
            keys[0] = r.nextInt(maxd - mind + 1) + mind;
            keys[1] = r.nextInt(maxd - mind + 1) + mind;
            keys[2] = r.nextInt(maxd - mind + 1) + mind;
            keys[3] = r.nextInt(maxd - mind + 1) + mind;
            keys[4] = r.nextInt(maxd - mind + 1) + mind;
        }
        else {
            lowestKey = Double.valueOf((String)tree.firstKey());
            highestKey = Double.valueOf((String)tree.lastKey());
            increment = (highestKey - lowestKey)/numberOfSegments;
        }
        while (tree.size() > 0 && !useDebugData) {
            Map.Entry e = tree.pollFirstEntry();
            Log.d(TAG, "Polled Entry " + (tree.size() + 1) + " times.");

            for (int j = 0; j < numberOfSegments; j++) {
                if(((lowestKey + increment * j) <=  Double.valueOf((String)e.getKey())) && (Double.valueOf((String)e.getKey()) <= (lowestKey + increment * (j+1)))) {
                    keys[j] += 1;
                }
            }
        }

        Log.d(TAG, "Length of Keys[] " + keys.length);

        int max = 0;
        for(int i = 0; i < keys.length; i++) {
            Log.d(TAG, "Keys[] : " + keys[i]);
            max = Math.max(max, (int)keys[i]);
        }

        EmbossMaskFilter emf = new EmbossMaskFilter(
                new float[]{1, 1, 1}, 0.4f, 10, 8.2f);
        SegmentFormatter sf = new SegmentFormatter(Color.RED);




        for (int i = keys.length - 1; i>=0; i--) {
            if (i == 4 || i == 0) {
                sf = new SegmentFormatter(getResources().getColor(R.color.edge));
            }
            else if (i == 3 || i == 1) {
                sf = new SegmentFormatter(getResources().getColor(R.color.middle));
            }
            else if (i == 2) {
                sf = new SegmentFormatter(getResources().getColor(R.color.center));
            }


            sf.getLabelMarkerPaint().setShadowLayer(3, 0, 0, Color.BLACK);
            sf.getFillPaint().setMaskFilter(emf);
//            sf.setOuterInset((float)(max * 50/keys[i]));
            sf.setOuterInset((float)(300-keys[i]/max*300));
            sf.setRadialInset(1);
            //sf.setInnerInset((float)(keys[i] * 5));
            Segment seg = new Segment("", 1);
            pie.addSegment(seg, sf);


        }



        pie.getRenderer(PieRenderer.class).setStartDegs(75);
        pie.getRenderer(PieRenderer.class).setExtentDegs(150);

        pie.redraw();
        Log.d(TAG, "Drew Pie");


    }
    private Integer getSegmentFormatterColor(double[] d, double value) {
        double color = Color.BLUE;
        int j = 0;
        for(int i = 0; i < d.length; i++) {
            if(value <= d[i]) {
                j++;
            }
        }
        switch (j) {
            case 0:
                return Color.BLUE;
            case 1:
                return Color.GREEN;
            case 2:
                return Color.CYAN;
            case 3:
                return Color.YELLOW;
            case 4:
                return Color.RED;
        }
        return (int)color;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/ap_charcoal"
    android:orientation="horizontal"
    tools:context="pickleballsmarts.smartpaddle.MainActivity">

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="@color/ap_transparent"
        android:orientation="vertical"
        android:paddingTop="100dp">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Pickle Ball Time"
            android:textColor="@color/ap_white"
            android:textSize="36dp" />

        <Button
            android:id="@+id/btnStart"
            android:layout_width="match_parent"
            android:layout_height="71dp"
            android:elevation="0dp"
            android:text="Start"
            android:textSize="24sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/btnPauseResume"
            android:layout_width="match_parent"
            android:layout_height="71dp"
            android:text="Pause"
            android:textSize="24sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/btnStop"
            android:layout_width="match_parent"
            android:layout_height="71dp"
            android:text="Stop"
            android:textSize="24sp"
            android:textStyle="bold" />
    </LinearLayout>

    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="2"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingBottom="75dp"
            android:paddingLeft="200dp"
            android:paddingTop="100dp"
            app:srcCompat="@drawable/human" />

        <com.androidplot.pie.PieChart
            android:id="@+id/pieChart"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"

            app:renderMode="use_background_thread" />
    </RelativeLayout>

</LinearLayout>

Credits

Darren Herbst

1 project • 3 followers

Degreed electrical engineer and worked at John Deere for 3 years. I moved back to the family ranch/farm to design agriculture IoT systems.

Smart Pickleball Paddle

Things used in this project

Hardware components

Software apps and online services

Story

Custom parts and enclosures

Custom Enclosure For Sensor

Code

Main Activity Code in Android Studio

Android App XML File

Credits

Darren Herbst

Comments

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Smart Pickleball Paddle

Smart Pickleball Paddle

Things used in this project

Hardware components

Software apps and online services

Story

Custom parts and enclosures

Custom Enclosure For Sensor

Code

Main Activity Code in Android Studio

Android App XML File

Credits

Darren Herbst

Comments