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Code Issues 1 Packages Projects Releases Wiki Activity

cycling-sensor: added average RPM calculation

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This commit is contained in:
Daniel Dakhno 2022-02-14 10:34:00 +01:00
parent 5a690b9119
commit 3da4b08e91
3 changed files with 43 additions and 1 deletions
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8
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/cycling/GenericCyclingSensorSupport.java
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@ -6,6 +6,7 @@ import android.bluetooth.BluetoothGattCharacteristic;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.Uri;
import android.util.Log;
import android.widget.Toast;
import org.slf4j.LoggerFactory;
@ -28,6 +29,7 @@ import nodomain.freeyourgadget.gadgetbridge.model.WeatherSpec;
import nodomain.freeyourgadget.gadgetbridge.service.btle.AbstractBTLEDeviceSupport;
import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.SetDeviceStateAction;
import nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.data.AverageCalculator;
import nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.data.DataAccumulator;
import nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.protocol.CSCMeasurement;
import nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.protocol.CSCProtocol;
@ -36,6 +38,7 @@ import nodomain.freeyourgadget.gadgetbridge.util.GB;
public class GenericCyclingSensorSupport extends AbstractBTLEDeviceSupport {
public static String UUID_CSC_MESAUREMENT = "00002a5b-0000-1000-8000-00805f9b34fb";
final int AVERAGE_CALCULATION_MIN_TIME_UNITS = 1024 * 3; // a bit more than 3 seconds since sensor counts a seconds in 1024 units
private static final String TAG = "GenericCyclingSensorSup";
private int wheelCircumference;
private int saveIntervalMinutes;
@ -44,6 +47,7 @@ public class GenericCyclingSensorSupport extends AbstractBTLEDeviceSupport {
private CSCProtocol protocol;
private DataAccumulator accumulator;
private AverageCalculator averageCalculator;
public GenericCyclingSensorSupport() {
super(LoggerFactory.getLogger(GenericCyclingSensorSupport.class));
@ -51,6 +55,7 @@ public class GenericCyclingSensorSupport extends AbstractBTLEDeviceSupport {
protocol = new CSCProtocol();
accumulator = new DataAccumulator();
averageCalculator = new AverageCalculator(accumulator);
}
private void loadPrefs(){
@ -87,6 +92,9 @@ public class GenericCyclingSensorSupport extends AbstractBTLEDeviceSupport {
long timeOfArrival = System.currentTimeMillis();
CSCMeasurement measurement = protocol.parsePacket(timeOfArrival, value);
accumulator.captureCSCMeasurement(measurement);
double rpm = averageCalculator.calculateAverageRevolutionsPerSecond(3000);
Log.d(TAG, "handleMeasurement: " + rpm);
}
@Override

34
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/cycling/data/AverageCalculator.java Normal file
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@ -0,0 +1,34 @@
package nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.data;
import nodomain.freeyourgadget.gadgetbridge.service.devices.cycling.protocol.CSCMeasurement;
public class AverageCalculator {
private final DataAccumulator accumulator;
public AverageCalculator(DataAccumulator accumulator) {
this.accumulator = accumulator;
}
public double calculateAverageRevolutionsPerSecond(long timeSpan){
return calculateAverageRevolutionsPerSecond(accumulator.getMeasurementsInTimeSpan(timeSpan));
}
public static double calculateAverageRevolutionsPerSecond(CSCMeasurement[] measurements){
CSCMeasurement lastMeasurement = measurements[0];
CSCMeasurement firstMeasurement = measurements[measurements.length - 1];
long timeUnitsDelta = lastMeasurement.lastWheelRevolutionTime - firstMeasurement.lastWheelRevolutionTime;
if(timeUnitsDelta == 0){
return 0;
}
while(timeUnitsDelta < 0){
timeUnitsDelta += 1024 * 64;
}
int rotationsDelta = lastMeasurement.wheelRevolutions - firstMeasurement.wheelRevolutions;
double factor = 1024;
double rotationsPerTimeUnit = (double)rotationsDelta / timeUnitsDelta;
double rotationsPerSecond = rotationsPerTimeUnit * factor;
return rotationsPerSecond;
}
}

2
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/cycling/data/DataAccumulator.java
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@ -25,7 +25,7 @@ public class DataAccumulator {
public CSCMeasurement[] getMeasurementsInTimeSpan(long timespanMillis) throws NotEnoughMeasurementsException{
int listSize = 1;
int accumulatedTimeDelta = 0;
for(int i = measurements.size() - 2; i > 0; i--){
for(int i = measurements.size() - 1; i > 0; i--){
CSCMeasurement previousMeasurement;
CSCMeasurement currentMeasurement;
try{