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Bluetooth LE: implemented cycling cadence and speed sensors.

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Cadence is working while speed still requires the wheel size.
This commit is contained in:
Dennis Guse
2020-04-17 07:33:00 +02:00
parent bbe182cf82
commit ddb17f61cb
32 changed files with 1099 additions and 338 deletions
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src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java
+62 -4
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@@ -21,9 +21,13 @@ import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import androidx.annotation.NonNull;
import java.util.ArrayList;
import java.util.UUID;
import de.dennisguse.opentracks.content.sensor.SensorDataCycling;
/**
* Utilities for dealing with bluetooth devices.
*
@@ -31,11 +35,21 @@ import java.util.UUID;
*/
public class BluetoothUtils {
public static final UUID CLIENT_CHARACTERISTIC_CONFIG_UUID = new UUID(0x290200001000L, 0x800000805f9b34fbL);
public static final UUID HEART_RATE_SERVICE_UUID = new UUID(0x180D00001000L, 0x800000805f9b34fbL);
public static final UUID HEART_RATE_MEASUREMENT_CHAR_UUID = new UUID(0x2A3700001000L, 0x800000805f9b34fbL);
public static final UUID CYCLING_SPEED_CADENCE_SERVICE_UUID = new UUID(0x181600001000L, 0x800000805f9b34fbL);
public static final UUID CYCLING_SPPED_CADENCE_MEASUREMENT_CHAR_UUID = new UUID(0x2A5B00001000L, 0x800000805f9b34fbL);
private BluetoothUtils() {
}
/**
* If called from UI: use a background thread to get the default Bluetooth adapter.
* TODO Check if this is necessary.
*/
public static BluetoothAdapter getDefaultBluetoothAdapter(final String TAG) {
// If from the main application thread, return directly
if (Thread.currentThread().equals(Looper.getMainLooper().getThread())) {
@@ -77,12 +91,56 @@ public class BluetoothUtils {
return BluetoothUtils.getDefaultBluetoothAdapter(TAG) != null;
}
public static int parseHeartRate(BluetoothGattCharacteristic characteristic) {
public static Integer parseHeartRate(BluetoothGattCharacteristic characteristic) {
//DOCUMENTATION https://www.bluetooth.com/specifications/gatt/characteristics/
byte[] raw = characteristic.getValue();
int index = ((raw[0] & 0x1) == 1) ? 2 : 1;
int format = (index == 1) ? BluetoothGattCharacteristic.FORMAT_UINT8 : BluetoothGattCharacteristic.FORMAT_UINT16;
return characteristic.getIntValue(format, index);
if (raw.length == 0) {
return null;
}
boolean formatUINT16 = ((raw[0] & 0x1) == 1);
if (formatUINT16 && raw.length >= 3) {
return characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, 1);
}
if (!formatUINT16 && raw.length >= 2) {
return characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 1);
}
return null;
}
/**
* Documentation: https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=261449
*/
public static SensorDataCycling.CadenceAndSpeed parseCyclingCrankAndWheel(String address, String sensorName, @NonNull BluetoothGattCharacteristic characteristic) {
int valueLength = characteristic.getValue().length;
if (valueLength == 0) {
return null;
}
int flags = characteristic.getValue()[0];
boolean hasCrank = (flags & 0x01) > 0;
boolean hasWheel = (flags & 0x02) > 0;
SensorDataCycling.Cadence cadence = null;
int index = 1;
if (hasCrank && valueLength - index >= 6) {
long crankCount = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT32, index);
index += 4;
int crankTime = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index); // 1/1024s
index += 2;
cadence = new SensorDataCycling.Cadence(address, sensorName, crankCount, crankTime);
}
SensorDataCycling.Speed speed = null;
if (hasWheel && valueLength - index >= 4) {
int wheelCount = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index);
index += 2;
int wheelTime = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index); // 1/1024s
speed = new SensorDataCycling.Speed(address, sensorName, wheelCount, wheelTime);
}
return new SensorDataCycling.CadenceAndSpeed(address, sensorName, cadence, speed);
}
}