Bluetooth: rename to BluetoothHandlers.

2023-11-05 15:34:02 +01:00
parent f2594371d3
commit 15f3ccbcbd
14 changed files with 43 additions and 43 deletions
@@ -0,0 +1,86 @@
+package de.dennisguse.opentracks.sensors;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
+import java.util.List;
+import java.util.UUID;
+
+import de.dennisguse.opentracks.data.models.Power;
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataCyclingCadence;
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataCyclingPower;
+import de.dennisguse.opentracks.sensors.sensorData.SensorHandlerInterface;
+
+public class BluetoothHandlerManagerCyclingPower implements SensorHandlerInterface {
+
+    public static final ServiceMeasurementUUID CYCLING_POWER = new ServiceMeasurementUUID(
+            new UUID(0x181800001000L, 0x800000805f9b34fbL),
+            new UUID(0x2A6300001000L, 0x800000805f9b34fbL)
+    );
+
+    @Override
+    public List<ServiceMeasurementUUID> getServices() {
+        return List.of(CYCLING_POWER);
+    }
+
+    @Override
+    public SensorDataCyclingPower createEmptySensorData(String address) {
+        return new SensorDataCyclingPower(address);
+    }
+
+    @Override
+    public void handlePayload(SensorManager.SensorDataChangedObserver observer, @NonNull ServiceMeasurementUUID serviceMeasurementUUID, String sensorName, String address, BluetoothGattCharacteristic characteristic) {
+        SensorDataCyclingPower.Data cyclingPower = parseCyclingPower(address, sensorName, characteristic);
+
+        if (cyclingPower != null) {
+            observer.onChange(cyclingPower.power());
+        }
+    }
+
+
+    @VisibleForTesting
+    public static SensorDataCyclingPower.Data parseCyclingPower(String address, String sensorName, BluetoothGattCharacteristic characteristic) {
+        // DOCUMENTATION https://www.bluetooth.com/wp-content/uploads/Sitecore-Media-Library/Gatt/Xml/Characteristics/org.bluetooth.characteristic.cycling_power_measurement.xml
+        int valueLength = characteristic.getValue().length;
+        if (valueLength == 0) {
+            return null;
+        }
+
+        int index = 0;
+        int flags1 = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, index++);
+        int flags2 = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, index++);
+        boolean hasPedalPowerBalance = (flags1 & 0x01) > 0;
+        boolean hasAccumulatedTorque = (flags1 & 0x04) > 0;
+        boolean hasWheel = (flags1 & 16) > 0;
+        boolean hasCrank = (flags1 & 32) > 0;
+
+        Integer instantaneousPower = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_SINT16, index);
+        index += 2;
+
+        if (hasPedalPowerBalance) {
+            index += 1;
+        }
+        if (hasAccumulatedTorque) {
+            index += 2;
+        }
+        if (hasWheel) {
+            index += 2 + 2;
+        }
+
+        SensorDataCyclingCadence cadence = null;
+        if (hasCrank && valueLength - index >= 4) {
+            long crankCount = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index);
+            index += 2;
+
+            int crankTime = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index); // 1/1024s
+
+            cadence = new SensorDataCyclingCadence(address, sensorName, crankCount, crankTime);
+        }
+
+
+        return new SensorDataCyclingPower.Data(new SensorDataCyclingPower(sensorName, address, Power.of(instantaneousPower)), cadence);
+    }
+
+}