如果BLE CSC服务不总是被检测到,可能是由于不正确的设置引起的。以下是一些可能的解决方法,包括代码示例:
// 定义BLE CSC服务的UUID
private static final UUID CSC_SERVICE_UUID = UUID.fromString("00001816-0000-1000-8000-00805f9b34fb");
// 定义CSC特征值的UUID
private static final UUID CSC_MEASUREMENT_UUID = UUID.fromString("00002a5b-0000-1000-8000-00805f9b34fb");
// 设置BLE CSC服务和特征值
BluetoothGattService cscService = new BluetoothGattService(CSC_SERVICE_UUID, BluetoothGattService.SERVICE_TYPE_PRIMARY);
BluetoothGattCharacteristic cscMeasurementCharacteristic = new BluetoothGattCharacteristic(CSC_MEASUREMENT_UUID, BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY, BluetoothGattCharacteristic.PERMISSION_READ);
cscService.addCharacteristic(cscMeasurementCharacteristic);
// 启用BLE CSC服务的广播
AdvertiseSettings settings = new AdvertiseSettings.Builder()
.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_POWER)
.setConnectable(true)
.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_LOW)
.build();
ParcelUuid cscServiceUuid = new ParcelUuid(CSC_SERVICE_UUID);
AdvertiseData data = new AdvertiseData.Builder()
.setIncludeDeviceName(false)
.addServiceUuid(cscServiceUuid)
.build();
BluetoothLeAdvertiser advertiser = bluetoothAdapter.getBluetoothLeAdvertiser();
advertiser.startAdvertising(settings, data, advertiseCallback);
// 设置BLE CSC服务的属性
BluetoothGattCharacteristic cscMeasurementCharacteristic = cscService.getCharacteristic(CSC_MEASUREMENT_UUID);
cscMeasurementCharacteristic.setProperties(BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY);
cscMeasurementCharacteristic.setPermission(BluetoothGattCharacteristic.PERMISSION_READ);
通过确保正确设置BLE CSC服务的UUID、启用正确的广播以及正确设置属性,应该能够解决BLE CSC服务不总是被检测到的问题。