BLEDeviceConnection.kt

private val callback = object: BluetoothGattCallback() {
    
    ...
    
    @Deprecated("Deprecated in Java")
    override fun onCharacteristicRead(
        gatt: BluetoothGatt,
        characteristic: BluetoothGattCharacteristic,
        status: Int
    ) {
        super.onCharacteristicRead(gatt, characteristic, status)
        if (characteristic.uuid == myCharacteristicUUID) {
            Log.v("bluetooth", String(characteristic.value))
        }
    }
}
    
@RequiresPermission(PERMISSION_BLUETOOTH_CONNECT)
fun readCharacteristic(serviceUUID: UUID, characteristicUUID: UUID) {
    val service = gatt?.getService(serviceUUID)
    val characteristic = service?.getCharacteristic(characteristicUUID)
    
    if (characteristic != null) {
        val success = gatt?.readCharacteristic(characteristic)
        Log.v("bluetooth", "Read status: $success")
    }
}