Question

我需要从fff2特征中获取价值。其特征仅返回01或00

如何获得价值？
this是我想要的示例值。

public boolean readCharacteristic(){

    //check mBluetoothGatt is available
    if (bluetoothGatt == null) {
        Log.e(TAG, "lost connection");
        return false;
    }
    BluetoothGattService Service = bluetoothGatt.getService(UUID.fromString("0000fff0-0000-1000-8000-00805f9b34fb"));
    if (Service == null) {
        Log.e(TAG, "service not found!");
        return false;
    }
    BluetoothGattCharacteristic charac = Service
            .getCharacteristic(UUID.fromString("0000fff2-0000-1000-8000-00805f9b34fb"));


    if (charac == null) {
        Log.e(TAG, "char not found!");
        return false;
    }
        final byte[] data = charac.getValue(); // return null
        String s2 = new String(data);

        Log.i("READ", s2);
        boolean status = true;

        return status;

}

感谢..

Answer 1

    public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {

        if (status == BluetoothGatt.GATT_SUCCESS) {
            byte[] data = characteristic.getValue();
        }
    }

如果需要，将字节数组转换为十六进制格式。希望这有用。

从Java上获取蓝牙低能量fff2特征的数组值

1 个答案: