[Help]: Not able to write to the bluetooth device in Xiaomi phone

[huubao2309]

Requirements

• [X] I've looked at the README 'Common Problems' section

Have you checked this problem on the example app?

Yes

FlutterBluePlus Version

1.30.3

Flutter Version

3.13.9

What OS?

Android

OS Version

Android 12

Bluetooth Module

LoRa Wireless Stick Lite V3 /433/470-510/863/868-915/928 Hz ESP32 Lora Development Board SX1276 ESP32-PICO-D4 Esp32

What is your problem?

Not able to write to the Bluetooth device in Xiaomi phone (Redmi Note 11) Note: On iOS, the problem does not occur.

Logs

FlutterBluePlusException | writeCharacteristic | android-code: 19 | UNKNOWN_GATT_ERROR (19)

Code

    final List<BluetoothService> services = await device.discoverServices();
    for (final BluetoothService service in services) {
      // Reads all characteristics
      final List<BluetoothCharacteristic> characteristics =
          service.characteristics;
      for (final BluetoothCharacteristic c in characteristics) {
        if (c.properties.write) {
          // Writes to a characteristic
          await c.write(data); // <--- Cannot write value
        }
      }
    }

[chipweinberger]

what is the characteristic uuid causing the error?

ios automatically hides some of the system characteristics

[chipweinberger]

closing due to inactivity. cannot help you without more details.