[Flutter] Data Transfer using BLE among Flutter app & ESP32 (flutter_blue_plus)

I'm a newbie to Flutter and do want a simple functionality wherein I want to be able to send some data to the ESP32 after establishing the communication successfully, As of now, I can connect to the ESP32 without any issues, but I can't figure out how to get it to send data to the ESP32.

Future<bool> connectToDevice(String bleAddress) async {
try {
// Create a BluetoothDevice instance using the BLE address
final device = BluetoothDevice(remoteId: DeviceIdentifier(bleAddress));

await device.connect();
print('Connected to $bleAddress');

return true;
} catch (e) {
print('Error connecting to device: $e');
return false;
}
}


I'm connecting to devices using their Bluetooth Address & it seems to work just fine, (I've added log statements on the ESP to display when a connection is established) but I'm not sure about sending the data , can someone explain how this can be done.

• I've checked my ESP32's functionality part using a BLE Scanner , also sending the data so there are no issues on the receiving end.

Continue reading...