I'm developing Flutter app for Android, where I want to exchange some data between few instances of my app on different devices via Bluetooth. I'm using flutter_bluetooth_serial package (this is the only package I found which supports Bluetooth Classic, not Bluetooth Low Energy). I'm able to make connection
between device 1 and device 2 using BluetoothConnection.toAddress(device.address); (but even there was a problem, I had to modify the plugin and apply this workaround to make connection work).
Now I want to run my app on device 2 (which is connected with device 1) and send or receive some data, but I have no idea how I can do that using flutter_bluetooth_serial. In device 1 where I create connection I can use result of BluetoothConnection.toAddress(device.address) to send or listen for some data, but on device 2 I can't use it, because connection is already established by device 1 and I can't see another API for communication.
To simplify: let's say I want to achieve something more or less like Bluetooth chat functionality in this example application, but between multiple Flutter applications, not Flutter app and raspberry pi. Is there any way of solving it with use of flutter_bluetooth_serial or any other package? Or I have to write some native Android code?