Firmata and M0 Pro Communication Problem

Dear all,

I have developed and Android app to communicate between Android phone and Arduino using Firmata. There is a bar in the Android app which adjusts the rpm of a motor. The app works fine with Arduino Uno and Arduino Mega 2560.

However, there seems to be something wrong when I want to use it the app with M0 Pro. The rx pin is not on, and I am not able to change the rpm of the motor. When I look at the Boards.h file it says

// Note this will work with an Arduino Zero Pro, but not with an Arduino M0 Pro
// Arduino M0 Pro does not properly map pins to the board labeled pin numbers.

Do you know how can I solve the issue? Does anyone use Firmata with M0 Pro? Thanks in advance.