As suggested by the tec support in this post, I tried to plug a 12V and 5,4A adapter to my Starter Kit to check if the Bluetooth problems experienced were due to a low voltage from the batteries.
I'm not experieced problems with the Bluetooth now,
one of the motor doesn't work. I switched the cable and I saw that the problem is not in the motor, not even in the connection cable, it seems that the problem lays in the pins on the board.
The port that seems faulty is the Motor 1
I tried this short program connected via USB
and only the m2 is moving.
Could the overvoltage or over amperage ruined the board?
How can I check'