Arduino requesting state

Support
1

arduino

If I make a t, p or q command over the arduino mega it produces this requesting state sequence and the board beeps every few minutes and a motor moves. I am not able to control the motors in real time with the arduino.
I am just running the arduino odrive test code unmodified.

2

In Arduino Mega, only following can be used for RX 10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62), A9(63), A10(64), A11(65), A12(66), A13(67), A14(68), A15(69). Arduino SoftwareSerial can be helped