Is there a way for me to have unity send integer of the speed of rotation of the player in vr as well as the degree in which the player rotate (cc or ccw). What I am trying to do is have the player in the vr game rotate ccw or cw depend on the speed of rotation and then have that data sent to Arduino. Where a brushless motor would then be engage by the Arduino with a max speed of 10 rpm or 60 deg/sec. So, if the player is rotating slowly, then the Arduino would tell the motor to ramp up slowly equal to the maximum speed of the player rotation but not exceeding 10 rpm or 60 deg/sec.
Definitely start in the Arduino forums because I would bet almost nobody here using Unity does anything with the serial ports or external hardware, just based on the observations of users here.