fit linear function to the transferfunction measurements, data seem to fit very well onto line but due to wrong offset the digitizers can't measure voltages below 1v
both channels work with the mirror
measure response of the mirror to step function
automatically choose between /dev/ttyACM0 and /dev/ttyACM1 because arduino often switches
added micros() function to acquire how mirror moves when doing one step
the trajectory of the mirror is very repeatable
scan several different trajectories