Command? No. they send 3 * 5v signals, enable, step and direction. And enabling it without moving it is normal.
I suspect you plugged the endstop into + and -... creating an instant short.. But that should be 5v...
The symptoms are like you crossed the 12v onto the 5v line, that would kill the mega and the pololus almost instantly.
I suspect you plugged the endstop into + and -... creating an instant short.. But that should be 5v...
The symptoms are like you crossed the 12v onto the 5v line, that would kill the mega and the pololus almost instantly.