I have a Pixhawk Pro. I tried to calibrate using it but the ESC never goes into calibration mode(no beeps, only when I press the switch to arm). I tried everything, test motors, calibration, etc…
To be sure that I was not doing something wrong, first I tested it with a small drone and works perfectly.
I’m using the FREERCHOBBY ESC (DC 50－100V, Max input supply voltage: DC100V, Lipos：12-24S):
datasheet_ESC.pdf (81.7 KB)
And I measure the main PWM OUT1 and It’s seems to be ok:
do you have any ideas?