I bought HobbyWing SKYWALKER 20A esc, 2300KV brushless motor when I connected everything
don't work and beep every 1 second I tried to calibrate but failed what can I do
I've never used an esc before, so this may be nonsense, but I recall reading somewhere that you need to send them a certain sequence to arm them first.
An Electronic Speed Control (ESC), used in radio-controlled models, is typically controlled with the same pulse width modulation (1000 microseconds for MIN and 2000 microseconds for MAX, repeat about 50 Hz) as a hobby servo. For those ESC's, the Servo library is a good source of control pulses.