ESP32-BLDC-Motor-Calibration-and-Rotation-Test At first dont connect the battery . Connect the ESP32 and motor pwm pins. And connect ESP32 with the PC. open arduino ide and select baud rate 500000. Provide 2000 micro-seconds by sending 'z' in the serial monitor. Then connect the battery. And wait to here the beep sound from the ESC. Then Provide 1000 micro-seconds by sending 'a' in the serial monitor. Wait to hear the beep- beep- beep sound. Work done. Send 'p' to test the motor rotation. and 'a' to stop the motor.