Arming A Brushless Motor Controller Connected to ESP8266
The &quot;PWM&quot; used in equipment for radio controlled models , is not actually true PWM where pulses are sent at a fixed frequency with an on-time proportional to the off-time betweeh 0% and 100%.
The &quot;PWM&quot; used in RC is actually a a pulse that varies between 1-2ms in width. So for 0%-100% it would be 1-2ms. But if it's -100%-100% then it would still be 1-2ms, except that 1.5ms would be considered 0%. It's not reading the ratio between on time and off time. It is literally measuring how long each pulse is high remains.
The pulse frequency can be pretty sloppy too. It just has to be sent often enough so that analog equipment power pulses frequently enough to hold position (like an analog servo) or frequently enough so the digital equipment (like an ESC or digital servo) does not think the radio signal has been lost.