Thank you very much @ESP_Sprite.
If I call ledcWrite(output_pin, 127) (given resolution is 8) only one time (probably in setup() or with an if check in loop()), the ESP32 board still constantly outputs the square wave pattern (of duty cycle ~50%), doesn't it, if I understand correctly?

So, what I'm ...

Hi everyone,

Previously, I followed this tutorial here ( https://www.hackster.io/mircemk/diy-cheap-and-super-simple-pemf-magnetic-therapy-device-bd972d ) to make a simple pulsed electromagnetic field therapy device. It has a Gaqqee PWM module (to generate the PWM signals), feeding to a ...