The the rtc_gpio_set_level(PUMP_1_PIN, pump1_state) in line 44 only gets set in abought 80% of cases. Once ulp_run(ulp_program_start_pos); (line 93) is commented out, i.e., the ULP progrum is not started, the problem goes away. I used plafromIO and Espressif ESP32 Dev Module under the Arduino framew...

Hello @aliasthefourth yes, I did something like that using ULP to toggle a pin on and off. Even though the example is for an M5Stack device I think it should be transferable to any ESP32 board. https://community.m5stack.com/topic/596/display-on-during-deep-sleep/16 Thanks Felix Thanks Felix, With o...

Does anybody know if it is possible to have RTC pins perform pulse width modulation in deep sleep?