adc2_vref_to_gpio cause 3.6V on GPIO pin - ESP32 Forum
status = adc2_vref_to_gpio(GPIO_NUM_27);if(status == ESP_OK){printf("v_ref routed to GPIO\n"); }else{printf("failed to route v_ref\n"); } to measure Vref on GPIO 25-27. I got 3.6V on multimeter. What's wrong with that?