ESP32 Forum

i connected the ultrasonic sensor to the 3.3 vcc and ground and the trig and echo pins to GPIO22,1 when i connect the sensor i get MD5 error:"A fatal error occurred: MD5 of file does not match data in flash!"
any help will be greatly appriciated

To which GPIOs did you say you have that sensor connected? 22 makes sense, but 1 is (iirc) txd, so you likely would get interference with your serial port on that pin. Are you sure it's GPIO1?