I was reading about sensors and discover that dht22 needs a normal GPIO ( input and output) because this sensor has a pritocol to comunicate with esp32.

I have a problem when try to use GPIO INPUT ONLY pins. I'm using DHT22 to do some tests in Esp32 boards. When I use GPIO normal pins I have correct informatios in serial monitor. But when I use pins INPUT ONLY all informations about temperature and humidity are ZERO. I tryed to use a pullup resistor...