DHT22 and SCD40 Sensors

[esskay]

Greetings, Please advise as to what pins to use for a DHT22 Temp/Humidity sensor as well as an SCD40 Temp/Humidity/CO2 sensor.

Appreciated.

[admin]

DHT22 use by 1-wire interface, you can chose any free gpio from ESP32, just need include pull up resistance.
another sensor, from image, there is a i2c bus device, you need connect to ESP32 i2c bus.

[twostar]

A note to the OP, a lot of DHT22's have built-in pullups so you don't need to add them yourself. There's a discussion on this in another thread that I can't find right now.

[admin]

We recommend using the DHT22 original sensor.