Connecting to a DHTxx Sensor

Luckily it is trivial to connect to these sensors, they have fairly long 0.1"-pitch pins so you can plug them into any breadboard, perfboard or similar.

Likewise, it is fairly easy to connect up to the DHT sensors. They have four pins

  • VCC (3 to 5V power)
  • Data out
  • Not connected
  • Ground

Simply ignore pin 3, its not used. You will want to place a 10K resistor between VCC and the data pin, to act as a medium-strength pull up on the data line. The Arduino has built in pullups you can turn on but they're very weak, about 20-50K

This diagram shows how we will connect for the testing sketch. Connect data to pin 2, you can change it later to any pin.

Last updated on 2015-11-19 at 06.36.50 PM Published on 2012-07-29 at 11.58.38 AM