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
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.