DHT11 basic temperature-humidity sensor + extras

The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.

Simply connect the first pin on left to 3-5v power, second your data input and right most to ground. Although it uses a single-wire to communicate it is not dallas one wire compatible! If you want multiple sensors, each sensor must have its own pin on the micro controller!
We have written an Arduino library with example code