Electronic Brick - DHT11 Digital Humidity and Temperature Sensor
This brick contains DHT11 is a digital temperature and humidity sensor. Like most "bricks" in the Electronic Brick series, there are two types of three pin connectors that can be used: The 3pin DuPont or the 3pin XH2.54. In both cases the 3 pins are GROUND, Vcc (3.3V-5VDC) and SIGNAL. The SIGNAL pin connects into any Arduino digital input.