DHT11 – Humidity and Temperature Sensor for Arduino and Raspberry Pi B/B+/Raspberry Pi 2.

The four-pin device uses a 1-wire protocol. It’s a snap to connect to your project, requiring VCC, GND, and a pull-up resistor on the single data line. We’ve already seen it used on at least one project, and hope to see more of this little guy in your own hacks.

Specification:

• Dimension 28mm*12mm*10mm

• Main chip DHT11 humidity sensor

• Voltage: DC 5V

• Digital output

• Humidity Range: 20—90%RH

• Humidity  accuracy: ±5%RH

• Temperature range: 0—60℃

• Temperature accuracy: ±2℃

• Temperature and humidity measurements are a nice addition to many hobby projects.

Datasheet:

        akizukidenshi.com/download/ds/aosong/DHT11.pdf