Description

The DHT22 is a basic digital temperature and humidity sensor. The sensor uses the same internals as the AM2302, but sits in a much more compact, breadboard friendly package. 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 sensor is accurate to +/- 0.5°C and +/- 2% relative humidity. This version is breadboard compatible and works well with the Arduino, Raspberry Pi, and just about anything else with a digital I/O pin available.

We recommend a 5.1K Ohm pull up resistor between the power and output line on this sensor to ensure nice, stable communication.

Features

• Temperature Accuracy: +/- 0.5°C
• Temperature Range: -40 - 80°C
• Temperature Resolution: 0.1°C
• Max Current: 2.5mA
• Voltage: 3 - 5VDC
• Relative Humidity Accuracy: +/- 2%
• Relative Humidity Resolution: 0.1%
• Sample Rate: 0.5Hz (once every 2 seconds)
• Size: 15.3 x 26 x 7.7mm / 0.6 x 1 x 0.3"
• Breadboard friendly

Package Contents

• 1 x DHT22 Temperature / Humidity Sensor

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