AM2302 (wired DHT22) temperature-humidity sensor
The AM2302 is the wired version of the popular DHT22 temperature and humidity sensor, housed in a large plastic enclosure with colour-coded lead wires. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, outputting a digital signal on a single data pin — no analog input pins required.
Simply connect the red wire to 3–5V power, the yellow wire to your data input pin, and the black wire to ground. A built-in 5.1K pull-up resistor between VCC and DATA means no additional external resistors are needed. More precise and accurate than the DHT11, the AM2302 works across a wider temperature and humidity range.
Key Features
- Digital Output – Single-wire digital signal, no analog pins needed
- Built-In Pull-Up Resistor – 5.1K resistor included, no external pull-ups required
- 3–5V Compatible – Works with both 3.3V and 5V microcontrollers
- Wired Enclosed Design – Colour-coded wires (red, yellow, black) for easy connection
- Higher Accuracy than DHT11 – More precise readings across a wider range
Specifications
- Sensor Type – Capacitive humidity sensor + thermistor
- Supply Voltage – 3V to 5V
- Interface – Single-wire digital (not Dallas One Wire compatible)
- Sampling Rate – Once every 2 seconds
- Internal Pull-Up – 5.1K resistor (VCC to DATA)
Note: This sensor uses a proprietary single-wire protocol and is not Dallas One Wire compatible. Each sensor requires its own dedicated data pin — they cannot share a bus.
Package Contents
- 1× AM2302 (Wired DHT22) Temperature and Humidity Sensor
Resources
The AM2302 (wired DHT22) temperature-humidity sensor appears in the following collections:
SKU AF-393
by Adafruit
