AM2302 Sensor

Information

The AM2302 is a wired version of the DHT22, in a large plastic body. It is a basic, 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 red 3-5V power, the yellow wire to your data input pin and the black wire to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin.

There is a 5.1K resistor inside the sensor connecting VCC and DATA so you do not need any additional pull-up resistors

Warning

As these sensors are cheap, they are not stable for 24/7 duty. After a few days they tend to give problems. Use at your own risk! Using DHT11 / DHT11 on Raspberry Pi 4b #470

Setup

In order to use the AM2302 Sensor use the following settings:

Mandatory

Hardware

AM2302 Sensor

Types : humidity, temperature

Address

Enter the physical pin number on which the device is connected
Ex: 27 This sensor does support (power management)

Other settings can be found at the sensor setup information