Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	DHT22 (AM2302)
Interface	Single-bus digital
Humidity Range	0-100% RH
Humidity Accuracy	±2% RH
Temperature Range	-40°C to 80°C
Temperature Accuracy	±0.5°C
Operating Voltage	3.3V - 6V DC
Sampling Period	2 seconds
Pin Count	4 Pins
Application	Arduino, Raspberry Pi, IoT Projects

6 reviews

Anonymous

Mar 28, 2026

Rating: 4/5

Good value, slow sampling

Great sensor for the price. Just remember it has a 2-second sampling rate, so don't expect instant updates if you are polling too fast. Otherwise, very reliable for indoor monitoring.

Anonymous

Mar 25, 2026

Rating: 5/5

Reliable and robust

I've bought five of these for different rooms in my house. They all calibrate quickly and provide stable data over WiFi to my home assistant dashboard. Highly recommended.

Anonymous

Mar 24, 2026

Rating: 3/5

Works but needed a pull-up resistor

The sensor itself is fine, but beginners should know you often need an external 10k pull-up resistor between the data and VCC pins for stable communication. My first attempt failed until I added one.

Anonymous

Mar 23, 2026

Rating: 5/5

Perfect for my weather station

This sensor works flawlessly with my Arduino project. The readings are consistent and much more accurate than the DHT11 I used previously. Setup was easy with the standard libraries.

Anonymous

Mar 20, 2026

Rating: 5/5

Essential for greenhouse automation

Using this to monitor humidity in my small greenhouse. It handles the moisture well and the temperature range is perfect for seasonal changes. Very happy with the purchase.

Anonymous

Mar 09, 2026

Rating: 4/5

Solid component for prototyping

Standard component for IoT prototypes. The module version with the PCB makes wiring much easier compared to the bare sensor. Delivery was fast and packaging was secure.

5 FAQ

Q: Which library should I use for Raspberry Pi?

A: For Raspberry Pi, we recommend using the Adafruit_CircuitPython_DHT library or the generic pigpio library for reliable reading via Python scripts.

Q: Does this come with a waterproof casing?

A: No, this module is not waterproof. If you plan to use it outdoors or in high-moisture environments, you will need to provide your own protective housing.

Q: How long is the cable included?

A: This item is sold as a standalone module without an attached cable. You will need to use jumper wires or solder headers to connect it to your microcontroller.

Q: What is the difference between DHT11 and DHT22?

A: The DHT22 offers better accuracy and a wider temperature and humidity range compared to the DHT11, though it has a slower sampling rate of 2 seconds versus 1 second.

Q: Is this compatible with 5V Arduino boards?

A: Yes, the module operates between 3.3V and 6V, so it is fully compatible with 5V Arduino boards like the Uno and Mega.

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