Attributes

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

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Essential for greenhouse monitoring

I bought five of these for my automated greenhouse system. They handle the high humidity environment perfectly without drifting. Very satisfied with the build quality.

Anonymous

Mar 30, 2026

Rating: 5/5

Reliable and robust

Used this in a final year university project. It survived months of continuous operation inside a 3D printer enclosure. Data logging was smooth and error-free.

Anonymous

Mar 27, 2026

Rating: 5/5

Great value for money

Arrived quickly and well-packaged. The pins are pre-soldered which saved me some time. Integration with ESP32 was straightforward using standard libraries.

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for my weather station

This DHT22 module works flawlessly with my Arduino setup. The readings are consistent and much more stable than the cheaper DHT11 I used before. Highly recommended for outdoor projects.

Anonymous

Mar 17, 2026

Rating: 3/5

Works but needed a pull-up resistor

The sensor itself is fine, but beginners should know you might need an external 10k pull-up resistor depending on your board. My initial readings were erratic until I added one.

Anonymous

Mar 04, 2026

Rating: 4/5

Good accuracy, slow sampling

The sensor is very accurate compared to my professional hygrometer. Just remember it has a 2-second sampling rate, so don't expect instant updates in your code loop.

5 FAQ

Q: Can this sensor be used outdoors in the rain?

A: The sensor module itself is not waterproof. For outdoor use, please house it in a ventilated waterproof enclosure to protect the electronics while allowing air flow.

Q: Does this come with a library for Python?

A: While we do not provide proprietary software, the DHT22 is widely supported by community libraries such as Adafruit_CircuitPython_DHT for Raspberry Pi and other platforms.

Q: Is this module compatible with 5V logic levels?

A: Yes, the DHT22 operates between 3.3V and 6V, making it fully compatible with both 3.3V and 5V microcontrollers like Arduino Uno and Raspberry Pi.

Q: What is the maximum cable length recommended for this sensor?

A: For reliable data transmission, we recommend keeping the cable length under 20 meters. For longer distances, shielded cables or signal boosters may be required.

Q: Why am I getting NaN values in my serial monitor?

A: NaN values usually indicate a wiring issue or missing pull-up resistor. Please check your connections and ensure a 10k resistor is placed between the data pin and VCC.

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