Description
Reviews
| 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 |
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.
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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