Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | DHT22 / AM2302 |
| Operating Voltage | 3.3V - 6V DC |
| Temperature Range | -40°C to +80°C |
| Humidity Range | 0% to 100% RH |
| Temperature Accuracy | ±0.5°C |
| Humidity Accuracy | ±2% RH |
| Sampling Period | 2 seconds |
| Interface Type | Single-wire Digital |
| Board Compatibility | Arduino, Raspberry Pi, ESP32 |
| Package Includes | 1x DHT22 Sensor Module with PCB |
Anonymous
Mar 31, 2026
Rating: 4/5
Good value for money
Works as described for my university project. The only minor issue is that the pins are slightly thin, so be careful when inserting them into a breadboard to avoid bending.
Anonymous
Mar 30, 2026
Rating: 5/5
Perfect for Arduino Projects
This module works flawlessly with my Arduino Uno. The library integration was seamless, and the readings are consistent compared to my calibrated hygrometer. Highly recommended for hobbyists.
Anonymous
Mar 29, 2026
Rating: 5/5
Essential component for IoT
Integrated this with an ESP8266 for a smart home dashboard. The digital signal is clean, and I haven't experienced any data corruption over long wires. Excellent product.
Anonymous
Mar 23, 2026
Rating: 4/5
Great for monitoring greenhouse conditions
I used this to monitor humidity in my small indoor greenhouse. It's accurate enough for plant care. Just make sure you add a pull-up resistor if you are building your own circuit, though this board has one built-in.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable and Fast Shipping
Arrived quickly and well-packaged. The sensor responds within the expected 2-second interval. Data output is stable and doesn't fluctuate wildly like cheaper alternatives I've tried.
Anonymous
Mar 13, 2026
Rating: 5/5
Better than the DHT11
Upgraded from the DHT11 and the difference in precision is noticeable, especially in the humidity readings. The temperature accuracy is also much better for scientific logging projects.
Q: Which library should I use for reading data on Arduino?
A: The most popular and reliable library is the 'DHT sensor library' by Adafruit, available directly in the Arduino Library Manager. It supports both DHT11 and DHT22 models.
Q: What is the maximum cable length recommended for reliable data transmission?
A: For best results, we recommend keeping the cable length under 20 meters. If you need longer distances, consider using a shielded cable or a signal buffer.
Q: Does this module come with a pull-up resistor already installed?
A: Yes, the Risym DHT22 module includes a built-in 10k pull-up resistor on the data line, so you can connect it directly to your microcontroller without extra components.
Q: Can I use this sensor outdoors in the rain?
A: The sensor element itself is not waterproof. While the PCB is durable, you must house the module in a weatherproof enclosure with ventilation if using it outdoors to prevent water damage.
Q: Is this compatible with 5V logic systems like the standard Arduino Uno?
A: Absolutely. While the sensor operates between 3.3V and 6V, it is fully compatible with 5V logic systems such as the Arduino Uno, Mega, and Nano.
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