Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | DHT22 / AM2302 |
| Measurement Range (Temperature) | -40°C to +80°C |
| Measurement Range (Humidity) | 0% to 100% RH |
| Accuracy (Temperature) | ±0.5°C |
| Accuracy (Humidity) | ±2% RH |
| Resolution | 0.1°C / 0.1% RH |
| Operating Voltage | 3.3V to 6V DC |
| Sampling Period | 2 seconds |
| Interface | Single-wire Digital |
| Package Type | PCB Module with Mounting Holes |
Anonymous
Mar 29, 2026
Rating: 4/5
Reliable for Plant Monitoring
I used three of these to monitor my indoor garden. They handle the humidity well, though you need to wait 2 seconds between reads as specified. Very satisfied overall.
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for Arduino Projects
This sensor works flawlessly with my Arduino Uno. The readings are stable and match my reference thermometer closely. Great value for the price.
Anonymous
Mar 19, 2026
Rating: 5/5
Solid Performance
Running this inside a 3D printed enclosure for my home automation system. No drift observed over two weeks of continuous operation. Highly recommend for hobbyists.
Anonymous
Mar 16, 2026
Rating: 4/5
Good for University Projects
Bought this for a final year project. It provides consistent data logs. Just make sure you use a pull-up resistor if your board doesn't have one built-in on the data line.
Anonymous
Mar 03, 2026
Rating: 5/5
Easy to Integrate
The library support for this module is excellent. I had it up and running on my ESP32 in under 10 minutes. Data accuracy seems spot on for general environmental monitoring.
Anonymous
Mar 01, 2026
Rating: 5/5
Better than the DHT11
Upgraded from the blue DHT11 sensors and the difference in precision is noticeable immediately. The wider temperature range is exactly what I needed for my weather station project.
Q: Does this module come with a pull-up resistor installed?
A: Yes, most PCB modules include a 10k pull-up resistor on the data line, making it ready to use without extra components.
Q: Is this compatible with Raspberry Pi GPIO pins?
A: Yes, it is fully compatible with Raspberry Pi. Since the Pi uses 3.3V logic and the sensor operates up to 6V, it connects directly without level shifters.
Q: What is the maximum cable length recommended for accurate readings?
A: For reliable digital signal transmission, we recommend keeping the cable length under 20 meters. Using shielded cable is advised for longer distances.
Q: How often can I request a new reading from the sensor?
A: The DHT22 has a sampling rate of 0.5Hz, meaning you should wait at least 2 seconds between consecutive data requests to avoid communication errors.
Q: Can I use this sensor outdoors in the rain?
A: The sensor itself is not waterproof. While the PCB module offers some protection, we recommend placing it inside a ventilated waterproof enclosure for outdoor use.
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