Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | DHT22 / AM2302 |
| Measurement Range (Humidity) | 0-100% RH |
| Measurement Range (Temperature) | -40°C to 80°C |
| Accuracy (Humidity) | ±2% RH |
| Accuracy (Temperature) | ±0.5°C |
| Resolution | 0.1% RH / 0.1°C |
| Operating Voltage | 3.3V - 6.0V DC |
| Sampling Period | 2 seconds |
| Interface | Single-wire Digital |
| Package Type | Module with PCB and Pull-up Resistor |
Anonymous
Mar 31, 2026
Rating: 5/5
Reliable and Easy to Code
Integrated easily into my ESP32 home automation system. The library support is widespread, making the coding process trivial. Data consistency is impressive over the last three weeks of continuous operation.
Anonymous
Mar 12, 2026
Rating: 4/5
Solid performance
Using it to trigger my dehumidifier automatically. The threshold detection is reliable. Only minor issue is that the pins are slightly close together, so be careful when plugging in jumper wires.
Anonymous
Mar 07, 2026
Rating: 4/5
Good accuracy for the price
I am using this to monitor my greenhouse environment. It handles the humidity well, though I noticed a slight lag when temperature changes rapidly. For the cost, it is an excellent value.
Anonymous
Mar 06, 2026
Rating: 3/5
Works but slow sampling
The sensor is accurate, but remember it has a 2-second sampling rate. If you need fast real-time data for rapid fluctuations, this isn't the right choice. For general environmental logging, it is fine.
Anonymous
Mar 04, 2026
Rating: 5/5
Perfect for Arduino Projects
This sensor works flawlessly with my Arduino Uno. The readings are stable and match my calibrated hygrometer very closely. The module version is great because it includes the pull-up resistor, saving me time on wiring.
Anonymous
Mar 01, 2026
Rating: 5/5
Great for university projects
Bought this for my final year engineering project. It survived months of testing in various conditions. The build quality of the module feels sturdy compared to the bare component versions.
Q: How often does the sensor update the data?
A: The DHT22 has a sampling period of 2 seconds. It cannot provide new data faster than this interval; requesting data more frequently may result in reading errors or stale data.
Q: Can this sensor be used outdoors in the rain?
A: The sensor probe itself is somewhat resistant to humidity, but the PCB and electronic components are not waterproof. You must house it in a weatherproof enclosure with ventilation for outdoor use.
Q: Does this module come with a pull-up resistor installed?
A: Yes, this PCB module includes a built-in pull-up resistor, so you can connect it directly to your microcontroller without needing external components.
Q: What is the maximum cable length recommended for the data pin?
A: For reliable signal transmission, we recommend keeping the cable length under 20 meters. Using a shielded cable is advised for longer distances to reduce noise interference.
Q: Is this compatible with 5V logic systems like Arduino Uno?
A: Absolutely. The DHT22 operates between 3.3V and 6.0V, making it fully compatible with both 3.3V and 5V microcontrollers.
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