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 to 5.5V DC |
| Sampling Period | 2 Seconds |
| Pin Count | 4 Pins |
| Application | Arduino, Raspberry Pi, IoT Projects |
Anonymous
Mar 16, 2026
Rating: 5/5
Easy to use for beginners
As someone new to electronics, I found this very forgiving. Plenty of tutorials online. The data output is straightforward to parse.
Anonymous
Mar 13, 2026
Rating: 5/5
Reliable and robust
I have bought five of these modules. All of them worked out of the box. The PCB mount makes wiring much cleaner than the bare sensor version.
Anonymous
Mar 13, 2026
Rating: 4/5
Works well in high humidity
Using this in my small greenhouse. It handles the high humidity environment well without drifting too much. Would recommend adding a pull-up resistor if your board doesn't have one.
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for my weather station project
This sensor works flawlessly with my Arduino Uno. The readings are consistent and match my professional hygrometer closely. Setup was easy using the standard library.
Anonymous
Mar 09, 2026
Rating: 5/5
Superior to DHT11
If you need better precision than the DHT11, this is the upgrade you need. The temperature range is also much wider, suitable for outdoor enclosures.
Anonymous
Mar 04, 2026
Rating: 4/5
Good value, slow sampling rate
Great accuracy for the price point. Just remember it only updates every 2 seconds, so don't expect real-time rapid changes. Perfect for indoor monitoring though.
Q: Does this module come with a pull-up resistor installed?
A: Yes, most breakout boards for the DHT22 include a 10k ohm pull-up resistor between the data and VCC pins, making it ready to use immediately.
Q: Which Arduino library is best suited for this module?
A: The 'DHT sensor library' by Adafruit is the most popular and well-maintained library for interfacing with the DHT22 on Arduino platforms.
Q: What is the maximum cable length recommended for accurate readings?
A: For reliable data transmission, we recommend keeping the cable length under 20 meters. Longer distances may require signal buffering or shielding.
Q: Is this sensor waterproof?
A: No, the DHT22 sensor itself is not waterproof. If you plan to use it outdoors or in wet environments, you must house it in a breathable waterproof enclosure.
Q: Can I connect this directly to a 3.3V microcontroller like ESP8266?
A: Absolutely. The DHT22 operates within a voltage range of 3.3V to 5.5V, so it is fully compatible with 3.3V logic systems without needing a level shifter.
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