Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	SEN0137
Operating Voltage	3.3V - 5.5V 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
Dimensions	15mm x 25mm x 8mm
Compatibility	Arduino, Raspberry Pi, ESP32

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Essential for plant care

Helps me keep track of humidity levels for my tropical plants. The form factor is small enough to fit inside my custom 3D printed enclosure.

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect for my weather station project

This DHT22 module is exactly what I needed. The readings are consistent and match my calibrated hygrometer closely. Setup with Arduino was straightforward using the standard library.

Anonymous

Mar 18, 2026

Rating: 4/5

Works well with ESP32

Integrated easily into my Home Assistant dashboard. Had to enable the internal pull-up resistor in code, but once configured, the data stream is stable.

Anonymous

Mar 09, 2026

Rating: 5/5

Great value for students

Cheap enough to buy a few for practice but accurate enough for final projects. The pinout is clearly labeled on the PCB which saved me from wiring errors.

Anonymous

Mar 08, 2026

Rating: 4/5

Good precision, slow sampling

The accuracy is great for monitoring my greenhouse. Just remember it only updates every 2 seconds, so don't expect real-time rapid changes. Otherwise, a solid sensor.

Anonymous

Mar 02, 2026

Rating: 5/5

Reliable industrial grade performance

I've deployed ten of these in a server room monitoring setup. They have been running for three months without drift or failure. Highly recommended for stable environments.

5 FAQ

Q: Is this compatible with 3.3V logic boards like the Raspberry Pi?

A: Absolutely. The module operates within a 3.3V to 5.5V range, making it fully compatible with both 3.3V and 5V microcontrollers without needing a level shifter.

Q: How do I calibrate the sensor if the readings seem off?

A: The DHT22 is factory calibrated and does not support user calibration via software. If readings are significantly incorrect, please check your power supply stability and wiring connections first.

Q: Can this sensor be used outdoors in direct rain?

A: No, this module is not waterproof. While the sensor element has some protection, the PCB and electronics are not sealed. You must house it in a weatherproof enclosure if used outside.

Q: What is the maximum cable length recommended for reliable data transmission?

A: For best results, keep the cable length under 20 meters. If you need longer distances, consider using a shielded cable and ensuring a strong pull-up resistor.

Q: Does this module come with a pull-up resistor installed?

A: Yes, the DFRobot DHT22 module includes a built-in 10k pull-up resistor on the data line, so you can connect it directly to your microcontroller without external components.

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