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Home / Computer Hardware, Monitors & Peripherals / AHT21/GXHT30 Digital Temperature and Humidity Sensor Module with Digital Output

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Interface Protocol I²C / I2C
Operating Voltage 2.2V to 5.5V DC
Temperature Range -40°C to 85°C
Humidity Range 0% to 100% RH
Temperature Accuracy ±0.3°C
Humidity Accuracy ±2% RH
Response Time 5 Seconds
Package Type Breakout Module with Header Pins
Power Consumption 2.5µA (Sleep Mode)
Compatible Platforms Arduino, ESP32, Raspberry Pi, STM32

5 reviews

A

Anonymous

Apr 08, 2026

Rating: 5/5

Perfect for IoT Projects

Integrated smoothly with my ESP32 home automation setup. The readings are stable and the library support is excellent.

A

Anonymous

Apr 05, 2026

Rating: 5/5

Accurate Readings

Compared this with a calibrated hygrometer and the values were very close. Great value for the price point.

A

Anonymous

Feb 12, 2026

Rating: 5/5

Great Support

Had questions about wiring and the support team responded quickly. The sensor itself works flawlessly.

A

Anonymous

Feb 11, 2026

Rating: 4/5

Good Module

Works as expected. Only giving 4 stars because the header pins were slightly bent upon arrival, but easy to fix.

A

Anonymous

Feb 02, 2026

Rating: 5/5

Fast Shipping

Arrived earlier than expected. Well packaged in anti-static bag. Ready to use out of the box.

5 FAQ

Q: What is the default I2C address?

A: The default I2C address is typically 0x38, but please verify with your specific library documentation.

Q: Is this sensor waterproof for outdoor use?

A: No, this module is not waterproof. It should be housed in a protective enclosure if used outdoors.

Q: Is 5V logic level safe for the I2C pins?

A: We recommend using 3.3V logic levels for optimal performance and longevity, though the chip supports up to 5.5V supply.

Q: Does this come factory calibrated?

A: Yes, each sensor is individually calibrated at the factory for accuracy.

Q: Are there specific libraries required for Arduino?

A: Yes, the Adafruit AHTX0 library is widely used and compatible with this sensor module.

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