Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	AHT20
Interface Type	I2C Digital Signal
Temperature Range	-40°C to +85°C
Humidity Range	0% to 100% RH
Accuracy (Humidity)	±2% RH
Accuracy (Temperature)	±0.3°C
Supply Voltage	2.4V to 5.5V DC
Response Time	< 5 Seconds
Package Type	SMD Module with Pins
Application	IoT, HVAC, Smart Home

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Good sensor, careful with wiring

Works well once connected properly. Make sure you have pull-up resistors on the SDA and SCL lines. The humidity data updates quickly.

Anonymous

Mar 21, 2026

Rating: 4/5

Great module for beginners

Easy to interface with Arduino. Libraries are readily available. Only wish the pins were pre-soldered, but that's a minor inconvenience.

Anonymous

Mar 13, 2026

Rating: 5/5

Consistent performance

Bought five units for a multi-point monitoring system. All five performed identically right out of the box. Excellent consistency.

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for my weather station project

The I2C communication was seamless with my ESP32. Readings are stable and match my reference meter closely. Great value for the precision offered.

Anonymous

Mar 09, 2026

Rating: 5/5

Highly accurate and reliable

I tested this against a professional grade sensor and the deviation was negligible. The anti-interference feature seems to work well in noisy environments.

Anonymous

Mar 08, 2026

Rating: 5/5

Essential for automation

Using these in my automated greenhouse setup. They have been running 24/7 for two months without drifting. Very satisfied with the build quality.

5 FAQ

Q: What is the default I2C address for this sensor?

A: The default I2C address for the AHT20 is usually 0x38. Please refer to the datasheet for confirmation if you are using a specific batch.

Q: Can this operate at 3.3V logic levels?

A: Absolutely. The AHT20 supports a voltage range of 2.4V to 5.5V, so it is fully compatible with both 3.3V and 5V microcontrollers.

Q: Does this module come with pull-up resistors built-in?

A: Yes, the AHT20 module typically includes onboard pull-up resistors for the I2C lines, making it ready to use without extra components.

Q: Is there a library available for Python?

A: Yes, there are several open-source Python libraries available for Raspberry Pi and other platforms that support the AHT20 via the I2C bus.

Q: How often should I calibrate this sensor?

A: The AHT20 is factory calibrated and generally does not require user calibration under normal operating conditions. It maintains stability over time.

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