Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Communication Interface	I2C
Operating Voltage	1.8V - 3.6V DC
Temperature Range	-40°C to +85°C
Humidity Range	0% to 100% RH
Temperature Accuracy	±0.5°C
Humidity Accuracy	±2% RH
Response Time	< 5 seconds
Package Type	SMD Module with Header Pins
Compatibility	Arduino, ESP32, Raspberry Pi, STM32
Upgrade Status	Enhanced version of DHT11/DHT22

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Perfect for my plant monitor

I needed something more accurate than my old sensors for my indoor greenhouse. The AHT20 provides consistent data that helps me automate my misting system effectively. Very happy with the precision.

Anonymous

Mar 20, 2026

Rating: 4/5

Solid performance

Integration with Home Assistant was straightforward. The humidity readings seem a bit more responsive than my older DHT22 units. Good product overall.

Anonymous

Mar 20, 2026

Rating: 5/5

Bought ten for our workshop

We equipped all our student workstations with these. They are robust enough to handle beginner wiring mistakes and provide accurate enough data for educational purposes. Excellent value.

Anonymous

Mar 18, 2026

Rating: 4/5

Great sensor, easy library support

Works flawlessly with the standard Adafruit library on my ESP32. The only reason for 4 stars instead of 5 is that the pinout diagram on the back was slightly faint, but a quick Google search solved that.

Anonymous

Mar 12, 2026

Rating: 5/5

Reliable for long-term logging

Been running this module for three weeks straight logging data every minute. No drift detected and it hasn't missed a beat. The low power consumption is also a nice bonus for battery projects.

Anonymous

Mar 09, 2026

Rating: 5/5

Significant upgrade from DHT11

The I2C interface makes wiring much cleaner compared to the old single-wire DHT11. Readings are stable and respond quickly to changes in room humidity. Highly recommended for any home automation project.

5 FAQ

Q: Does it come with pre-soldered header pins?

A: Yes, this module ships with pre-soldered 4-pin header strips so you can plug it directly into a breadboard without needing to solder immediately.

Q: What is the default I2C address?

A: The default I2C address for the AHT20 is typically 0x38. If you have multiple sensors, please note that this specific module usually does not allow address changing via jumpers.

Q: Can I use this outdoors in the rain?

A: No, this is a bare PCB module and is not waterproof. If you plan to use it outdoors, you must house it in a weatherproof enclosure with a breathable membrane to protect it from direct moisture.

Q: How often should I calibrate this sensor?

A: The AHT20 is factory calibrated and generally does not require user calibration for standard hobbyist or commercial applications. It maintains accuracy well over time under normal conditions.

Q: Is this module compatible with 5V Arduino boards?

A: Yes, the module includes a voltage regulator and level shifting, making it safe to use with both 3.3V and 5V microcontrollers like the Arduino Uno.

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