Description
Reviews
| 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 |
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.
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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