Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Chips	AHT20 and BMP280
Communication Interface	I2C
Operating Voltage	3.3V - 5V DC
Temperature Range	-40°C to +85°C
Humidity Range	0% to 100% RH
Pressure Range	300 hPa to 1100 hPa
Temperature Accuracy	±0.5°C
Humidity Accuracy	±2% RH
PCB Dimensions	24mm x 16mm
Mounting Holes	3mm diameter

6 reviews

Anonymous

Mar 29, 2026

Rating: 4/5

Good value, clear documentation

The sensor readings seem accurate when compared to my professional hygrometer. The only minor issue was that the pin headers were not included, so I had to solder them myself. Otherwise, great product.

Anonymous

Mar 25, 2026

Rating: 4/5

Works well after initial confusion

I initially struggled with the wiring, but once I checked the schematic provided by the seller, it worked immediately. The data output is consistent. Just make sure you have a logic level converter if using 5V boards.

Anonymous

Mar 24, 2026

Rating: 5/5

Compact and precise

Small footprint makes it easy to fit into tight enclosures. The calibration data seems pre-loaded correctly as the values matched my reference instruments right out of the box.

Anonymous

Mar 23, 2026

Rating: 5/5

Easy to integrate

Plug and play with standard libraries. The BMP280 pressure readings are stable, and the AHT20 responds quickly to changes in humidity. Very satisfied with the build quality.

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for Weather Stations

This module works flawlessly with my ESP32 project. The I2C addresses are distinct, so there were no conflicts reading data from both sensors simultaneously. Highly recommended for DIY weather stations.

Anonymous

Mar 07, 2026

Rating: 5/5

Reliable for plant monitoring

I bought five of these for my automated greenhouse system. They have been running 24/7 for a month without any drift or failures. The precision is more than enough for agricultural monitoring.

5 FAQ

Q: What library do you recommend for Arduino?

A: For the AHT20, the 'AHT20' library by Rob Tillaart works well. For the BMP280, the Adafruit BMP280 library is the industry standard. Both are available in the Arduino Library Manager.

Q: Does this module come with pin headers soldered?

A: No, the module is shipped without pin headers to allow for flexible mounting options. You will need to solder your own headers or wires.

Q: What are the default I2C addresses for these sensors?

A: The AHT20 typically uses address 0x38, and the BMP280 usually uses 0x76 or 0x77 depending on the specific batch. Both can be detected using an I2C scanner sketch.

Q: Is this compatible with Raspberry Pi GPIO?

A: Yes, it is fully compatible with Raspberry Pi models via the I2C interface. Ensure you enable I2C in the raspi-config settings and connect the VCC to 3.3V.

Q: Can this sensor be used outdoors directly?

A: The PCB itself is not waterproof. For outdoor use, you must place the module inside a ventilated, weatherproof enclosure to protect it from rain and direct sunlight while allowing air flow.

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