Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Chips	AHT20 and BMP280
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
Humidity Accuracy	±2% RH
Temperature Accuracy	±0.3°C
Board Dimensions	22mm x 16mm
Compatibility	Arduino, ESP32, Raspberry Pi, STM32

6 reviews

Anonymous

Mar 26, 2026

Rating: 5/5

Libraries work out of the box

Used the standard Adafruit libraries for both chips. No conflicts detected. The barometric pressure readings helped me calculate altitude accurately for my drone project.

Anonymous

Mar 19, 2026

Rating: 4/5

Good for learning embedded systems

Bought this for a university project. Documentation online is plentiful which made integration smooth. One star off because the silk screen printing is slightly faint.

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for Weather Stations

This module works flawlessly with my ESP32 project. The I2C addresses are distinct, so reading both sensors on the same bus was easy. Data seems very stable compared to my old DHT11.

Anonymous

Mar 15, 2026

Rating: 4/5

Great value, minor soldering needed

The sensor accuracy is impressive for the price. Headers were not included, so I had to solder my own pins, but that is standard for these modules. Highly recommended for DIY enthusiasts.

Anonymous

Mar 15, 2026

Rating: 5/5

Monitoring my greenhouse

I bought three of these to monitor different zones in my greenhouse. The humidity response time is quick, and the build quality feels solid. Very happy with this purchase.

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable and precise

After running this for two weeks straight, the data logging has been consistent. The combination of temperature, humidity, and pressure in one small board saves a lot of space.

5 FAQ

Q: Is this sensor waterproof?

A: No, the sensor module itself is not waterproof. It should be housed in a breathable enclosure if used outdoors to protect against direct rain while allowing air flow.

Q: How do I calibrate the pressure sensor for sea level?

A: Calibration is done in your software code by inputting your local altitude. The library functions allow you to adjust the sea level pressure calculation based on your location.

Q: Can this module be used with 5V Arduino boards directly?

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.

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

A: The AHT20 typically uses address 0x38 and the BMP280 uses 0x76. These can usually be changed via hardware straps if conflicts arise.

Q: Does it come with header pins soldered?

A: No, the module is shipped without headers to keep shipping costs low and allow flexibility for breadboard or direct wire soldering. You will need to solder your own headers.

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