Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Type	AHT20 (Temp/Humidity) + BMP280 (Pressure)
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
Accuracy (Temperature)	±0.3°C
Accuracy (Humidity)	±2% RH
PCB Dimensions	22mm x 16mm x 3mm
Compatibility	Arduino, ESP32, ESP8266, Raspberry Pi

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

High precision as advertised

I tested this against a calibrated lab sensor and the deviation was minimal. The BMP280 pressure reading is particularly impressive for altitude estimation projects.

Anonymous

Mar 20, 2026

Rating: 4/5

Great value, easy to use

Works flawlessly with my ESP32 project. Libraries for both sensors are widely available. Only giving 4 stars because the pin headers were not included, but soldering them was trivial.

Anonymous

Mar 18, 2026

Rating: 5/5

No issues with integration

Plug and play with Home Assistant using an ESP home node. The data update rate is fast enough for real-time logging. Highly recommended for home automation enthusiasts.

Anonymous

Mar 16, 2026

Rating: 5/5

Good for learning IoT

Bought this for a university project. Documentation online is plentiful, making it easy to get started. The combination of two sensors on one board saves a lot of space.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect for Weather Stations

This module is exactly what I needed for my DIY weather station. The I2C addresses are distinct, so there were no conflicts on the bus. Data readings are stable and match my reference instruments closely.

Anonymous

Mar 03, 2026

Rating: 4/5

Reliable for greenhouse monitoring

Been running this in my smart greenhouse for a month. Humidity readings respond quickly to changes. Would prefer a waterproof casing option, but the board itself is solid.

5 FAQ

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

A: The AHT20 typically uses address 0x38, and the BMP280 usually defaults to 0x76. Please verify with an I2C scanner sketch as batch variations can occur.

Q: Do you provide sample code for Raspberry Pi?

A: Yes, we have Python libraries and example scripts available in the 'Documentation' section of our website that cover both I2C setup and data retrieval for Raspberry Pi.

Q: Can I read both sensors simultaneously without delays?

A: Yes, since they operate on the same I2C bus with different addresses, you can poll them in the same loop. However, respect the specific conversion time requirements for each sensor in your code.

Q: Does this module work with 5V Arduino Uno 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: Is the PCB coated for moisture resistance?

A: The board has a basic conformal coating on the solder side, but for high-humidity environments, we recommend adding an external protective enclosure.

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