Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Interface Protocol | I2C |
| Operating Voltage | 3.3V to 5V DC |
| Temperature Range | -40°C to 85°C |
| Humidity Range | 0% to 100% RH |
| Pressure Range | 300 to 1100 hPa |
| Humidity Accuracy | ±2% RH |
| Temperature Accuracy | ±0.5°C |
| PCB Dimensions | 22mm x 17mm x 3mm |
| Weight | 4.5 grams |
| Compatibility | Arduino, ESP32, Raspberry Pi |
Anonymous
Apr 11, 2026
Rating: 4/5
Good sensor, tricky wiring
The sensor itself is accurate, but I had to add external pull-up resistors to get stable I2C communication. Once wired correctly, it performs well.
Anonymous
Feb 24, 2026
Rating: 5/5
Great value combo
Getting both humidity and pressure on one module saves so much space on my PCB. Library support is plentiful online which made integration easy.
Anonymous
Feb 14, 2026
Rating: 5/5
High precision as advertised
I compared this against a calibrated industrial sensor and the variance was minimal. Excellent for DIY IoT applications requiring environmental data.
Anonymous
Feb 11, 2026
Rating: 3/5
Documentation could be better
The module works, but the included manual was very sparse. I had to search online for library examples and pinout diagrams to get it running.
Anonymous
Jan 23, 2026
Rating: 5/5
Perfect for my weather station
Works flawlessly with my ESP32 project. The readings are consistent and match my professional thermometer closely. Great value for getting both pressure and humidity on one I2C bus.
Q: Is this sensor module waterproof?
A: No, this is an electronic component and is not waterproof. It should be housed in a protective enclosure if used outdoors.
Q: Does it consume much power for battery projects?
A: It is a low-power sensor suitable for battery-operated devices, especially if you utilize sleep modes between readings.
Q: What are the default I2C addresses?
A: The AHT20 typically uses 0x38 and the BMP280 uses 0x76 or 0x77 depending on the SDO pin configuration.
Q: What libraries do you recommend for Arduino?
A: We recommend using the Adafruit BMP280 library and a compatible AHT20 library available in the Arduino Library Manager.
Q: Can I use this with 5V logic boards?
A: Yes, the module supports 3.3V to 5V input, but ensure your microcontroller supports the I2C voltage levels or use a logic level shifter.
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