Tinker Tailor
AHT20 + BMP280 Temperature, Humidity & Pressure Sensor
AHT20 + BMP280 Temperature, Humidity & Pressure Sensor
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Three environmental readings on one tiny board. This module pairs an AHT20 (temperature and humidity) with a Bosch BMP280 (barometric pressure and temperature). Both share the same four I2C pins, so you wire it once and read everything.
Ships next business day from Nova Scotia · 30-day returns · Questions? cmoz@tinkertailor.ca
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Details
It's a popular, budget-friendly alternative to the BME280. Because pressure changes with height, the BMP280 can also estimate altitude — enough to tell which floor you're on or when you're climbing a hill.
Specifications
- Sensors: AHT20 + Bosch BMP280
- Temperature: −40 to +85 °C (AHT20 ±0.3 °C)
- Humidity: 0–100% RH (±2%)
- Pressure: 300–1100 hPa (±1 hPa)
- Interface: I2C — AHT20 at 0x38, BMP280 at 0x77 (some boards 0x76)
- Supply voltage: 3.3V recommended
- Headers: included, not soldered
Pin Definitions
- VDD — Power in (3.3V recommended)
- SDA — I2C data
- GND — Ground
- SCL — I2C clock
Project Ideas
A hiking jacket that logs altitude and weather, a hat that changes colour ahead of a storm, comfort sensing in performance wear, or a classroom weather station.
Good to know
If your code can't find the BMP280, run an I2C scanner. Depending on the board it will be at 0x76 or 0x77.
Pair It With
Great with the Adafruit ESP32-C3 QT Py, Adafruit ESP32-S2 QT Py or Beetle ESP32 [Sewable]. Show live readings on the 1.28" round TFT display. If you'd rather not solder, try the SHT40 Qwiic board or the Adafruit AHT20.
In the box
- AHT20 + BMP280 module × 1
- Header pins × 1 set
