{"product_id":"aht20-bmp280-temperature-humidity-pressure-sensor","title":"AHT20 + BMP280 Temperature, Humidity \u0026 Pressure Sensor","description":"\u003cp\u003eThree environmental readings on one tiny board. This module pairs an \u003cstrong\u003eAHT20\u003c\/strong\u003e (temperature and humidity) with a \u003cstrong\u003eBosch BMP280\u003c\/strong\u003e (barometric pressure and temperature). Both share the same four I2C pins, so you wire it once and read everything.\u003c\/p\u003e\u003cp\u003eIt's a popular, budget-friendly alternative to the BME280. Because pressure changes with height, the BMP280 can also estimate \u003cstrong\u003ealtitude\u003c\/strong\u003e — enough to tell which floor you're on or when you're climbing a hill.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensors:\u003c\/strong\u003e AHT20 + Bosch BMP280\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e −40 to +85 °C (AHT20 ±0.3 °C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 0–100% RH (±2%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure:\u003c\/strong\u003e 300–1100 hPa (±1 hPa)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e I2C — AHT20 at 0x38, BMP280 at 0x77 (some boards 0x76)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply voltage:\u003c\/strong\u003e 3.3V recommended\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeaders:\u003c\/strong\u003e included, not soldered\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePin Definitions\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVDD\u003c\/strong\u003e — Power in (3.3V recommended)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDA\u003c\/strong\u003e — I2C data\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e — Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCL\u003c\/strong\u003e — I2C clock\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProject Ideas\u003c\/h2\u003e\u003cp\u003eA 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.\u003c\/p\u003e\u003ch2\u003eGood to know\u003c\/h2\u003e\u003cp\u003eIf your code can't find the BMP280, run an I2C scanner. Depending on the board it will be at 0x76 or 0x77.\u003c\/p\u003e\u003ch2\u003ePair It With\u003c\/h2\u003e\u003cp\u003eGreat with the \u003ca href=\"\/products\/adafruit-esp32-c3-qt-py-wifi-dev-board-w-stemma-qt-1\"\u003eAdafruit ESP32-C3 QT Py\u003c\/a\u003e, \u003ca href=\"\/products\/adafruit-esp32-s2-qt-py-wifi-dev-board-w-stemma-qt\"\u003eAdafruit ESP32-S2 QT Py\u003c\/a\u003e or \u003ca href=\"\/products\/beetle-esp32-microcontroller-sewable-1\"\u003eBeetle ESP32 [Sewable]\u003c\/a\u003e. Show live readings on the \u003ca href=\"\/products\/1-28-inch-tft-lcd-display-module-round-240x240-1\"\u003e1.28\" round TFT display\u003c\/a\u003e. If you'd rather not solder, try the \u003ca href=\"\/products\/sht40-temperature-humidity-sensor-qwiic\"\u003eSHT40 Qwiic board\u003c\/a\u003e or the \u003ca href=\"\/products\/adafruit-aht20-temperature-humidity-sensor-breakout-board-stemma-qt-qwii-1\"\u003eAdafruit AHT20\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eIn the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAHT20 + BMP280 module × 1\u003c\/li\u003e\n\u003cli\u003eHeader pins × 1 set\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tinker Tailor","offers":[{"title":"Default Title","offer_id":51926737125609,"sku":"TT-AHT20-BMP280","price":7.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/8006\/3209\/files\/Sf1fc83c9fa854d38b390a2d571b78e27o.webp?v=1790179663","url":"https:\/\/www.tinkertailor.ca\/products\/aht20-bmp280-temperature-humidity-pressure-sensor","provider":"Tinker Tailor","version":"1.0","type":"link"}