BME280 Temp / Humidity / Pressure
I²C / SPI sensor with ±0.5 °C, ±3 %RH and ±1 hPa accuracy — plugs straight int
Two chips on one board: AHT20 (temp/humidity, I²C 0x38) and BMP280 (pressure, 0x76). Cheap and well documented, but the AHT20 address collides with this device’s touch controller.
★ The AHT20 sits at 0x38, the same address as the on-board FT6336 touch controller — the touchscreen misbehaves. Only its BMP280 half is usable (page 38 barometer); for humidity buy the SHT30 at 0x44.
| AHT20 | I²C 0x38, ±0.3 °C / ±2 %RH |
|---|---|
| BMP280 | I²C 0x76, 300–1100 hPa |
| Supply | 3.3 V |
| Bus | I²C (both chips share it) |
Owners talk about wiring, quirks and fixes here — ask anything.
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