Adafruit bme280 i2c or spi temperature humidity pressure sensor adafruit 2652 p the adafruit bme280 temperature humidity pressure sensor is an excellent choice for your next environmental weather project with the advantage of i2c and spi connectivity see below for details about its measurement accuracy in particular the pressure sensor is accurate enough to reliably measure altitude to within 1m the board has an onboard regulator and level shifting to make it 3 3 and 5v compatible for l