The Bosch BME280 is a 3 in 1 ambient sensor that combines humidity, air pressure and temperature measurements. It has a digital I2C and SPI interface. Technical data - Operating voltage: 1.71 ... 3,6 V - Dimensions (LxWxHx): 15.3 x 11.5 x 2.5 mm Properties BME280 - air humidity - Reaction time (t63%) 1s - Accuracy tolerance ±3 % relative humidity - Hysteresis = 2% relative humidity - air pressure - pressure range 300 .... 1100 hPa (equivalent to +9000 .... -500 m above/below sea level) - relative accuracy ±0.12 hPa, corresponds to ±1 m (950 .... 1050 hPa @25°C) - absolute accuracy typ. ±1 hPa (950 ...1050 hPa, 0 ... 40 °C) - temperature - Operating range Operating: -40 ... +85 °C - full accuracy 0 ... 65 °C Delivery incl. pin header