Description It has stepped up their game with their new BMP280 sensor an environmental sensor with temperature barometric pressure that is the next generation upgrade to the BMP085 BMP180 BMP183 This sensor is greatfor all sorts of weather sensing and can even be used in both I2C and SPI This precision sensor is the best low cost precision sensing solution for measuring barometric pressurewith 1 hPa absolute accuracy and temperature with 1 0C accuracy Because pressure changes with altitude and the pressure measurements are so good you can also use it as an altimeter with 1 meter accuracyFeature Model GY BMP280 3 3Chip BMP280Power supply 3VCommunication method Standard IIC SPI communication protocolAir pressure range 300 1100hPaPin pitch 2 54mmModule size 11 5mm 15mm Typical application Enhancement of GPS navigation e g time to first fix improvement dead reckoning slope detection Indoor navigation floor detection elevator detection Outdoor navigation leisure and sports applicationsWeather forecastHealth care application e g sirometry Vertical indication e g risk sink speed Package Included 3 x GY BMP280 3 3 High Precision Atmospheric Pressure Sensor Module