BMP280 3.3V Atmospheric Pressure Sensor Module is an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. The BMP280 is an absolute barometric pressure sensor especially designed for mobile.This sensor is great for 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 pressure with ±1 hPa absolute accuraccy, and temperature with ±1.0°C accuracy. Pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1. 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 applications; Weather forecast; Health care application(e.g. sirometry); Vertical velocity indication(e.g. risk/sink speed) BMP280 3.3V Atmospheric Pressure Sensor Module is an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. The BMP280 is an absolute barometric pressure sensor especially designed for mobile.This sensor is great for 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 pressure with ±1 hPa absolute accuraccy, and temperature with ±1.0°C accuracy. Pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1. 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 applications; Weather forecast; Health care application(e.g. sirometry); Vertical velocity indication(e.g. risk/sink speed)