The GY-BMP280 Barometer Sensor is a breakout board for Bosch BMP280 high-precision and low-power digital barometer. It can be used to measure temperature and atmospheric pressure accurately. It can be connected to a microcontroller with I2C.

Technical Specification:

• Model: GY-BMP280-3.3
• Chip: BMP280
• Power supply:  3V/3.3V DC
• Peak current: 1.12mA
• Air pressure range : 300-1100hPa (equi. to +9000…-500m above sea level)
• Temperature range:-40 … +85 °C
• Digital interfaces: I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
• Current consumption of sensor BMP280: 2.7µA @ 1 Hz sampling rate

 Features:

• The GY-BMP280 module comes with BMP280 sensor, which is an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183.
• 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 accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Applications:

• 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, Home weather stations
• Health care application (e.g. sirometry)
• Vertical velocity indication (e.g. risk/sink speed)
• Handsets such as mobile phones, tablet PCs, GPS devices
• Flying toys
• Watches