Pressure & Humidity Sensor Module 3.3V, I2C & SPI - GY-BME280

The BME280 is an integrated environmental sensor developed specifically for mobile applications where size and low power consumption are key design constraints. The unit combines individual high linearity, high accuracy sensors for pressure, humidity and temperature in an 8-pin metal-lid 2.5 x 2.5 x 0.93 mm³ LGA package, designed for low current consumption (3.6 μA @1Hz), long term stability and high EMC robustness.

The humidity sensor features an extremely fast response time which supports performance requirements for emerging applications such as context awareness, and high accuracy over a wide temperature range. The pressure sensor is an absolute barometric pressure sensor with features exceptionally high accuracy and resolution at very low noise. The integrated temperature sensor has been optimized for very low noise and high resolution. It is primarily used for temperature compensation of the pressure and humidity sensors, and can also be used for estimating ambient temperature.

The BME280 supports a full suite of operating modes which provides the flexibility to optimize the device for power consumption, resolution and filter performance."

Applications

• Context awareness, e.g. skin detection, room change detection
• Fitness monitoring / well-being
• Warning regarding dryness or high temperatures
• Measurement of volume and air flow
• Home automation control
• Control heating, ventilation, air conditioning (HVAC)
• Internet of things
• GPS enhancement (e.g. time-to-first-fix improvement, dead reckoning, slope detection)
• Indoor navigation (change of floor detection, elevator detection)
• Outdoor navigation, leisure and sports applications
• Weather forecast
• Vertical velocity indication (rise/sink speed)

Specifications

• Supply Voltage: 3.3V DC 
• Interface: I²C & SPI
• Operational Range: 
  • Temperature: -40 to +85°C 
  • Humidity: 0 – 100% 
• Pressure: 300 – 1100 hPa 
• Humidity sensor
  • Response time (τ63%): 1 s
  • Accuracy tolerance: ± 3 % relative humidity
  • Hysteresis: ≤ 2 % relative humidity
• Pressure sensor
  • RMS Noise: 0.2 Pa (equiv. to 1.7 cm)
  • Sensitivity Error: ± 0.25 % (equiv. to 1 m at 400 m height change)
  • Temperature coefficient offset: ±1.5 Pa/K (equiv. to ±12.6 cm at 1°C temperature change)
• I2C address
  • SDO LOW: 0x76
  • SDO HIGH: 0x77

Package Included

• 1 x GY-BME280
• 1 x 4P Pin Header

Documents

• bme280