✍ 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."

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▼ 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)

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▼ Specifications
Supply Voltage:
[Optional] 5.0V DC
[Optional] 3.3V DC
Interface: I²C
Detect 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

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