Hardware
BME680
Temperature, humidity, pressure and gas/VOC (air quality)
Audio summary
BME680
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4-in-1 sensor (temp, humidity, pressure and gas/VOC) over I2C/SPI for air quality.
The BME680 adds a gas-sensitive element (volatile organic compounds) to the BME280BHardwareBME280Temperature, humidity and barometric pressure sensorView profile trio, which combined with Bosch's BSEC library yields an air-quality index (IAQ). It keeps the tiny footprint and low power.
Note: the gas sensor measures resistance, not absolute concentrations of a specific gas; it gives 'good/bad air' trends, not CO₂ ppm (for that, the SCD41SHardwareSCD41CO₂, temperature and humidity sensorView profile). It's the pick for all-in-one environmental stations.
Pros
- Four measurements in a tiny chip
- Air-quality index via BSEC
- I2C and SPI, low power
Cons
- Gas is a relative index, not CO₂ ppm
- BSEC adds integration complexity
