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Document number: BST-BME680-DS001-09 Revision_1.9_022024

4. Software and use cases

4.1 BSEC software

BME680 sensor is intended to be used together with Bosch Software Environmental Cluster (BSEC) solution and BME6xy

sensor API to unlock its full potential. The BSEC software features intelligent algorithms which enable use cases such as

indoor-air-quality monitoring using the BME680.

Bosch Sensortec BSEC software is available as a closed source binary which will be made available via a Software License

Agreement (SLA) on the Bosch Sensortec website (https://www.bosch-sensortec.com/bst/products/all_products/BSEC).

Sensor API covers basic sensor communication and data compensation functions and is available as open-source code from

Github (https://github.com/BoschSensortec/BME68x-Sensor-API).

The key features of the hardware-software system are:

•

Calculation of ambient air temperature outside of the device (e.g. phone)

•

Calculation of ambient relative humidity outside of the device

•

Calculation of index for air quality (IAQ) level outside of the device

Moreover, the software algorithms handle humidity compensation, baseline as well as long-term drift correction of the gas

sensor signal.

Different power modes for the gas sensor and corresponding data rates are supported by the software solution:

•

Ultra low power (ULP) mode is designed for battery-powered and/or frequency-coupled devices over extended

periods of time. This mode features an update rate of 300 seconds and an average current consumption of <0.1 mA

•

Quick Ultra-low power (q-ULP) has a 3 s data rate for Temperature, pressure and humidity w/o significantly

increasing the power consumption compared to ULP.

•

Low power (LP) mode that is designed for interactive applications where the air quality is tracked and observed at

a higher update rate of 3 seconds with a current consumption of <1 mA

•

Continuous (CONT) mode provides an update rate of 1 Hz and shall only be used short-term for use cases that

incorporate very fast events or stimulus.

Table 17: BSEC gas sensor power-modes

BSEC power mode

Update rate

Average current consumption

Ultra-low power mode (ULP)

3.3 mHz

0.09 mA

quick Ultra-low power mode (q-ULP)

0.33 Hz (T, p, h) / 3.3 mHz (IAQ)

0.1 mA

Low power mode (LP)

0.33 Hz

0.9 mA

Continuous mode (for testing purposes

only)

1 Hz

12 mA

The BSEC software suite can be downloaded from the Bosch Sensortec website:

https://www.bosch-sensortec.com/bst/products/all_products/BSEC

The following table describes the available outputs of BSEC. Full descriptions of the outputs and the available interfaces are

available in the integration guide shipped together with the BSEC software.

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