Bosch Sensortec Environmental Cluster (BSEC) Software v1.4.8.0 released on July 8th, 2020

The BSEC fusion library has been conceptualized to provide a higher-level signal processing and fusion for the BME680. The library receives compensated sensor values from the sensor API. It processes the BME680 signals to provide the requested sensor outputs.

Key features

• Precise calculation of ambient air temperature outside the device
• Precise calculation of ambient relative humidity outside the device
• Precise calculation of pressure outside the device
• Precise calculation of air quality (IAQ) level outside the device

Typical applications

• Health monitoring/ well-being (warning regarding dehydration / heat stroke)
• Home automation control
• Control heating, venting, air conditioning (HVAC) applications
• Gaming applications like flying toys
• Internet of things applications
• Context awareness
• 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
• Health care applications (e.g. Spirometry)
• Vertical velocity indication (e.g. rise/sink speed)

Supported platforms

• BSEC library is supported on 32, 16 and 8 bit MCU platforms

Available binaries for download:

The library size information above doesn't include additional dependencies based on the embedded system project & platform.

*The BSEC lite version is an abbreviated version of BSEC with reduced code size & memory requirements. It does not include functions to save the state of BSEC, if the device powers down.

For other platforms, please contact your local Bosch Sensortec representative

Advantages

• Easy to integrate
• Hardware and software co-design for optimal performance
• Complete software fusion solution out of one hand
• Eliminates need for own fusion software development
• Robust virtual sensor outputs optimized for the application

The BSEC software is only available for download or use after accepting the software license agreement. By using this library, you have agreed to the terms of the license agreement.

BSEC license agreement

As of this publication, the latest Arduino IDE 1.8.13 can be downloaded from this link

Either download this library as a zip and import it into the Arduino IDE. Refer to this guide on how to import libraries.

If you have already used the previous example code and hack guide, remove the linker flag -libalgobsec in the platform.txt file and reference to the compiler.c.elf.extra_flags.

The standard arduino-builder now passes the linker flags under compiler.libraries.ldflags. Most platform.txt files do not already include this new optional variable. You will hence need to declare this variable's default and add it to the end of the combine recipe. It is recommended to declare it in the following section like below,

# These can be overridden in platform.local.txt
compiler.c.extra_flags=
compiler.c.elf.extra_flags=
#compiler.c.elf.extra_flags=-v
compiler.cpp.extra_flags=
compiler.S.extra_flags=
compiler.ar.extra_flags=
compiler.elf2hex.extra_flags=
compiler.libraries.ldflags=

and add it in the combine recipe like the below examples

Original line 105,

## Combine gc-sections, archives, and objects
recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {build.exception_flags} -Wl,-Map "-Wl,{build.path}/{build.project_name}.map" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" -Wl,--start-group {object_files} "{archive_file_path}" {compiler.c.elf.libs} -Wl,--end-group  "-L{build.path}"

should become

## Combine gc-sections, archives, and objects
recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {build.exception_flags} -Wl,-Map "-Wl,{build.path}/{build.project_name}.map" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" -Wl,--start-group {object_files} "{archive_file_path}" {compiler.c.elf.libs} {compiler.libraries.ldflags} -Wl,--end-group  "-L{build.path}"

Original line 96,

## Combine gc-sections, archives, and objects
recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}"  "-L{build.path}" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" --specs=nano.specs --specs=nosys.specs {compiler.ldflags} -o "{build.path}/{build.project_name}.elf" {object_files} -Wl,--start-group {compiler.arm.cmsis.ldflags} -lm "{build.path}/{archive_file}" -Wl,--end-group

Should be,

recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}"  "-L{build.path}" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" --specs=nano.specs --specs=nosys.specs {compiler.ldflags} -o "{build.path}/{build.project_name}.elf" {object_files} -Wl,--start-group {compiler.arm.cmsis.ldflags} -lm "{build.path}/{archive_file}" {compiler.libraries.ldflags} -Wl,--end-group

Start or restart the Arduino IDE. Open the example code found under File>Examples>Bsec software library>Basic.

Select your board and COM port. Upload the example. Open the Serial monitor. You should see an output on the terminal.

Note that not all supported cores have been tested. In such cases, the examples can be found under File>Examples>INCOMPATIBLE>Bsec software library>Basic

The current list of tested boards include,