thingy91 source code that includes AIR Quality measurements from BME680

[Luis Alberto]

I have been working with the thingy91 source code from ncs, I can compile and load the sample app successfully. However I did notice that when I compile the code it does not report the Air Quality from the BME680 sensor, while the out-of-the-box binary does.

After looking into the sample app, I notice that there is a function in env_sensors.c that is supposed to get the air quality measurement but it just return -1.

How am I supposed to configure the sample app in order to make it behave as the out of the box sample app?

Is the following configuration related to this?

project->configure nrf connect sdk project ->menu config-> asset tracker-> environment sensors->use bosh BME680 BSEC lib

I have enabled it... but it makes the project invalid...

I also have seen several posts that says that the driver library is: ncs\zephyr\drivers\sensor\bme680

however, adding those files to the asset tracker project cause an error of multiple definitions being found as it seems like the project already have a library added

Any help on how this sample apps are meant to be used as starting point to development is appreciated.

[Øyvind]

Hello, 

I have been working with the thingy91 source code from ncs, I can compile and load the sample app successfully.

What version of NCS are you working on? 

However I did notice that when I compile the code it does not report the Air Quality from the BME680 sensor, while the out-of-the-box binary does.

Have you done any configuration to the sample, or have you compiled it as is?

After looking into the sample app, I notice that there is a function in env_sensors.c that is supposed to get the air quality measurement but it just return -1.

 Are you getting any other error codes? I assume that you are receiving -1 from env_sensors_get_air_quality()? 

project->configure nrf connect sdk project ->menu config-> asset tracker-> environment sensors->use bosh BME680 BSEC lib

I have enabled it... but it makes the project invalid...

I see the documentation is missing regarding this, but it is mentioned in the KConfig file that you have to download the BSEC library from Bosch to be able to read BME680 data. This needs to be extracted to ncs/nrf/ext

config BOSCH_BSEC_LIBRARY_PATH
    string "Path to Bosch BSEC library folder"
    default "$(ZEPHYR_BASE)/../nrf/ext/BSEC_1.4.7.4_Generic_Release"
    help
      Path to the folder where the Bosch BSEC library is placed.

    
config USE_BME680_BSEC
    bool "Use Bosch BME680 BSEC lib"
    default n
    help
      Enable use of Bosch BSEC library. The library itself is not a part of
      NCS and must be downloaded from Bosch Sensortec.


config BOSCH_BSEC_LIBRARY_PATH
    string "Path to Bosch BSEC library folder"
    default "$(ZEPHYR_BASE)/../nrf/ext/BSEC_1.4.7.4_Generic_Release"
    help
      Path to the folder where the Bosch BSEC library is placed.

Now, back to project->configure nrf connect sdk project ->menu config-> asset tracker-> environment sensors

Enable use bosh BME680 BSEC lib under Asset Tracker and disable BME680 sensor under Zephyr

 

I have enabled it... but it makes the project invalid...

If the issue still persists after downloading the BSEC lib, please try to clean your build folder

Let me know how it works out for you!

Kind regards,
Øyvind

[Luis Alberto]

I didn't mean to make the ticket private... so I made it public for other people to look at it if they had the same issue... hope you don't mind... : )