IAQ from BME688 on NRF9160 ZephyrRTOS

[DDVi]

Hi, Zephyr already has support for BME680. We are interested in IAQ from BME688 on NRF9160 ZephyrRTOS, and have been using this:

https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/sensor/bme680/bme680.c#L383

But the values saturate at 250. Shouldn't it go up to 500? It would go up to 250 in rather benign situations and flatten there. I have tried putting it close to Alcohol, surrounding it with ethanol but can only get a flat line at 250. 

Many thanks for any hints?

[BSTRobin]

Hello DDVi,

What is the current accuracy value? And how long did you test it?

[DDVi]

The accuracy says 0. They have been running for over a month, both indoors and outdoors. 

[BSTRobin]

Hello DDVi,

There was BSEC example code in another topic, you could refer here: https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/NRF52840-with-BME680/m-p/49693/highlight...

[wassfila]

Hi,

in this project, I ported the BME68x-Sensor-API driver and Bosch-BSEC2-Library into Zephyr
https://github.com/HomeSmartMesh/sdk-hsm-thingy53

In the samples of project I shared, is target is not the NRF9160 but the Thingy53, but as it is a BME688 integration into Zephyr, porting it to your target should be quite easy as the provided driver and library are outside the samples and can be added with config flags.