Using Bosch BSEC lib throws stack overflow on Asset Tracker

RE: Using Bosch BSEC lib throws stack overflow on Asset Tracker

Didrik Rokhaug — Wed, 09 Sep 2020 10:59:20 GMT

A PR to add support for BSEC v1.4.8.0 has been opened: https://github.com/nrfconnect/sdk-nrf/pull/2878

RE: Using Bosch BSEC lib throws stack overflow on Asset Tracker

Didrik Rokhaug — Wed, 09 Sep 2020 08:04:33 GMT

We have been able to identify the thread that overflows.

It is the cloud backend thread that overflows during sensor initialization. Increasing that thread size to 4096 (the only value tried so far) got the system running: https://github.com/nrfconnect/sdk-nrf/blob/c37956ae6b27b4486c315380f5d67e0a0443aa2c/subsys/net/lib/nrf_cloud/src/nrf_cloud.c#L605

RE: Using Bosch BSEC lib throws stack overflow on Asset Tracker

DurandA — Mon, 07 Sep 2020 18:29:06 GMT

Thanks for your help.

In the meantime for other people encountering the same issue, an older version of the lib (1.4.7.4) can still be downloaded by editing the download URL from the confirmation email.

RE: Using Bosch BSEC lib throws stack overflow on Asset Tracker

Didrik Rokhaug — Mon, 07 Sep 2020 15:01:00 GMT

Hi.

The stack size I thought it would be, especially after you ruled out the application workqueue and main thread, was for the bsec_thread, defined in asset_tracker/src/env_sensors/bsec.c:69.

However, that did not work either.

I tried to debug a bit further, but that did not lead any way.

I have informed our developers, so hopefully it will be fixed soon.

Best regards,

Didrik