BME680 with BSEC produces on 0.0s, even after 20 min

[mhammer3]

Thanks for your reply.

Yes, the returned value of "bsec_iot_init" is 0.

int bsecBm680Main()
{
return_values_init ret;

/* Call to the function which initializes the BSEC library
* Switch on low-power mode and provide no temperature offset */
ret = bsec_iot_init(BSEC_SAMPLE_RATE_LP, 0.0f, bus_write, bus_read, sleep, state_load, config_load);
if (ret.bme680_status)
{
/* Could not intialize BME680 */
return (int)ret.bme680_status;
}
else if (ret.bsec_status)
{
/* Could not intialize BSEC library */
return (int)ret.bsec_status;
}

/* Call to endless loop function which reads and processes data based on sensor settings */
/* State is saved every 10.000 samples, which means every 10.000 * 3 secs = 500 minutes */
bsec_iot_loop(sleep, get_timestamp_us, output_ready, state_save, 10000);

return 0;
}

[BSTRobin · Accepted solution]

Hello mhammer3,

I setup SW environment on STM32 and run bsec_iot_example.c. I found that the my code couldn't output the correct BSEC result at first. After I check code in example, the stack size of the system should be increased, otherwise the example code will not work properly.

Attachment is my code, you could  refer them.

[mhammer3]

Thanks BSTRobin, will try and let you know.