BSEC2.4.0.0 Heat Profile duration

[Julien1]

Hi,

I have collected data using the BME688 Development Kit with 8 BME688 sensors and then generated an algorithm for BSEC2.4.0.0 using IA Studio 2.0.0

I used the default heat profile HP-354

I can init BSEC Library and load algorithm file without problem but after calling bsec_sensor_control() to retrieve sensor settings, I can see that the duration of each step of heat profile are too short :

duration: 5ms, temp: 320 C
duration: 2ms, temp: 100 C
duration: 10ms, temp: 100 C
duration: 30ms, temp: 100 C
duration: 5ms, temp: 200 C
duration: 5ms, temp: 200 C
duration: 5ms, temp: 200 C
duration: 5ms, temp: 320 C
duration: 5ms, temp: 320 C
duration: 5ms, temp: 320 C
duration total: 77ms

For each Step the Temperature looks correct but the duration is too short, for a total duration of 77m instead of ~10,8s

What am I doing wrong ?

[BSTRobin]

Hi Julien1,

The heat profile duration value is a multiple of 140ms, for example the heat profile duration value is 5, which means 5*140ms=700ms.

[Julien1]

Ok thanks for the feedback, so the heat profile duration looks correct

And concerning the output rate:

handle_bsec_calls() is called every ~3 seconds

I get a gas estimate output wit accuracy = 3 every ~150 seconds, is it a normal behavior ?

[BSTRobin]

Hi Julien1,

As you used heater profile HP-354, you will get estimate output after 10.78 seconds.