03-20-2023 06:05 PM
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 ?
05-05-2023 12:01 PM
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.
05-05-2023 02:31 PM
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 ?
05-31-2023 09:57 AM
Hi Julien1,
As you used heater profile HP-354, you will get estimate output after 10.78 seconds.