BME688 Upper limit of gas resistance value and step in graph

[yos]

Hello,

I'm trying BME688 and I have 2 questions about gas resistance value.

1. The resistance value at the low heating temperature in the steps of the heater profile seems to saturate frequently at 102400000. Does this mean that it reach the upper limit of the measurable resistance value?
Also, even if resistance reach the upper limit frequently like this, can it be used for training etc. as normal data?

2. When acquiring room air data, I often see a stepped gap in my graph. What could be the possible cause?

For reference, I attach a graph when measuring air.
I am using HP354/RDC1-0 with BME688 Development kit.
The red arrow points to the first question, and the blue arrows point to the second question.

[yos]

Hi BSTRobin,

I wanted to use HP with a short cycle time, so I tried assigning HP321, 323, 354, and 411 to 8 sensors, but all of them showed saturated values at low temperature steps.
It's been only 2 months since I started trying this development kit, is this an early failure?

[zrummler]

Did you ever solve this? I'm experiencing nearly the same issue.