It seems that the you set too much delay inside the main process. BSEC can only support ~6.25% tolerance for the sample rate which means if the system delay is over 0.18 second under LP mode, the BSEC act this measurement as the first measurement again. Accuracy is 0 during first run-in time which is 5min under LP mode. In this case, sensors are always in run-in time. Please use standard example code and no extra delay for the main process.
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