Could you please share a code snippet of your project (at least BME280 configuration and data read-out)? From your description alone, it seems like you may trigger only one measurement (e.g. setting the BME280 to forced mode will trigger a single measure then go back to sleep mode), then reading-out this data sample multiple times.
Another questions I have is that I was wondering if you can provide the equations to convert analog signals to temperature/pressure/humidity. I cannot seem to find a clear equation in the datasheet or any sort of documentation.
You can find the reference implementation directly in the sensor API you linked (e.g. BME280 humidity formula in floating point).
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