Multi Sensor Stick

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@hel

The product description of the new sensor stick states:

In our testing, we’ve found that the BME280 sensor requires some burn-in time (at least 20 minutes) and that readings may take a couple of minutes to stabilise after beginning measurements

My own measurements show the opposite. The BME280 measurements are extremely stable and reproducible. I had run a large scale test with nine BME280 comparing them to three DS18B20 under various conditions. Sampling was one measurement every five minutes, power off in between. All measurements are within the limits that the datasheet claims and are near to what the DS18B20 give. No need for a burn-in time or stabilization time.

I think the problem is within the BME280 libraries you use. Your default configuration configures the sensor with filtering and oversampling, but the datasheet (“3.5 Recommended Operation”) states in the section “3.5.1 Weather monitoring” that neither filtering, nor oversampling should be used.

I would suggest re-testing with optimized settings. Of course there are other use-cases for the BME280 than weather monitoring (e.g. as a barometric altitude meter for indoor navigation), but I think most users will do some sort of weather monitoring with the BME280.

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I have numerous BME280’s scattered around the house. For me it’s weather monitoring, primarily temperature. I do monitor all three, temp, humidity and pressure. The pressure gives me an idea of what kind of weather we may get, good bad or ugly.

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Thanks - that note was copied over from the BME280 page, which was written some considerable time ago so I suspect the software side of things may have moved on. I’ve removed it for now.

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