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    BME280 multiple jumps in temperature below zero degrees

    BME280 multiple jumps in temperature below zero degrees

    rats
    New Poster

    My BME280 shows strange jumps in temperature if temperature goes below 0° C

    BME280.png

    5 REPLIES 5

    Jet
    Occasional Contributor

    Hi Sir:

       There are some questions to confirm with you.

        How many BME280 sensors did you test?

        Do you have a reference device to confirm the test temperature change?

        In normal ambient temperature, could BME280 get the correct values?

         Looking forward to your further information.

     

    I only have one BME280. As you can see in the chart, I have an additional SCD30 as a second sensor an I have an additional thermometer to verify the temperatures. If the temperature is above 0° C there are no temperature jumps as shown in the chart.

    Jet
    Occasional Contributor

    Hi Sir:

           Please see the following picture, which was from datasheet of BME280:

           Jet_0-1613721663284.png

           And BME280 temperature full accuracy range is 0--65° C.

        

     

    The official product flyer says: full accuracy between: -40 ... +85 °C:

    bme280.png

    Full accuracy aside, I would at least expect the sensor to function properly in the specified range. And below zero it does definitely not.

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