BME280 wrong pressure

[LeosHusar]

Hello, I have recently bought 2 BME280 sensors and they are reading wrong pressure, I am getting 110 000 Pa from API.

They both have different trimming values and readouts but calculation shows similar result.

I tried to fill your Excel sheet for validating and it calculated 116 000 Pa - well, I don't think we have so high pressure here. Unfortunately I don't have any reference pressure meter, but still this seems high to me. What can be wrong? Also it's not returning the same pressure value every time, it's changing, so some readings must be happening there.

I'm also sending my Excel file with all of my values.

Thank you in advance!

[handytech]

Please note that the column "Type" indicates the signedness and number of bits for each trimming value. In the file you've shared, some of the trimming values for the pressure calculation exceed their maximum acceptable range (e.g. P2, P5, P6 and P8). Assuming the register values are correct but still need to be converted to their signed values, I believe the resulting pressure output would be in the range of ~983hPa instead.