Barometer with a BME280 module

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The BME280 can measure humidity, air pressure and temperature.

The air pressure changes relative to your height above sea level.

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Correction Factor = your height above sealevel in feet divided by 27.3

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How to set?

Press both buttons and turn on the power.

You will see a counter. As soon as you see the calculated number, release the buttons.

This number is written into memory.

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If you only press switch 1 at start-up, this "preset" will be deleted.

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The schematic is very simple.

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