In message , R.Wieser
 writes
>Is the sensor supposed to be able to give that different results (internet
>shows 1008, 1009 hPa around my position, the sensor shows 1000.47) ?    I
>thought that the calibration process and resulting data would not allow for
>it ?    What might be causing it ?
>

Are you allowing for altitude ?.  I was confused with my BME280,
thinking it was under reading until I did a bit of reading up.
Pressures usually seem to be quoted at sea level, and as you climb, the
pressure drops.  I'm at about 100M above sea level, and I was surprised
by the drop over that height.

Adrian
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