Strange reading from Barometric sensor on Crazyflie

Firmware/software/electronics/mechanics
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vestige
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Posts: 15
Joined: Wed Nov 06, 2013 6:06 pm

Strange reading from Barometric sensor on Crazyflie

Post by vestige »

HI
I currently trying to test the accuracy of barometric sensor on crazyflie i do it for my project. I just select only pressure in Baro configuration (logging baro.pressure) and what i got is the pressure is start up from 1013.4 - 5 mbar which is -1.2 to -1.5m i totally confuse because, what i just did is put on the floor 0m which pressure suppose to be 1013.25 mbar. What i have done it wrong is it problem with sensor?

Ps. I have update all the firmware and Client already
marcus
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Re: Strange reading from Barometric sensor on Crazyflie

Post by marcus »

Hi,

The measurements you are describing seems normal. The air pressure should be about 1013.25 mbar, but this will change depending on weather conditions, inside conditions etc. If there's a storm coming then the air pressure goes down.

In short, the barometer should not be used to get an absolute value. It should be used to get a relative value (i.e to see how much you move around).
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