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koenkooi / multiwii-firmware

Firmware - GitHub mirror of the official SVN multiwii project
https://github.com/multiwii/multiwii-firmware/wiki
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BMP085 Accuracy #9

Open gromain opened 10 years ago

gromain commented 10 years ago

There seems to be a drift in the altitude values reported by the BMP085. To be investigated.

koenkooi commented 10 years ago

The bmp085 is very sensitive to temperature changes, it could be that the board is heating up when powered on. Does it still drift after you have it powered on for a few minutes and then power cycle it?

koenkooi commented 10 years ago

This explains what I tried to say much better: http://www.multiwii.com/forum/viewtopic.php?f=8&t=4059

koenkooi commented 10 years ago

I've hooked up a sparkfun BMP085 breakout board to a aruino mega and flashed multiwii and I see a similar drift when it's heating up due to direct sunlight.