Altitude reading

[green-creeper]

Hi, I'm comparing altitude reading from MSP and one I see in OSD. In static position they match move when I move drone the altitude increases, but slowly climbing back to 0 so that when I put the quad down it becomes negative and starts increasing. Any ideas what's happening?

In MSP reference I see this:

Maybe parsing is wrong and "vario" affects reading?

[green-creeper]

So, this seems error in multiwii documentation.
It looks like the altitude is in last 4 bytes instead of first 4.

I think this works

self.SENSOR_DATA['altitude'] = round((self.readbytes(data[6:], size=32, unsigned=False) / 100.0), 2)

[ricardodeazambuja]

@yannbouteiller, have you noted this before?

[yannbouteiller]

No but I encountered issues with altitude on several occasions, might be related.