Cube Black Baro problems

Cube Autopilot
1

Hi

in my Octo APR in Coax configuration I made many test flights and all went well without problems

a few days ago I flew about 150 km from the test airfield and the Coax had a serious altitude problem. No Crash but after the first few minutes of flight he starts doing a yo-yo.
After an analysis of the log it is noted that 2 out of 3 barometers are perfect (BARO 2 and BARO 3) but one (BARO) is very different from the others

How do I solve it? … is it always better to adjust the pressure at each flight ?? (I hope not !!)

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2

There are only 2 internal baros in the Cube.
Can you tell which one is the external baro?

3

hi Alvin and thanks for the reply. As a GPS I have a Here V2 and via Uavcan I enabled Baro to have the external barometer located on GPS … correct?..

4

If you are using Here2 in serial mode, its baro will be detected by default. If using in CAN mode, you have to enable the baro.

5

the external Baro is enabled in Can (4-wire cable)
The problem is that I don’t know from the graph which is the cheater providing the false information

Baro = problems
Baro 2 = ok
Baro 3 = ok

so of these, which are the 2 internal Baros and which are the external Baros?
Logically, I would identify Baro and Baro 2 as internal and Baro 3 as external … is there a “map”?

6

Normally the ardupilot should assign external baro as primary baro, which is 0.

7

interesting … so it would be easy to disable it (Uavcan> Baro = 0)
Perhaps because the Baro was on value 1, that is, it had to use the learning of the pressure value through the procedure provided, i.e. set it to 2 and let the pressure be determined and then return to 1 to use the value read. Except that the procedure didn’t work and the value is always 0.
All this is interesting but I don’t understand why many flights went well and only the last two off-site went very badly …