Mounting external compass facing/arrow rearward

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1

Hi,

I want to mount my external compass facing rearward (see picture). How to compensate orientation correctly ? What is the best way to parametrize this ?
I don’t found any correct COMPASS_ORIENTATION for that. If I use Declination 180 degree it seems to be ok but I can’t use Autodeclinasion with that…

This is my actual parameter, but it’s bad because I can’t use COMPASS_AUTODEC.

COMPASS_ORIENT = 8 COMPASS_DEC = 3.142
Can you help me please?

APM:2.6 - FW:3.2 - QuadriCopter


(full size postimg.org/image/bqn1ryjz5/)

Thanks !

2

Set COMPASS_ORIENT to 4 for Yaw 180.

3

I had tried this, but look the compass behaviour with this value:
[youtube]https://www.youtube.com/watch?v=8WCI0x8CpBY[/youtube]

4

How does the compass respond when set up facing forward’s as it expects?

5

Perfectly when facing forward with COMPASS_ORIENTATION=8