Compass #2 no detected

Hi everyone,

i want to use 2 compasses for my drone (Dropix + “NEO-M8N GPS + LIS3MDL Magnetometer”). I plug the GPS on the Dropix port. In the “full parameter list” on Mission Planner, there is a “0” on “COMPASS_DEV_ID2”. I used an old and an new GPS but the problem go on.
How can i do o solve this please?

Which Copter version are you using ? LIS3MDL is supported only in Copter 3.5.4 and above.
You also have to check the connection’s pinout.

I use 3.6.10 version. I remove the ABS protection and I don’t see any problem on pinouts