RM3100 compass support

I am building a new antenna Tracker at the moment and I am using a Drotex M8N XL GPS+Compass module. But I would like to add a second Compass as reference and I tried to use several RM3100 compasses but none of them would be recognized.
Can someone integrate the support for it to AT firmware?

It is supported although you might have to jump on the latest version.

https://firmware.ardupilot.org/AntennaTracker/latest/

Sorry that was my fault. I installed the official version and there it seems not to be supported. Now it gets recognized! Thanks!