MGL Avionics User Forum

Thanks for the time and info- that is the same setup as my customer.
I have asked him to check on the interface status LED to confirm if it is talking to both the EFIS and the txponder- no confirmation yet.
If that checks out it leaves the software version in the transponder, as I did note a comment from another user on the forum about needing an upgrade to get things working correctly.

I know I updated the all the software on my iEFIS, including the transponder software before I installed anything. That was probably Dec 2020. I notice there's a newer update but I haven't installed that as my transponder is working well. Perhaps your customer may benefit from it:

http://www.mglavionics.co.za/canfirmware.html