Hi Boersma,
i saw your thread with your question for a USB/BT etc. solution in the SC.
I am still searching since a few years and tried many different interfaces, but nothing works. My last try in 2021 was a Dension Gateway 3 Lite GWL3TO1. Of course, it doesnt work. I have the same radio as yours with the same part number and the same two (only two) connectors (without the 3rd important connector like other radios).
Did you really got an interface to run? Its really the newer GBL3TO1 from Dension. It will be so great. Or do you have meanwhile an other radio and thats the reason, why the Dension runs?
I hope for a reply and wish you all the best.
Thx and greetz from Germany,
Ben