I tried setting up a learning remote but it didn’t seem to accept any commands despite following the procedure.
Luckily I also have an old Logitech Harmony 200 which was basically a spare but I was delighted to see that I could teach the Harmony 200 all the commands from the Argon One remote, as well as add the Sony TV volume/mute commands.
Just wish the Argon remote had Back/Play/Fwd/Pause/Stop, that’d make the kit perfect.
Sorry it’s taken so long to start to look at this. Is the Micca device you are configuring the Harmony with called the Micca MPlay-HD? The Harmony app doesn’t like “Micca Media Center” or even “Micca Media”