ModeUSB=MD2;ModeUSB_D=DA1;DA1 sets "Data" mode but does not switch transmission mode. I believe it should be: ModeUSB_D=MD2;DA1;ModeUSB seems to be good.VarAC_cat_commands.zip downloaded approximately 20:45 27-JUL-2022 UTC.
Does DEBUG mode log the CAT strings being sent to the radio? Where is that file stored? Something strange is happening as I change frequencies.