I blame this probably on my not super clear documentation.@SirMaster
Thank you so much for this program. I have been able to figure most of the things out with your program in my HT (MPC and Denon), but have difficult time figuring out JVC (I have RS500). Specifically those RS232 commands. If you can give me an example command to go by (eg. API URL and command line code Custom1 gamma slot ), I'd appreciate it.
I tried on my own, but am getting "device actively refused connection" error on API URL when I use this command.