I was never able to get Yamaha AVRs to work with CH either. This is on systems that previously were working flawlessly for years via IP on full fat Crestron. Serial and IR work, but no go on IP. ?IIRC, the latest Yamaha models use a different protocol, so that may be what the modules are based on. ?I don¡¯t think you are going to have any luck with these older models.?
