My fork (and the original pioneer) component does use the telnet/rs232 interface (AVR 2010, I think it’s called (and is listed at the bottom of the link you gave). The HTTP interface on some models seems to be basically just the same protocol, but using HTTP to send requests.
It would be good if we could compile a list of which receivers need which component. I may add a page on github.
From a quick google search, I think the VSX-1130 might use the same protocol (port 8102) and the 1131 might use a different protocol (eISCP, same as the Onkyo component) and port (port 60128). https://forums.indigodomo.com/viewtopic.php?t=16996