Hi, I hope somebody may be able to supply me with the ir codes for the comcast xr2(v3?) remote control volume codes that control the volume on the rng150n cable box itself. I have the analog outputs connected directly to powered speakers. I plan to enter the codes as custom buttons on a universal remote control app that allows for that. I appologise that I'm not asking directly for an Arduino project, but this is the only search result that was remotely on target. I had planned on getting into Arduino as a universal snow plow controller, but I didn't anticipate registering here about a tv remote. Any help is appreciated. I know very little about ir remotes. I am reading up now. My phone app allows for entering data as comma separated values, and as (I think it looks like) hexidecimal values.
Have a look at the IRremote library. Sample code is included for figuring out the codes sent by a remote control.