For broadcast/mac address to work - you need to set the netInterface configuration for the thing. For my X830c, it's either eth0 (for wired) or wlan0 (for wireless). The addon defaults to eth0 if none was specified. If you are connecting wirelessly, try specifying "wlan0" for that config setting. If neither of those works - try a few variants (eth1, eth2 or wlan1, wlan2 if wired or wireless). If none of those works, either your TV doesn't support them or they use some weird interface name (ath0?). At any rate, since none of this is documented it's kinda guess work. Play with them and report back your results if you would.
As for the audio volume (and some of the others as well), the next version will be a bit smarter in handling those. When the TV is off, many of the commands return errors (likewise, channel commands return errors when using hdmi). The current version of this binding just blindly submits everything regardless of state.