Feedback using hex (DirecTV)

I want to receive feedback from DirecTV receivers (current channel,
date/time, signal strength, etc...). So far I have everything working
great in commandfusion. The only thing I am having a problem with is
getting feedback. Basically, I want to hit a button on commandfusion
and have the channel number be displayed above the button or overlay
onto another one. I just need some direction as to go about doing
this...

Everything is hex.
The command to query the receiver for the current channel is \xFA\x87
The receiver will then send back \xF0\x01\xF6\xFF\xFF\xF4 for the
channel number (in this case it's 502)
or \xF0\x00\x05\xFF\xFF\xF4 if it were channel 5.

The only bytes that change are the 2nd and 3rd. (\x01\xF6 - for
channel 502) or (\x00\x05 - for channel 5).

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