That's how I did it. I set up an activity to press the channel number buttons (i.e., press 8, press 6, press 5) and named the activity "ESPN". Then I set this up in IFTTT. I then say "Alexa, trigger ESPN" and it will change the channel. I set up an activity for a few favorite channels. This is really only convenient for me if I'm doing something else and want the TV on. If I'm on the couch, I use the remote. Word of warning- if I turn the tv on with the hub / alexa, then shut the TV off with my Tivo Remote, (I don't have the harmony remote, just the hub) the hub doesn't know the tv is off. So if I then say "Trigger TV on", nothing happens as the hub thinks the tv is still on. I then tell alexa (or use the harmony app) to shut the tv off, then turn on. Hope this helps.