Yeah, I already have the “mute” button, and it works. The logitech database is very complete and fullfills all my need. I don’t have to manage switching between devices, the remotes manages all by itself. I can tell it to send the mute command after powering the BenQ on. But the thing is that I want it to be done either when launching the projector individually, AND when powering it on through the “activities” macro functionnality. So far I haven’t managed to do it on both at the same time.
But this is a small issue. My other issues with the cover plate of the Odroid blocking the IR signals, and the impossibility to set the “Power on” function to wake it up are more important (As I said, I succeeded to power it on using “Power toggle” but not “Power on”, which would be better)