I had an idea that I might want to try a foot pedal with Keyboard Maestro, and went looking for a Bluetooth one on Amazon.
I found the AirTurn QUAD200 Silent Bluetooth Pedal Page Turner Media App Control Foot Pedal which has 4 pedals, and I assume that Keyboard Maestro might be able to use it as a trigger, but it’s pretty much impossible to tell without buying it and testing it out.
Unfortunately, for some reason the product is marked as “Non Returnable” for Amazon¹. At $120, it's a bit much to buy on a gamble, as I would have no other use for it if it did not work for my desired purpose.
¹ (which doesn’t even seem like something that should be allowed, presuming that the item is returned in “like new” condition within a reasonable amount of time… but we have almost no consumer protections in the USA, so )
So I wondered if anyone had any experiences with this device or others like it.
A google search did not turn up anything even remotely relevant.