@citizenjoe

Thanks Hugh, I should have indicated that up front. 

Best wishes

Russell

@aidan said:

PS I can receive data from the button (eg send letter 'a') via the Keyboard Watcher!

 I have used this button for a project in the past. I didn't even consider using HID, I simply did as you mentioned and used the Keyboard watcher. It worked great.

@mark_m very useful, thanks