Is there a config setting on the ZWA-2 that would enable 'keep alive' messages to be sent to a particular node? I have one old device (Greenwave power switch) that gets lonely if it's not spoken too for a while, and sits there flashing its network light, which is really irritating. My old Razberry 2 had this ability, but I can't see anything similar in the ZWA-2.
If it's not possible, I guess that I need to write an automation to have a little chat with it occasionally 
There is 3 things you can do every x minutes
- make Greenpeace report power
- ping device
- retrieve power values
I myself think first one is mist elegant.
I think that you may be correct; I'll set to work on it now.