Just want to say a quick thanks for this suggestion. I have two tanks (4 gal Pico and 20 gal Nano) and have been planning ahead for when we inevitably go on holiday or I need to travel for work. I picked up a couple of the Zacro feeders and they seem awesome (still need to spend some time taping up the dor to get the amount of food dispensed WAY down for a single Clown Goby in the 4 gal) but my biggest worry has been managing flow while auto feeding.
Timers and such are great in theory but keeping them in sync can be a pain and if one or another fails things can go a bit haywire. Also, being something that sits in a drawer 50 weeks of the year and only gets pulled out for holidays I want something with minimal points of failure.
I've started using Alexa smart controls for a bunch of other equip (I have my refugium lights set to turn on and off using Alexa smart plugs as well as a bunch of timers set up around my 3d printer equip) but I didn't tweak to the idea to use that for the feeders!
Having Alexa powered "smart feeders", means I can put my return pumps on Alexa smart-plugs and have them power off during feedings and back on after, and if both feeding and pumps are controlled by Alexa, I can get them to work in sync. I'll still have to use the Nero app to control my wavemakers, but it's removing an additional layer of complexity with the returns. Settings will all remain in the cloud, no worry about timings getting out of sync, and if wifi or power fails, once things come back up, the equip should automatically reconnect and resume functioning using the cloud settings.
Going to pick up a couple of these wi-fi feeders and have a play around. Dunno what to do with my Zacro's now though...