7 of these devices equip aquariums with live fishes and corals.

I designed this fish feeder to have a large (and extensible) food tank, and an accurate quantity dispensing.

You can program up to 6 dispensing per day, easily could be increased but don't overfeed your fish ;) and chose the quantity for each.

You get a notification alert on your phone if the module disconnects (power outage…), or if no food was actually dispensed.

The firmware and Gerber files for the PCB are available here: https://github.com/reivaxy/iotFeeder, but you can probably fit an ESP8266 wemos D1-mini board + stepper driver board instead, but don't power the stepper driver from the ESP 5V pin, you would fry the onboard regulator.

Build instructions are here: https://github.com/reivaxy/iotFeeder/wiki

The back was printed using two colors (PRUSA MMU2s) to show reverse and forward arrows above the respective push buttons, but a strl for a back with no embedded arrows is provided too.

There are several options for the foot/clamp, depending on what is needed.