After several tests to find a good mechanism to dispensing cat/dog food, I could bring my initial idea to control the dispenser using Alexa voice command. I can also serve food far from home using Alexa app.

The Pet feeder in action can be seen here
https://www.youtube.com/watch?v=aF1oW6MEi0k


Alexa library used was the FauxmoESP https://bitbucket.org/xoseperez/fauxmoesp/src/master/ and a routine created on alexa app.

And a modified Servo TowerPro MG996 to allow 360o rotation.

For the printed parts, I used the design made by Alexander Ulitin found here: https://cubebrush.co/momwillbeproud/products/ndqc7a-5FoB