So you would like to build your pet feeding robot? Ntrobotics has shared a guide that shows you how to do just that. This 3D printed pet feeder is built using an Adafruit Feather HUZZAH with ESP8266 WiFi, Continuous Rotation Micro Servo – FS90R, and a few simple tools to get started.
This automated pet feeder can be controlled over the Internet. It can be programmed using Arduino IDE.
[Source]