Automatic pet feeders with app controls are nothing new. You can buy them on Amazon and many other sites. You can also build your own if you have a 3D printer and know electronics. Ntrobotics has shared a guide that shows you how to 3D print and build your own smart pet feeder.
More gadgets like this: here
DIY Project: IoT 3D Printed Pet Feeder
The pet feeder can be controlled over the Internet. Adafruit Feather HUZZAH with ESP8266 WiFi is used to control the device. Continuous Rotation Micro Servo [FS90R] is used to drive this pet feeder. Pretty cool project if you ask us.
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