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OpenTreat allows you to view and interact with your pets while not at home.

Watch a live video stream of your pet from your smartphone or laptop, and remotely dispense treats with the push of a button.

This a complete rewrite of my original OpenTreat project found here.

Overview

The treat dispenser system is built using a Raspberry Pi and 3D printed parts. When a user presses the button on the web app, it turns the servo motor for a certain number of seconds. This spins the middle piece and dispenses a section of treats into the bowl below.

Parts needed

  • Raspberry Pi
  • SG90 servo (or any 360* servo motor)
  • USB webcam
  • 3D printer

Physical assembly

  1. Download and 3D print each STL listed in the models folder
    1. The recommended print settings are in the Resources section below
  2. Assemble the parts using super glue
  3. Hook up the 3 servo wires to the Raspberry Pi’s GPIO pins
    1. The proper pinout is in the Resources section below

Device setup

  1. Image your Raspberry Pi with Raspbian
  2. Create a new user with the username admin
  3. Configure your WiFi network settings
  4. Enable OpenSSH

Download the code

git clone https://github.com/Un1xG0d/OpenTreat.git ~/OpenTreat
cd ~/OpenTreat

Install dependencies

sudo pip3 install -r requirements.txt

Set up username and password

The web app uses HTTP Basic Auth to secure the video feed.

Create a .env file in the root directory and update the values accordingly:

USERNAME=test
PASSWORD=test

This will be your username & password to login to the web app.

Automatic startup

Create a cronjob with sudo crontab -e to automatically set up and start the web app on boot.

@reboot /home/admin/OpenTreat/boot.sh

Port forward the app

Make sure to change your router settings to allow a port forward of port 3000 to your Raspberry Pi. This is what makes the web app accessible to the internet.

View the video stream

On your smartphone or laptop, browse to your router's external IP on port 3000 to view the video stream of your pets. Press the button to drop treats into your pets' bowl.

Resources

Recommended print settings

Scale: 100%
Infill: 10%
Layer Height: 0.2
Speed: Standard
Supports: None

RPi GPIO pinout

Red wire - Pin 1 - 3v3 power
Black wire - Pin 6 - ground
Orange wire - Pin 11 - GPIO 17

Pictures & screenshots