Pi Robot

Hardware

Full materials list

• Camera
• H-Bridge and 2 DC motors
• Ultrasonic sensor
• Battery/ power supply
• Frame, wheels and front axle
• Resistors: 1k and 2k for ultrasonic sensor

Wiring

• Ultrasonic sensor (from sensor to Pi):

  • VCC : 5V
  • GND : GND (ground)
  • Trig : Pin 16
  • Echo : Pin 18 (must be wired using potential divider with 330Ω and 470Ω resistors- wiring can be found online)

• Driving motors (from H-bridge to Pi):

  • Pin 1 : Pin 19
  • Pin 2 : Pin 11
  • Pin 3 : Pin 13
  • Pin 4 : Pin 15

• Power:

  • Select suitable power suppply for the Pi and motors

Software

• Camera:

  • Uses motion software
  • Installed through: sudo apt-get install motion

• Main script:

  • See main_app.py and edit variable pi_ip to your Pi's IP address and port to your Pi's motion hosting port
  • Dependencies:
    • Flask: pip install Flask
    • RPi.GPIO: pip install RPi.GPIO
  • This will then create a flask web server which can be acessed through your host's ip address on any port (default port is 5000). This will then prompt for username and password: default username = admin, default password = admin123. These should be changed and this can easily be done.

License and copyright

Copyright (c) Charles Calzia

Licensed under the MIT License