Raspberry Pi CamJam EduKit 3 Web Controlled Robot With Video Stream

Raspberry Pi Robot that can be controlled via a website with a live streaming webcam using Flask

Adapted from James Poole's and Pablo Rogina's projects with changes as follows:

• Python 3

• CamJam EduKit 3 instead of LD293 IC + proto-board. Controlled by gpiozero using CamJamKitRobot API

• Raspberry Pi Camera v1

• MJPG-streamer streaming application instead of motion. Since it's less resource intensive, video responsiveness and quality improved noticeably

• Updated index.html page from Pablo Rogina's

• Added automatic running and killing of MJPG-streamer using subprocess.Popen

• Add catching of Ctrl-C using python signals with help from "Stack Overflow How do I capture SIGINT in Python?". Stops MJPG-streamer using Popen.terminate

Developed using VS Code with Visual Studio Code Remote - SSH extension, Python extension and Code Spell Checker extension.

Using VS Code (optional)

VS Code can remotely develop on the Pi, but it doesn't work on the Pi Zero. Setup by:

• Install VS Code on the remote PC from Visual Studio Code
• Install Visual Studio Code Remote - SSH extension
• To do finish

Installing Raspberry Pi Camera

https://www.raspberrypi.org/documentation/usage/camera/raspicam/raspistill.md 'raspistill --help' todo finish

Installing MJPG-streamer

Based on Michel Deslierres' instructions and mjpg-streamer:

• sudo apt-get install cmake libjpeg8-dev
• sudo apt-get install gcc g++
• cd
• git clone [email protected]:jacksonliam/mjpg-streamer.git
• cd mjpg-streamer/mjpg-streamer-experimental/
• make
• sudo make install

Get help with the Raspberry Pi input plug in: ` Test with:

• mjpg_streamer -i "input_raspicam.so -hf -vf -fps 10" -o "output_http.so -w /usr/local/share/mjpg-streamer/www/" &
• http:\\<pi address>:8080/?action=stream
• kill %1

Get input & output option help:

• mjpg_streamer -i "input_raspicam.so --help"
• mjpg_streamer -0 "output_http.so --help"

Important raspicam input parameters:

• [-fps | --framerate]...: set video framerate, default 5 frame/sec

Installing WebControlledRobot

From https://github.com/LegoChicken/WebControlledRobot:

• cd
• git clone [email protected]:LegoChicken/WebControlledRobot.git
• cd WebControlledRobot
• chmod a+rx app.py # Make executable

Running the robot

• ./app.py

To do

• Give a fixed size to the web stream.
• Improve LEGO strength
• Document camera above