Octo Print for controlling and monitoring 3D printing from Raspberry PI

Installing Octo Print on Raspberry Pi 3

1. Install a Clean Raspbian Lite
2. apt-get update
3. apt-get install python-pip python-dev python-setuptools python-virtualenv git libyaml-dev build-essential
4. cd OctoPrint
5. virtualenv venv
6. ./venv/bin/pip install pip –upgrade
7. ./venv/bin/python setup.py install
8. mkdir ~/.octoprint
9. sudo usermod -a -G tty pi
10. sudo usermod -a -G dialout pi
11. ~/OctoPrint/venv/bin/octoprint serve

Installing Camera Support on Raspberry Pi 3

1. apt-get install subversion libjpeg62-turbo-dev imagemagick ffmpeg libv4l-dev cmake
2. git clone https://github.com/jacksonliam/mjpg-streamer.git
3. cd mjpg-streamer/mjpg-streamer-experimental
4. export LD_LIBRARY_PATH=.
5. make
6. ./mjpg_streamer -i “./input_raspicam.so -fps 5” -o “./output_http.so”
7. edit-add a secition ~/.octoprint/config.yaml

   webcam:
   
    stream: http://<your Raspi's IP>:8080/?action=stream
   
    snapshot: http://127.0.0.1:8080/?action=snapshot
   
    ffmpeg: /usr/bin/ffmpeg
   
   

   system:
     actions:
     - name: Shutdown
       command: sudo shutdown -h now
       action: shutdown
       confirm: You are about to shutdown the system.
     - name: Reboot
       command: sudo shutdown -r now
       action: reboot
       confirm: You are about to reboot the system

8. auto-start camera streamercreate file: /home/pi/scripts/webcam

   #!/bin/bash
   # Start / stop streamer daemon
   
   case "$1" in
       start)
           /home/pi/scripts/webcamDaemon >/dev/null 2>&1 &
           echo "$0: started"
           ;;
       stop)
           pkill -x webcamDaemon
           pkill -x mjpg_streamer
           echo "$0: stopped"
           ;;
       *)
           echo "Usage: $0 {start|stop}" >&2
           ;;
   esac

   create file: /home/pi/scripts/webcamDaemon

   #!/bin/bash
   
   MJPGSTREAMER_HOME=/home/pi/mjpg-streamer/mjpg-streamer-experimental
   MJPGSTREAMER_INPUT_USB="input_uvc.so"
   MJPGSTREAMER_INPUT_RASPICAM="input_raspicam.so"
   
   # init configuration
   camera="auto"
   camera_usb_options="-r 640x480 -f 10"
   camera_raspi_options="-fps 10"
   
   if [ -e "/boot/octopi.txt" ]; then
       source "/boot/octopi.txt"
   fi
   
   # runs MJPG Streamer, using the provided input plugin + configuration
   function runMjpgStreamer {
       input=$1
       pushd $MJPGSTREAMER_HOME
       echo Running ./mjpg_streamer -o "output_http.so -w ./www" -i "$input"
       LD_LIBRARY_PATH=. ./mjpg_streamer -o "output_http.so -w ./www" -i "$input"
       popd
   }
   
   # starts up the RasPiCam
   function startRaspi {
       logger "Starting Raspberry Pi camera"
       runMjpgStreamer "$MJPGSTREAMER_INPUT_RASPICAM $camera_raspi_options"
   }
   
   # starts up the USB webcam
   function startUsb {
       logger "Starting USB webcam"
       runMjpgStreamer "$MJPGSTREAMER_INPUT_USB $camera_usb_options"
   }
   
   # we need this to prevent the later calls to vcgencmd from blocking
   # I have no idea why, but that's how it is...
   vcgencmd version
   
   # echo configuration
   echo camera: $camera
   echo usb options: $camera_usb_options
   echo raspi options: $camera_raspi_options
   
   # keep mjpg streamer running if some camera is attached
   while true; do
       if [ -e "/dev/video0" ] && { [ "$camera" = "auto" ] || [ "$camera" = "usb" ] ; }; then
           startUsb
       elif [ "`vcgencmd get_camera`" = "supported=1 detected=1" ] && { [ "$camera" = "auto" ] || [ "$camera" = "raspi" ] ; }; then
           startRaspi
       fi
   
       sleep 120
   done

9. Make it executable

   chmod +x /home/pi/scripts/webcam
   chmod +x /home/pi/scripts/webcamDaemon

Octo Print automatic Startup

sudo cp ~/OctoPrint/scripts/octoprint.init /etc/init.d/octoprint
sudo chmod +x /etc/init.d/octoprint
sudo cp ~/OctoPrint/scripts/octoprint.default /etc/default/octoprint

Edit /etc/default/octoprint

Remove comment from section:

DAEMON=/home/pi/OctoPrint/venv/bin/octoprint

sudo update-rc.d octoprint defaults

edit /etc/rc.local

add section

/home/pi/scripts/webcam start

 Usage

sudo service octoprint {start|stop|restart}

/home/pi/scripts/webcam start