Basic LCD Display Plugin for OctoPrint

Simple Python script to update a LCD display with print data from OctoPrint on a raspberry PI

I wanted to have a read out on the OctoPrint setup so when I go out to the garage where the printer is I can see things like progress of the print. This document assumes you already have a Raspberry Pi running OctoPrint

These are the things I got from Adafruit.com to set this up:

• Half-size breadboard PID: 64
• Premium Male/Male Jumper Wires - 40 x 6" (150mm) PID: 758
• RGB backlight positive LCD 16x2 + extras - black on RGB PID: 398
• Assembled Pi Cobbler Plus - Breakout Cable for Pi B+/A+/Pi 2 PID: 2029

Here are the steps to set it up:

Wire up the LCD according to these instructions:

• https://learn.adafruit.com/character-lcd-with-raspberry-pi-or-beaglebone-black/usage
• Install AdaFruit CHAR_LCD libraries as shown in tutorial as well.
• You can type this at a command prompt: pip install requests ez_setup Adafruit_CharLCD

Open octoprint web interface.

• Select Settings->API
• Select enable
• Copy the Key

Connect to filesystem on PI (ssh or other method)

• Edit OctoPiLCD.py ( from shell: nano OctoPiLCD.py)
• On line 10 paste the value from above into key = 'Your key here'
• In nano: ^X to exit, Y to save, Enter to confirm name

Connect to filesystem on PI (ssh or other method)

• Edit ~/.octoprint/config.yaml
• If you don't have events add the following to the end of the file:
• Otherwise just add the PrintStarted Event:

events:
  enabled: True   
  subscriptions:    
  - event: PrintStarted  
    command: python ~/OctoPiLCD/OctoPiLCD.py
    type: system
    ```