OctoPiCharLCD
Show OctoPrint status on a character LCD display
This app will show some status info for OctoPrint on a 20x4 character LCD display. The LCD display is connected to Raspberry Pi GPIO pins and the data is pulled from the OctoPrint API.
Note: Now requires Octoprint version 1.2 or higher due to changes in the Octoprint software API key requirements.
Installation
ssh into your Octoprint machine as the 'pi' user
Install required packages
sudo apt-get install build-essential python-dev python-smbus python-pip git
sudo pip install rpi.gpio
sudo pip install requests
Clone the repository
cd /home/pi
sudo git clone https://github.com/matt448/OctoPiCharLCD.git
Create symbolic links for startup scripts
sudo ln -s /home/pi/OctoPiCharLCD/octolcd.py /usr/bin/octolcd
sudo ln -s /home/pi/OctoPiCharLCD/etc/init.d/octolcd /etc/init.d/octolcd
Edit octolcd.cfg config file and set apikey to value from Settings > API
vi OctoPiCharLCD/octolcd.cfg
Start up the service
sudo service octolcd start
Screenshot
LCD Wiring
This is the wiring for the very first Raspberry Pi. Newer models may be different. If different pins are used on the RPi you will need to edit the pin numbers in the octolcd.py script.
| LCD Pin # | LCD Pin Desc | Connection |
|---|---|---|
| 1 | GND | Ground |
| 2 | 5V | 5V |
| 3 | Contrast | Center pin 10k pot |
| 4 | RS | RPi GPIO #25 |
| 5 | R/W | Ground |
| 6 | EN | RPi GPIO #24 |
| 7 | Data Bit 0 | NOT USED N/C |
| 8 | Data Bit 1 | NOT USED N/C |
| 9 | Data Bit 2 | NOT USED N/C |
| 10 | Data Bit 3 | NOT USED N/C |
| 11 | Data Bit 4 | RPi GPIO #23 |
| 12 | Data Bit 5 | RPi GPIO #17 |
| 13 | Data Bit 6 | RPi GPIO #21 |
| 14 | Data Bit 7 | RPi GPIO #22 |
| 15 | LCD Backlight +5v | 5V |
| 16 | LCD Backlight GND | Ground |