QtCreator QML based OBDII connected Mercedes gauge cluster. Uses a PCAN hardware device to poll engine data and render the OEM styled gauages.

Raspberry Pi based Digital Gauge Cluster

Projects used to setup Ubuntu for development and cross compiling:

• https://github.com/UvinduW/Cross-Compiling-Qt-for-Raspberry-Pi-4
• https://www.interelectronix.com/configuring-qt-creator-ubuntu-20-lts-cross-compilation.html
• https://www.interelectronix.com/qt-515-cross-compilation-raspberry-compute-module-4-ubuntu-20-lts.html
• Original inspiration from https://github.com/joshellissh/pi-dgc

Project info

Originally I was going with a setup like @joshellissh was using for his digital cluster gauage (V1), but I needed to rebase my project to QtCreator QML. The main reason is I needed to be able to render a vertical style cluster gauge and QML supported rotating the display out of the box. I worked from the example project included with QtCreator to customize the gauage to my needs.

Setup steps on Buster Lite:

• raspi-config / Boot Options / Console Autologin
• sudo apt-get install libgles2
• sudo apt-get install --no-install-recommends xserver-xorg x11-xserver-utils xinit
• sudo apt-get install --no-install-recommends chromium-browser
• sudo apt-get install unclutter
• sudo apt-get install default-jdk
• Follow all steps on http://skpang.co.uk/catalog/images/raspberrypi/pican/PICAN3_UGA_10.pdf to setup/enable the PiCAN3
• Follow instructions on https://www.raspberrypi.org/forums/viewtopic.php?t=24679#p227301 to set the proper resolution
• mkdir ~/pidgc
• Put bin/pidgc.jar into ~/pidgc folder
• Copy config.ini into ~/pidgc folder
• Edit /boot/config.txt. Add:

initial_turbo=60
disable_splash=1
boot_delay=0

• Add quiet fastboot to /boot/cmdline.txt
• Copy contents of linux/network_interfaces from repo into FILE /etc/network/interfaces
• Add contents of linux/.xinitrc from repo into file ~/.xinitrc
• Add contents of linux/.bash_profile from repo into file ~/.bash_profile
• Copy contents of linux/pidgc.service from repo into file /etc/systemd/system/pidgc.service
• sudo systemctl enable pidgc.service
• sudo /sbin/ip link set can0 up type can bitrate 500000
• sudo adduser pi dialout
• Disable unused services once everything is done. This decreases boot time substantially:
  • sudo systemctl disable ssh
  • sudo systemctl disable hciuart
  • sudo systemctl disable nmbd # If you have samba installed
  • sudo systemctl disable smbd # If you have samba installed
  • sudo systemctl disable systemd-timesyncd
  • sudo systemctl disable wpa_supplicant
  • sudo systemctl disable rpi-eeprom-update
  • sudo systemctl disable raspi-config
  • sudo systemctl disable networking
  • sudo systemctl disable dhcpcd

Now when you reboot the system should start into startx and run Chromium with http://localhost:8080.