> Warning: This is for users with advanced knowledge! If you make a fault, it could destroy your instrument cluster, arduino or other components! Do this at your own risk! I do not accept any liability for your damages!
> You need the following knowledge to get this done:
> * Basic knowledge in electronics (resistors, transistors, such stuff)
> * Basic knowledge in reading electronic schematics
> * Good knowledge with arduinos in general and the arduino IDE

Games supported in latest version:

• ProjectCars
• iRacing
• ETS2 & ATS
• RaceRoom Racing Experience
• Farming Simulator 22 (only with advanced game plugin from <#1346462400278429727> )

All other games that are supported by simhub have a basic functionality.

Programmed functions of the cluster:

• Speedometer up to 300km/h
• RPM
• Fuel (with Servo modification)
• Lowbeam
• Highbeam
• Cruise control
• Indicator left & right
• Cluster night mode with red background light
• Parkingbreak
• Oilindicator
• Batteryindicator
• Oilpressure
• Watertemperature
• DSC warning indicator
• DSC error indicator
• ABS indicator
• Engine error indicator

Part list:

• Mazda RX8 Instrument Cluster as you can see in the picture on the second post
• Arduino Mega 2560
• Servo for fuel gauge
• CanBus Shield with MCP-Can library (other ones may work also, eventualy you have to adjust the code to the needs of your shield)
• 12 volts power supply (for the cluster)
• 5 volts power supply (for the arduino)
• Arduino relay module with at least 8 relays
• Wires

Files you have to download:

In this boardpost you can find the changelog and latest files for this project. In the .ZIP-File there is a schematics in PDF so that you can figure out how to wire everything up. Also there is the nCALC-Formular that needs to be added as customcode for the device in the arduino tab of simhub. And last but not least there is the arduino sketch that needs to be uploaded to your arduino.

Librarys you have to install in the default Simhub Arduino IDE:

Use the default Arduino IDE that was installed already with simhub, then you just have to add two more librarys for the upload to the Mega:

• PWMServo
• MCP Can
• Threads

Fuelgauge Mod:

To get the fuelgauge working correclty you have to replace the original drive for the gauge with a servo directly controlled by the arduino. This is because of the clusters are delaying the incoming signals from the original fueltank resistors that much, that it wouldn't be possible to simulate it correctly with default hardware.

You can also just skip this modification, if you don't want to have a working fuel gauge.

To replace the original drive you have to open up the cluster! You have to desolder the original drive. After you removed the it, you need to glue the original shaft into the shaft of the servo. At the last step you should glue the servo to the clusterboard.

Changelog:

• March 2025: Changed the code to get rid of the sharedata plugin