Please read text project.
I use ST microcontroller STM32F103 and STP16CPC26XTR (16 channels led driver controller)
The software can receive information via RS485 (serial port) and CAN BUS. You can receive 5 frames:
Left Text (5 ASCII char) (5 bytes)
Right Text (5 ASCIIchar) (5 bytes)
State of linear bar, state of curved bar and state of arrows and central LEDs (2 Bytes)
Brightness level (1 Byte). General Adjust PWM (10 steps 10%-100%)
State requirement. Returns the model and serial number (2 Bytes).
CAN BUS Frames is similar but on canbus interfase.
Microcontroller programming. Send source code.