The RGB LEDS communicate using a SPI-like communication which is modified in that it is unidirectional. The data and power for the LEDs is supplied by a STEMMAQT type connector the PDB, and the SCL SDA (SPI) lines have a second wire connector which attaches between the PDB and SPI port on MR-CANHUBK344
RGB LED wiring
The following image shows the LED lights setup with the left side representing the rear and the right side indicating the front of the car. This is pre-assembled.
If for some reason you need to re-create these connections, you should know that it is a daisy chain of STEMMA-QT type connectors, and that there is a marked IN and OUT connector on each of the LED light bars. The connections are from PDB -> IN(rear) -> out(rear) -> in (front)
Note that STEMMA-QT connectors are used but ABUSED and carry SPI signals not the normal STEMMA QT (I2C) signals.
Pre-Assembled lower chassis showing the left side (rear of the car) and the right side (front of the car).
Use the seven-pin JST-GH wire depicted in the picture below to connect from PDB to MR-CANHUBK344
Connect one end of the wire to SPI pin of the PDB.
LED wire pin connection on PDB
Connect other end to the SPI2 of the plastic case of the MR-CANHUBK344:
