I go from board to board with 4 wires for I2C being sure the last board has the pull up resistors.
Posting an annotated schematic would help, the picture does not match what you are saying.
I go from board to board with 4 wires for I2C being sure the last board has the pull up resistors.
Posting an annotated schematic would help, the picture does not match what you are saying.