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Arduino OPTA native I2C
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OPTA AUX connector uses I2C to control expansion modules.
Use a standard 2mm pitch 5 pin cable female JST PH connector, insert two pins into connector to contact OPTA expansion pcb rightmost 2 pins. If using external 5V power supply for LCD, common ground to 24V OPTO supply.
Use a standard 2mm pitch 5 pin cable female JST PH connector, insert two pins into connector to contact OPTA expansion pcb rightmost 2 pins. If using external 5V power supply for LCD, common ground to 24V OPTO supply.