Final answer:
Yes, it's true that by placing an Auxiliary Repeater in the pool house and connecting it with a GRAFIK Eye cable to the RS485 link of the Main Repeater, you can extend the RadioRA2 system's range to include the pool house.
Step-by-step explanation:
It is true that you can add an external pool house to the RadioRA2 system, which is 600ft/183m away from the main house, by installing an Auxiliary Repeater in the pool house. You would then run a GRAFIK Eye cable from the RS485 link of the Main Repeater to the Auxiliary Repeater to establish wired communication and extend the system's range. This setup allows for the integration of lighting, shades, and temperature control in the external pool house within the same RadioRA2 system used in the main house.