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This has been coded a publisher ( system_status Node ) which outputs a json encoded array, and a Subscriber ( LED_Display Node ) that decodes the system status array and sets GPIOs connected to LED ). Additional service calls may be added to the system_status publisher later.

This has been coded a publisher ( system_status Node ) which outputs a json encoded array, dictionary, and a Subscriber ( LED_Display Node ) that decodes the system status array dictionary and sets GPIOs connected to LED ). Additional service calls may be added to the system_status publisher later.