The rulebook decides how the farmer's phone, our server and the controller on the farm talk to each other. Pick a story, then step through it. The phone on the right shows what the farmer sees at each moment.
What this is. This is the design the rulebook writes down in step 2. It becomes working software in steps 3 and 4, and is then tested on the real YongAgri controllers on the bench.
The farm, the times and the readings are examples. The messages are drafts and may change before the rulebook is final. Times inside messages are in world time (UTC), so 6:00 in Sri Lanka is written 00:30.