Create a "State Aggregation" plugin?

[mStirner]

Can be used to create virtual sumarized states. (Combined with logical operations such as "and", "or", "average")

Examples:

• 2-3 Temp sensor values are combined into a single "average" state value.
• Window/Door Sensor are "and" linked into a single "open"/"close" state.
• Devices/lights state "power" "or" linked as a room state: "Lights on"

[mStirner]

Endpoint config example via labels:

[
  "plg.summarized.enabled=true",
  "plg.summarized.states[]=66b9be9cd52f0d80de2c50f3",
  "plg.summarized.states[]=66b9bea46331677165a1b18b",
  "plg.summarized.states[]=...",
  "plg.summarized.operation=average",
]

Or as json string?

[
  'plg.summarized.config={"enabled": true, "states": ["66b9be9cd52f0d80de2c50f3", "66b9bea46331677165a1b18b", "..."], "operation": "average"}'
]

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