node-red-contrib-priority

Priority-based signal selector. Outputs the value from the highest-priority active topic. Typical use: hand/auto/BMS override hierarchy in building automation.

Install

npm install node-red-contrib-priority

Usage

Send values with the configured topic names. The node outputs the value from the active input with the lowest priority number (1 = highest priority).

| msg | Effect | |-----|--------| | msg.topic = "hand", msg.payload = 75 | Hand override input | | msg.topic = "auto", msg.payload = 50 | Automatic control input | | msg.reset = true | Clear all stored values |

An input is considered inactive when its value equals the configured nullValue (default: empty string) or is null/undefined.

Output

msg.payload = value of the highest-priority active input.

{
  "priority": {
    "winner": "hand",
    "winnerPriority": 1,
    "value": 75,
    "inputs": {
      "hand": { "value": 75, "priority": 1, "label": "Hand", "active": true },
      "auto": { "value": 50, "priority": 2, "label": "Auto", "active": true }
    }
  }
}

License

MIT — sr.rpo