node-red-contrib-multi-stat 1.0.1

Node-RED multi-source statistics - calculates min/max/avg across multiple topics

npm install node-red-contrib-multi-stat

node-red-contrib-multi-stat

Node-RED Multi-Source Statistics - calculates Min/Max/Avg across multiple topics.

Features

• Aggregates values from multiple sources (topics)
• Calculates Min/Max/Avg in real-time
• Configurable decimal places
• Minimum topic count before first output
• Reset and remove via msg

Behavior

• Each source is identified by msg.topic
• Stores only the latest value per topic (no history)
• On each input: update value → recalculate statistics → output

Example

Input: topic="room1", payload=21.5
Input: topic="room2", payload=19.8
Input: topic="room3", payload=23.1

Output:
{
  min: 19.8,
  max: 23.1,
  avg: 21.47,
  count: 3,
  values: { room1: 21.5, room2: 19.8, room3: 23.1 }
}

Configuration

Input

• msg.payload - Numeric value
• msg.topic - Required - Unique source ID

Runtime Overrides

Output

{
  "min": 19.8,
  "max": 23.1,
  "avg": 21.47,
  "count": 3,
  "values": { "room1": 21.5, "room2": 19.8, "room3": 23.1 }
}

Use Cases

Node Status

• Idle - Waiting for data
• Waiting (1/3 Topics) - minTopics not yet reached
• 3 Topics | Min 19.8 Max 23.1 Avg 21.5 - Active statistics

Author

sr.rpo

License

MIT