Many-to-One modelling

General
1

Hi all,

I'm very new to Node-RED and I have a use case where many sensors (around 500) need to connected to a flow application in Node-RED.

  • Is there a way of modelling this many-to-one relationship in the flow-graph?
  • Is there any built-in support to differentiate the readings from different sensors coming into the graph?

Thanks.

2

It will depend entirely on how those sensors are connected. For example, if they are publishing their data via MQTT, then each would use a unique topic and you could have a single flow subscribed to all of those topics, using msg.topic to identify which device each individual reading came from.