node-red-node-geofence 0.1.0

A simple node to filter based on location

npm install node-red-node-geofence

Geofence node for Node-RED

This uses the geolib node to check if points fall with in a given region. Points are taken from the first of the following msg properties in this order:

  1. msg.location.lat & msg.location.lon
  2. msg.lat & msg.lon
  3. msg.payload.lat & msg.payload.lon

Region can be circular, rectangular or polygons and are drawn on to a map in the config node.

screenshot of config node

Messages can be filtered depending on if they fall inside or outside the given region or the node can append the node name to a list of areas the msg falls in (to allow the chaining of geofence nodes).

The list is stored in msg.location.isat in the following format:

msg.location: {
    inarea: true,
    isat: [
      'firstArea',
      'secondArea'
    ],
    distances: {
      'firstArea': 100,
      'secondArea': 15
    }
}

And also includes the distance in meters from the centre (or centroid for polygons) of the region.

The config node uses leaflet and openstreetmap data so requires internet access. You can drop back to a non graphical config by replacing geofence.html with geofence-nomap.html

Possible breaking changes moving from version 0.0.x to 0.1.0.

These are arround the "add 'inarea'" mode

  • msg.location.inarea is always a boolean and now just reflects the last geofence node that the message passes through
  • msg.location.distances is now just an object using the name as a key, rather than an array of objects

Node Info

Version: 0.1.0
Updated 2 months, 1 week ago
License: Apache-2.0

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Nodes

  • geofence

Keywords

  • node-red
  • geofence
  • location

Maintainers

  • hardillb
  • dceejay

Contributors

  • Benjamin Hardill
  • Dave Conway-Jones