node-red-contrib-maps

A Node-RED node implemented by Openlayers 5 to show Iot measures

Description

This node package permit to use Openlayers map from Node-RED. The objective is create a new url for the map created, this url path could be configured and updated at runtime.

For the latest updates see the CHANGELOG.md

Installation

npm install node-red-contrib-maps --save

Map configuration

The Map attributes are:

• Path: The Map Url to be access. An example where path is MAP could be:

http://localhost:1880/MAP

• Tittle: The map title
• Payload: The map dataset object

The map payload attributes are:

• channel: The channel legend
• dataset: The map dataset

The payload dataset attributes are:

• lon: longitude point
• lat: latitude point
• description: descripion value
• value: value point
• unit: value unit
• color: color marker

Read node help to check the dataset structure for each chart. A Europe Temperature Map dataset could be like this:

[
    {
        "channel": "TEMP",
        "dataset": [
            {
                "lon": -3.703548,
                "lat": 40.417204,
                "name": "9fj04r",
                "description": "Temperature in Madrid",
                "value": 20.5,
                "unit": "°C",
                "iconColor": "Blue"
            },
            {
                "lon": -0.075906,
                "lat": 51.508319,
                "name": "04jgpe",
                "description": "Temperature in London",
                "value": 19,
                "unit": "°C",
                "iconColor": "Yellow"
            },
            {
                "lon": 2.34294,
                "lat": 48.859271,
                "name": "lfj82k",
                "description": "Temperature in Paris",
                "label": "Alert for strong frosts",
                "value": 11.7,
                "unit": "°C",
                "iconColor": "Red"
            },
            {
                "lon": 13.402786,
                "lat": 52.517987,
                "name": "0lw233",
                "description": "Temperature in Berlin",
                "value": 10.8,
                "unit": "°C",
                "iconColor": "Red"
            }
        ]
    }
]

Dependencies

Server side

• socker.io: socket.io server side
• serve-static: Serve static files
• cors: Node.js CORS middleware

Client side

• socker.io-client: Socket.io client side
• jquery: Multipurpose javascript library
• bootstrap4: Build responsive, mobile-first projects on the web
• popper.js: A kickass library used to manage poppers in the web applications
• Openlayers: OpenLayers makes it easy to put a dynamic map in any web page
• moment: Parse, validate, manipulate, and display dates and times in JavaScript.
• jsPDF: The leading HTML5 client solution for generating PDFs

Example

Under example folder you have a json flow to be imported in your node-red instance to test the nodes.