UI Creation With Node-RED

The layout algorithm of the dashboard always tries to place items as high and to the left as they can within their container - this applies to how groups are positioned on the page, as well as how widgets are positioned in a group.

UI creation with Node-RED

Sizes - sets the basic geometry of the grid layout in pixels. The width and height of widgets can be set, as can the width of groups. These are the basic definitions of the "units' used elsewhere within the dashboard.

You can also choose to use the basic Angular Material themes instead if you like, either just within any ui_templates or for the whole Dashboard. This will only affect angular components so some of the charts and so on may need extra work.

Template - the template node allows the user to specify and create their own widgets within the framework using HTML, Javascript. This is an Angular.js widget. You may also use this to override the built in CSS styles.

Due to the size of the dashboard libraries it can take a long time to load if you are running on wireless network. It is possible add a custom loading page if you wish. To do so add a file called loading.html to the node_modules/node-red-dashboard/dist/ folder. A simple example could be

It is important to note that no front-end, 3rd-party frameworks such as VueJS or REACT are needed for this approach! Everything uses vanilla HTML, JavaScript and CSS under the skin and so is compatible with current and future web standards.

The schema and the UI creator functions built into the front-end client are specifically designed to work with current and future HTML standards in order to avoid the kinds of issues commonly encountered when using 3rd-party front-end frameworks (e.g. major version changes forcing rewrites of all of your tooling). So ES Modules, ECMA Components, and future ECMA versions should all be supported.

Node-RED Dashboard is a module that provides a set of nodes in Node-RED to quickly create a live data dashboard. For example, it provides nodes to quickly create a user interface with buttons, sliders, charts, gauges, etc.

Build Web Server projects with the ESP32 and ESP8266 boards to control outputs and monitor sensors remotely. Learn HTML, CSS, JavaScript and client-server communication protocols DOWNLOAD

This was a great intro to Node-red. I highly recommend using this product if you have ANY wifi connected devices such as ESP8266, ESP32, and of course RasPi. When combined with MQTT you can do virtually anything.

Can we extend Angular's UI functionality where we overlap elements like button, text, image etc., over each other to make better looking UI. I don't want to use template node for any custom UI development. I want to make my own custom nodes to develop any custom UI. But node-red's wrapper around Angular leaves little flexibility in terms of setting layout of page and arrangements of widgets.I am just trying this and any suggestion towards solving the problem is appreciated.I hope I've detailed the problem

Freedom over your personal dashboard design comes with -red-contrib-uibuilder .node-red-dashboard and it's components are intentionally designed to be easy to use and look OK without spending too much time on it. If it had more freedom, it would probably require much more effort to build and then it loses it's powers. Take it as the prototyping tool if you like.

With uibuilder, you can develop anything you like and if you want to hide code from end users, simply include a build step in your workflow to hide away most of the code into components and javascript which is then compressed for you by your build tool. That also lets you chose the front-end framework you are most comfortable working with whether that is Vue (included by default), jQuery, Angular (including the latest versions not just v1), REACT or even hand-crafted.

Some nodes have taken it upon themselves to do some customisation that uses the internal structure which we completely reserve the right to change without notice as it isn't a published API. For example: node-red-contrib-image-tools (node) - Node-RED

That all said, I would like to see us produce some standardized way for customising a node's appearance beyond what can be done today with the established APIs (ie, colour and icon). But it isn't something we're actively working on today.

Thank you for a very useful tutorial on the Node-RED dashboard. I am just getting into using WeMos and ESP32 modules for home automation and Node-RED is looking to be a good tool for visualizing and controlling devices so the tutorial was spot on!. I am currently using Google Home minis via IFTTT and Adafruit.io to give word commands to WeMos and ESP32 devices (having looked at many less reliable/slower combinations). I am currently looking to replace the Adafruit.io route with Node-RED and Mosquito MQTT running on a Pi. Do you have any recommendations for doing it in a better or more direct way? Regards Steve

There are 3 main pieces of this code -checking that the external libraries are loaded (line 20-22), the creation of the Morris.Donut object and its initialization (lines 26-35), watching for new Node-RED messages and updating the chart (lines 37-49). All of this is wrapped in a function that accesses the Angular scope for this DOM object.

However, as can be seen, line 26 creates a new instance of the Morris.Donut object. Creation requires a minimum of an element (the HTML element that will be used for displaying the donut chart) and an array of data to display structured as . We create a dummy array with all values set to 1.

apiko-image-cropper.js - this file will be used by node red for registering your pallet and processing the server behavior. Here we will deal only with node.on('input', () => ... callback that will be called when we receive data from the previous pallets.

Node red stores all its files in the .node-red directory. Now you can view .node-red/pacakge.json and monitor all the packages (pallets) you connect. All you have to do now is to run node-red and check out if everything works perfectly well.

After we have registered new API point /apiko-image-cropper/js/, our code will look for the file main.js in pallets/apiko-image-cropper/ui/build/main.js. with the GET /apiko-image-cropper/js/main.js request. Now we have to call our request from the client.

In this article I have demonstrated how to develop a small project with Node-RED. Now you know how to set and organize both small and more prominent projects. I have also shown how to use React for UI part of node red. You can use this guide for other UI frameworks such as Vue js, Angular, etc.

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When we first introduced the Node-RED developer video series a few months ago, we started off with how to "Set up groov I/O nodes." Once you've installed and configured them, it's time to do something interesting with your data.

You can also trigger a node-red sequence from a lovelace card via svc2evnt custom component. I made a guide in swedish here: -node-red-flode-direkt-fran-home-assistant/ maybe google translates it well, if not ask and I will make a post in English.

How can I make charts with an X-axis of my choice? (e.g. send (x,y) pairs? It seems that the -dashboard charts are restricted to time of the event as the x-axis. Could I use the template and place some other chart inside? Example, please.

SCADAvis.io is an HTML5 toolkit that makes it easy to create SCADA-like synoptic graphics to be embedded in webpages code. It is based on SVG vector graphics created using an Inkscape customized editor. This editor allows for the markup of the SVG graphical objects with data-linked animations. Graphical properties like fill/stroke color, text, size, opacity, rotation, position, etc., can be tied to tagged data values for the creation of the SCADA-like graphics. Look at SCADAvis.io site for examples and documentation.

Thanks Iván.node-red-contrib-ui-svg appears to be great also, it is well integrated to Node-Red. It depends on the quantity and complexity of the graphics you need. For low complexity and low volume of graphics, I think node-red-contrib-ui-svg may be the most adequate choice.Best regards,Ricardo

Node-RED was initially developed by IBM and then contributed to the OpenJS foundation. Arguably the biggest strength of Node-RED is the ecosystem and community with over 14,000 stars on GitHub and a community library with over 3000 pre-built nodes and 2000 customizable flows that cover many common use cases.

As you might expect based on the name, nodes are an important part of Node-Red. They are the fundamental building blocks for everything you do when working with Node-Red. Nodes are triggered by either receiving a message object from a previous node or an external event like an HTTP request. The node processes the message or event and then passes it on to the next node.

Context within Node-RED is essentially the ability to define global variables that can be accessed by nodes directly rather than from within the message being passed to the node. Context can be scoped at 3 different levels. The first is node level, where only the node that set the value can access it. The second is flow level where the value is visible to all nodes within that flow. The final context level is truly global, any node within the Node-RED instance can access the value.

We will be passing a temperature number through MQTT to simulate some sort of IoT sensor recording air temperature. By default this will be passed as a string, so we need to create a function to convert it into an integer before storing it with InfluxDB. Add a function node to the page and put the following code into the node: 041b061a72