Rather than use an external broker like mosquitto with node-red you can install Mosca which is a MQTT broker written in node.js. Because Mosca isn’t part of the core nodes you need to install it using the npm package manager or through the Node-red Admin control panel.
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Installing and Starting Node-Red
Installing Node Red Node-Red is a node application and before you Install node red you will need to first install node. Here are the instructions: Installing Node on Windows Installing Node on Linux Using a Package Manager Then you can Install node red on Windows and Linux (including raspberry pi) using:
Continue readingCreating Flows- Node-Red Admin Basics
To administer node-red you will need to go the admin url. The admin url is the machine name or IP address followed by the port number. e.g 127.0.0.1:1880/ if you are running the browser on the same machines as node-red. localhost:1880/ – steve-laptop:1880/ when running node-red on a remote machine 192.168.1.154:1880/ I currently run node-red on a Raspberry Pi and use a second machine (windows 10) to create flows. Using The Node Red Admin User Interface (UI) When you open the node-red admin screen for the first time you should start with an empty work space as shown in
Continue readingHow to Create a Basic Node-Red Dashboard
The node red dashboard is an add-on module that lets you create live dashboards. It is an optional module and not installed by default. Here are the install instructions and a brief description of what it does.
Continue readingHow to Export and Import Flows-Node-Red
Node red makes it easy to save, share and move flows between computers using the export and import feature. Flows are exported as a JSON file and imported from a JSON file. You can export parts of a flow or the entire flow or even all flows.
Continue readingConfiguring the MQTT Publish and Subscribe Nodes in Node-Red
Node-Red provides both an MQTT subscribe (input) and publish (output) node. The configuration for these nodes are almost Identical as the main part of the configuration concerns the actual client connection. Because of this it is useful to think of the publish and subscribe nodes as consisting of two components as shown in the schematic below: Before we look a the actual configuration we will look at MQTT client connections in general.
Continue readingSecuring Node-Red with SSL and Username Authentication
Out of the box your connection to node-red is insecure. If you are exposing node-red to the Internet or just want a more secure installation then you can: Enforce an SSL connection. Require Username and Password Authentication
Continue readingStoring Data in Node-Red Variables
Node-red nodes pass the msg object between nodes. However this object is replaced by the next msg object. So how do you store data between node calls? Node-Red provides three mechanisms: The context object -stores data for a node The Flow object – stores data for a flow The global object -stores data for the canvas
Continue readingUnderstanding The Node-Red Message Object
A node red flow consists of a series of interconnected nodes.(wired nodes). All nodes must have an input and can have 0 or multiple outputs. Nodes exchange data between each other using the msg object.
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