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Modbus and Bluetooth data sending to Node-RED (view source)
Revision as of 16:27, 12 January 2023
, 16:27, 12 January 2023no edit summary
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==Introduction==
<span style="color: red;">The information in this page is updated in accordance with the <span style="color: #0054A6;"><b>RUTXXX_R_00_07_03</b></span> firmware version.</span>
Node-RED is a flow-based programming tool developed by IBM Emerging Technology and written in Node.js. It provides a browser-based editor for wiring together hardware devices, APIs, and online services using a visual programming interface.
This article provides an extensive configuration example with details on how to use Node-RED with Teltonika Routers via MQTT and HTTP protocols.
==Configuration overview and prerequisites==
Before we begin, let's overview the configuration that we are attempting to achieve and the prerequisites that make it possible.
Prerequisites:
*Teltonika RUTXXX router or TRBXXX gateway. We are going to use the RUTX11 in this example.
*At least one end device (PC, Laptop, Tablet, Smartphone) to configure the devices.
*Linux Virtual Machine to host Node-RED server.
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There are a couple of different use cases with Node-RED and Teltonika devices and here are the connection topologies for these use cases.
Topology 1 – Modbus data to server using either Node-RED or Teltonika device as MQTT broker.
Topology 2 – Bluetooth data to server using Teltonika device as MQTT broker.
Topology 3 – MQTT gateway using either Node-RED or Teltonika device as MQTT broker.
Topology 4 – HTTP data to Node-RED server.
''Italic text''
==Node-RED installation and setup==
We are going to set up Node-RED in Linux virtual machine. For Node-RED to work, you would need to install Node.js version 14.00 or higher, if you already have Node.js installed, verify Node.js version using this command:
<pre>
node -v
</pre>
If you do not have Node.js installed, run these commands to install it:
<pre>
sudo apt install curl
curl -fsSL https://deb.nodesource.com/setup_14.x | sudo -E bash –
sudo apt-get install -y nodejs
</pre>
Once we have Node.js installed, we can install Node-RED. Use this command to install:
<pre>
sudo npm install -g –unsafe-perm node-red
</pre>
Use the command ''node-red'' to start a local server. Here is how the terminal should look like if the server starts correctly:
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Once you have the local server running, use the local IP and port number in your internet browser. In this case, we are using 127.0.0.1:1880. For MQTT usage, we are going to need MQTT-specific nodes. Use the side menu to navigate to Manage Palette section and install these nodes:
*node-red-contrib-aedes
*node-red-contrib-mqtt-broker