Roadrunner technical documentation
Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.
It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette that can be deployed to its runtime in a single-click.
The Node-RED comunity provides a script to install Node.js, npm and Node-RED onto Debian or Raspberry Pi OS.
This script can be used also for the RoadRunner. The script can also be used to upgrade an existing install when a new release is available.
Running the following command will download and run the script:
bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)
The install script for the Pi also sets it up to run as a service. This means it can run in the background and be enabled to automatically start on boot.
The following commands are provided to work with the service:
If you want Node-RED to run when the Pi is turned on, or re-booted, you can enable the service to autostart by running the command:
sudo systemctl enable nodered.service
To disable the service, run the command:
sudo systemctl disable nodered.service
Once Node-RED is running you can access the editor in a browser: http://roadrunner_ip_address:1880
Refer to the rich set of tutorial available on Node-RED website to learn how to use it
To install this node type this commands:
sudo apt update
sudo apt install python3-libgpiod
cd ~/.node-red/
npm install node-red-contrib-roadrunner
If you are running Node-RED as a normal user, be sure to give the necessary permissions to /dev/gpio0. One simple way is to save this text:
KERNEL=="gpiochip0", MODE="0666"
inside a file called:
/etc/udev/rules.d/60-gpiochip.rules
Then restart Node-RED:
sudo systemctl restart nodered.service
or
node-red-restart
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Please note that all of the software we talking about is Open Source so you have to check any license provided by the software authors before using it in any commercial or non-commercial product, by yourself.
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