Prerequisites

Install Raspberry Pi OS to SD Card on Mac Using Terminal. Terminal is a stock app on Mac when the users want to complete tasks from text command. It is totally free and you have to type a few commands combined in order to install Raspberry Pi OS to SD Card on Mac. It does the same as UUByte DMG Editor but without a visual interface. Yes, you do understand correctly - Raspberry Pi does not run OS X. OSX is compiled for Intel chips; the Pi uses ARM chips. You are confusing OS X and Linux. Both are based on an old operating system called Unix, which is pretty much the mother of all OS's. I may be wrong, but even Windows has a bit of Unix mixed in. Perform a headless install of the Raspberry Pi OS desktop; enable and install a VNC server on a Raspberry Pi; install a VNC viewer on your computer, smartphone or tablet; connect to a remote desktop over VNC; Related Articles. Here is a list of my related articles that you may find interesting. Install NOOBS on a Raspberry Pi; Now you’ve got all the pieces together, it’s time to install an operating system on your Raspberry Pi, so you can start using it. Raspbian is the official OS for the Raspberry Pi, and the easiest way to set up Raspbian on your Raspberry Pi is to use NOOBS (New Out Of Box Software).

If you are using Raspberry Pi OS, Buster is the currently supported version.

Installing and Upgrading Node-RED

Install

We provide a script to install Node.js, npm and Node-RED onto a RaspberryPi. The script can also be used to upgrade an existing install when a newrelease is available.

Running the following command will download and run the script. If you wantto review the contents of the script first, you can view it on Github.

There are extra parameters you can pass to the script. Add --help to the above command to see them.

This script will work on any Debian-based operating system, including Ubuntuand Diet-Pi. You may need to run sudo apt install build-essential git curlfirst to ensure npm is able to fetch and build any binary modules it needs to install.

This script will:

  • remove the existing version of Node-RED if present.
  • if it detects Node.js is already installed, it will ensure it is at least v12. If less than v12 it will stop and let the user decide whether to stay with Node-RED version 1 - or upgrade Nodejs to a more recent LTS version. If nothing is found it will install the current Node.js LTS release using the NodeSource package.
  • install the latest version of Node-RED using npm.
  • optionally install a collection of useful Pi-specific nodes.
  • setup Node-RED to run as a service and provide a set of commands to work with the service.
Node-RED has also been packaged for the Raspberry Pi OS repositories and appears in theirlist of 'Recommended Software'. This allows it to be installed usingapt-get install noderedRaspberry and includes the Raspberry Pi OS-packaged versionof Node.js, but does not include npm.

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While using these packages is convenient at first, we strongly recommendusing the install script above instead.

Running locally

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As with running Node-RED locally, you can usethe node-red command to run Node-RED in a terminal. It can then be stoppedby pressing Ctrl-C or by closing the terminal window.

Due to the limited memory of the Raspberry Pi, you will need to start Node-REDwith an additional argument to tell the underlying Node.js process to free upunused memory sooner than it would otherwise.

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To do this, you should use the alternative node-red-pi command and pass in themax-old-space-size argument.

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Running as a service

Install

The install script for the Pi also sets it up to run as a service. This means itcan run in the background and be enabled to automatically start on boot.

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The following commands are provided to work with the service:

  • node-red-start - this starts the Node-RED service and displays its log output. Pressing Ctrl-C or closing the window does not stop the service; it keeps running in the background
  • node-red-stop - this stops the Node-RED service
  • node-red-restart - this stops and restarts the Node-RED service
  • node-red-log - this displays the log output of the service

You can also start the Node-RED service on the Raspberry Pi OS Desktop by selectingthe Menu -> Programming -> Node-RED menu option.

Autostart on boot

If you want Node-RED to run when the Pi is turned on, or re-booted, you can enable the serviceto autostart by running the command:

To disable the service, run the command:

Opening the editor

Once Node-RED is running you can access the editor in a browser.

If you are using the browser on the Pi desktop, you can open the address: http://localhost:1880.

We recommend using a browser outside of the PI and pointing it at Node-RED running on the Pi. However you can use the built in browser and if so we recommend Chromium or Firefox-ESR and not Epiphany

.

When browsing from another machine you should use the hostname or IP-address of the Pi: http://<hostname>:1880. Youcan find the IP address by running hostname -I on the Pi.

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Next steps