Node-RED is a powerful flow-based development tool for visual programming, ideal for IoT and automation projects. This guide walks you through installing Node-RED on a Raspberry Pi running Raspberry Pi OS.

• 🖥️ Raspberry Pi (Pi 3 or later recommended)
• 🐧 Raspberry Pi OS (Bullseye or newer)
• 🌐 Internet connection
• 🔧 Terminal access (SSH or direct login)

Keep your system up to date before installing:

sudo apt update && sudo apt upgrade -y

Use the Node-RED team's optimized installer:

bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)

This script will:

• Install the latest Node.js LTS
• Install Node-RED globally
• Configure Node-RED as a systemd service

To manage the Node-RED service:

sudo usermod -aG node-red pi

Replace `pi` with your actual username if different.

sudo systemctl enable nodered.service
sudo systemctl start nodered.service

Open your browser and go to:

http://<your-pi-ip>:1880

You should see the Node-RED flow editor.

The installer enables autostart by default. To verify:

systemctl enable nodered.service

• Check service status: `sudo systemctl status nodered.service`
• View logs: `journalctl -u nodered -f`
• Reinstall Node-RED: rerun the install script

• 🌐 Official Node-RED Raspberry Pi Guide
• 🔄 Node-RED Flow Library
• 💬 Node-RED Community Forum