Add RevPi docs to Node-RED hardware section

src/node-red/hardware/revolutionary-pi.md

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+---
+eleventyNavigation:
+  key: Revolutionary Pi
+  parent: Hardware
+meta:
+   title: Setting Node-RED on Revolutionary Pi
+   description: Learn how to set up Node-RED on a Raspberry Pi 4, including installation, configuration, and integration with sensors and actuators.
+   keywords: node-red, raspberry pi, Revolutionary Pi
+---
+
+# {{meta.title}}
+
+Revolution Pi is an industrial-grade computer based on the Raspberry Pi Compute Module, designed specifically for use in industrial automation environments. It offers robust hardware, a real-time operating system, and support for various industrial protocols, allowing it to be used as an IIoT gateway to collect and send data from factory machines to the cloud.
+
+## Goal
+
+This documentation guides users through installing the FlowFuse Device Agent on a Revolutionary Pi. The agent enables running Node-RED on the edge device, managing it remotely via FlowFuse, and accessing [enterprise features](/product/features/) that are useful for organizations. Since the device does not come with Node.js preinstalled, this guide covers installing both Node.js and the FlowFuse Device Agent.
+
+## Prerequisites
+
+Before proceeding with the installation, ensure you have the following:
+
+- **Revolutionary Pi** – A functioning device with internet access.
+- **Sudo Privileges** – Administrator access to install required packages.
+- **Network Access** – Ensure outbound traffic is allowed on port 443 for connections to:
+
+  - `app.flowfuse.com:443`
+  - `mqtt.flowfuse.cloud:443`
+
+- **Firewall Rules** – The Device Agent does not install Node-RED at startup. When receiving a snapshot, it downloads the required Node-RED version. Allow access to:
+
+  - `https://registry.npmjs.com`
+
+Verify that your network can access the necessary services. You can run the following `curl` commands to check connectivity:
+
+  ```bash
+  curl -I https://app.flowfuse.com
+  curl -I https://mqtt.flowfuse.cloud
+  curl -I https://registry.npmjs.com
+```
+
+The expected output should indicate that the servers are reachable. For example, a successful response would look like this:
+
+```bash
+HTTP/1.1 200 OK
+Date: Mon, 04 Mar 2025 12:00:00 GMT
+Server: nginx
+Content-Type: text/html; charset=UTF-8
+Connection: keep-alive
+```
+
+If the connection is unsuccessful, check for network restrictions or DNS issues. You should see a 200 OK status code if the services are accessible.
+
+## Getting Started
+
+This guide provides step-by-step instructions for setting up the FlowFuse Device Agent on a Revolutionary Pi. It begins with installing Node.js, a prerequisite for running the agent, followed by the installation and configuration of the FlowFuse Device Agent.
+
+### Installing Node.js
+
+Since Node.js is not preinstalled on the Revolutionary Pi, follow these steps to install it:
+
+#### Step 1: Update System Packages
+
+```bash
+sudo apt update && sudo apt upgrade -y
+```
+
+#### Step 2: Install Node.js
+
+You can install Node.js from the default APT repositories:
+
+```bash
+sudo apt install -y nodejs
+```
+
+#### Step 3: Verify Installation
+
+```bash
+node -v
+```
+
+After running the verification command, the installed Node.js version should be displayed in the terminal.
+
+> **Note:** Ensure that the installed version is **Node.js 18 or later**, as this is the recommended version for optimal compatibility with the device agent.
+
+### Installing the FlowFuse Device Agent
+
+#### Step 1: Install Required Package (curl)
+
+If `curl` is not already installed on your system, you will need to install it first:
+
+```bash
+sudo apt install -y curl
+```
+
+#### Step 2: Execute the Installation Script
+
+To install the FlowFuse Device Agent and set it up as a service, download and execute the installation script from GitHub:
+
+```bash
+curl -O https://raw.githubusercontent.com/FlowFuse/device-agent/main/service/raspbian-install-device-agent.sh
+```
+
+Make the script executable:
+
+```bash
+chmod +x raspbian-install-device-agent.sh
+```
+
+Finally, execute the script with `sudo` to install the FlowFuse Device Agent and configure it as a service:
+
+```bash
+sudo ./raspbian-install-device-agent.sh
+```
+
+This script will install the FlowFuse Device Agent, set it up as a service, and start it automatically.
+
+### Registering the Device Agent to FlowFuse and Running It
+
+After installing the FlowFuse Device Agent, the next step is to link the Revolutionary Pi to your [FlowFuse team](/docs/user/team/). This allows the device to be managed remotely and receive Node-RED deployments.
+
+#### Step 1: Add a New Device to Your FlowFuse Team
+
+Follow the instructions in the official documentation to add your device to your FlowFuse team: [Add a Remote Instance](/docs/device-agent/register/#add-remote-instance).
+
+Once you register the device, you will receive the configuration details required to connect it to your team. Copy the provided command.
+
+#### Step 2: Configuring the Device
+
+Execute the command you copied to complete the device configuration.
+
+#### Step 3: Restart the Device Agent
+
+Once the device is configured, restart the device. The FlowFuse Device Agent will start automatically every time you restart the device.
+
+#### Step 4: Verifying the Device Agent is Running
+
+After the device restarts, you can check if the FlowFuse Device Agent is running by using the following command:
+
+```bash
+sudo systemctl status flowfuse-agent
+```
+
+This should display the status of the FlowFuse Device Agent, showing whether it's active and running.
+
+> **Note:** If you encounter any issues with the agent not starting automatically, you can manually start it with the following command:
+
+```bash
+sudo systemctl start flowfuse-agent
+```
+
+#### Step 5: Monitor and Manage Device from FlowFuse
+
+Once the device is successfully registered and running, you can monitor and manage it from the FlowFuse platform. Any changes you make to the device’s configuration or Node-RED flows will be reflected on the device immediately.
+
+To access the device editor, go to your FlowFuse team, where you will see the Revolutionary Pi listed under remote instances. Click on it to enable the device editor, then open the editor. For more information, refer to [Deploy Flows to Remote Instances](https://flowfuse.com/docs/device-agent/quickstart/#deploy-flows-to-remote-instances).