CUB-208: Add README with project overview and setup instructions #4

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# RemoteRig Central Hub
A central hub for managing remote camera rigs, designed for Raspberry Pi Zero 2 W.
## Overview
RemoteRig Central Hub is the control plane for remote camera setups. It connects to camera rigs over MQTT, stores configuration and state in SQLite, and exposes a management API — all from a lightweight Go binary optimized for resource-constrained devices like the Raspberry Pi Zero 2 W.
## Tech Stack
| Component | Technology |
| -------------- | ----------------------------- |
| Language | Go 1.24+ |
| Database | SQLite |
| Messaging | MQTT |
| Configuration | YAML (`gopkg.in/yaml.v3`) |
| Target Platform| Raspberry Pi Zero 2 W (ARMv6) |
## Project Structure
```
remote-rig/
├── cmd/
│ └── server/
│ └── main.go # Application entry point
├── internal/
│ └── db/
│ └── db.go # SQLite database initialization and schema
├── config.yaml # Application configuration
├── go.mod # Go module definition
├── go.sum # Dependency checksums
└── README.md
```
## Prerequisites
- **Go 1.24+** — [Download and install](https://go.dev/dl/)
- **MQTT Broker** — e.g., [Mosquitto](https://mosquitto.org/) (default: `localhost:1883`)
- **Raspberry Pi Zero 2 W** (or any Linux system — macOS and Windows also work for development)
- **Git** — for cloning the repository
## Setup
### 1. Clone the Repository
```bash
git clone https://code.cubecraftcreations.com/CubeCraft-Creations/remote-rig.git
cd remote-rig
```
### 2. Install Go Dependencies
```bash
go mod download
```
### 3. Configure
Edit `config.yaml` to match your environment:
```yaml
# Database file path (SQLite)
db_path: "remoterig.db"
# API key for endpoint authentication — CHANGE THIS
api_key: "your-secure-api-key-here"
# HTTP server settings
port: 8080
read_timeout: 5s
write_timeout: 10s
idle_timeout: 120s
# MQTT broker connection
mqtt:
broker: "localhost:1883"
client_id: "remoterig-hub"
# Target platform
platform:
type: "pi-zero-2w"
max_cameras: 16
```
Key settings to review:
| Setting | Description | Default |
| ------- | ----------- | ------- |
| `api_key` | API key for authenticating requests | `changeme` (**must change**) |
| `port` | HTTP server listen port | `8080` |
| `mqtt.broker` | MQTT broker address | `localhost:1883` |
| `mqtt.client_id` | MQTT client identifier | `remoterig-hub` |
| `platform.type` | Target platform identifier | `pi-zero-2w` |
| `platform.max_cameras` | Maximum number of camera rigs | `16` |
| `db_path` | SQLite database file path | `remoterig.db` |
| `read_timeout` | HTTP read timeout | `5s` |
| `write_timeout` | HTTP write timeout | `10s` |
| `idle_timeout` | HTTP idle connection timeout | `120s` |
## Running Locally
Start the hub with:
```bash
go run ./cmd/server/
```
You should see output similar to:
```
RemoteRig hub starting...
Database: remoterig.db
API key set: true
Server port: 8080
MQTT broker: localhost:1883
Platform: pi-zero-2w (max 16 cameras)
RemoteRig hub ready
```
## Building for Raspberry Pi Zero 2 W
Cross-compile from your development machine:
```bash
GOOS=linux GOARCH=arm GOARM=6 go build -o remoterig-hub ./cmd/server/
```
Copy the binary and `config.yaml` to your Pi:
```bash
scp remoterig-hub config.yaml pi@raspberrypi:/home/pi/remoterig/
```
Then run on the Pi:
```bash
./remoterig-hub
```
### Build Matrix
| Target | Command |
| ------ | ------- |
| Raspberry Pi Zero 2 W | `GOOS=linux GOARCH=arm GOARM=6 go build -o remoterig-hub ./cmd/server/` |
| Local (same arch) | `go build -o remoterig-hub ./cmd/server/` |
| Linux amd64 | `GOOS=linux GOARCH=amd64 go build -o remoterig-hub ./cmd/server/` |
## Running Tests
```bash
go test ./...
```
## License
Proprietary — CubeCraft Creations.