# Elato AI WebSocket Server (Deno)

This directory contains the WebSocket server implementation for Elato AI, built with Deno.

## Prerequisites

- [Deno](https://deno.land/) installed on your system
- Network access (for both local development and deployment)

## Running the Server

### Local Development

1. **Find your local IP address**:
   - View your Wifi IP when you click on Wifi Settings > Your Wifi Network > Details, OR 
   - On macOS/Linux: Open Terminal and run `ifconfig`
   - On Windows: Open Command Prompt and run `ipconfig`
   - Look for your active network interface (WiFi: `en0` on Mac, `wlan0` on Linux, `Wireless LAN adapter Wi-Fi` on Windows)
   - Note the IP address (e.g., `192.168.1.100`)

2. **Update firmware configuration**:
   - In the firmware project, set `DEV_MODE` in Config.cpp
   - Update the WebSocket server IP to your local IP address

3. **Start the server**:
   ```bash
   # Navigate to the server-deno directory
   cd server-deno
   
   # Run the server (replace server.ts with your main file if different)
   deno run -A --env-file=.env main.ts
   ```

4. **Verify the server**:
   - The server should be running on port 8000 (default)
   - You should see a message confirming the server is listening

### Production Deployment

1. **Deploy to Deno Deploy**:
   - Create an account on [Deno Deploy](https://deno.com/deploy)
   - Create a new project
   - Connect your GitHub repository or upload your server code
   - Deploy to a custom domain (e.g., `your-app.deno.dev`)

2. **Update firmware configuration**:
   - In the firmware project, make sure `DEV_MODE` is NOT defined in Config.cpp
   - The WebSocket server will be set to your Deno Deploy URL

3. **Get the Root CA Certificate using terminal**:
   - To get the full certificate chain with the root CA:
   ```bash
   openssl s_client -showcerts -connect your-app.deno.dev:443 </dev/null
   ```
   - Copy the last certificate in the chain (the root CA certificate) including the BEGIN and END lines
   - Paste this into the `CA_cert` variable in Config.cpp

## Troubleshooting

### Connection Issues
- Ensure your ESP32 device and development computer are on the same network
- Check if any firewalls are blocking port 8000
- Verify your local IP address hasn't changed (dynamic IPs can change after reconnecting)

### Server Errors
- Check the server logs for error messages
- Ensure Deno has proper permissions to access network resources

## Additional Resources

- [Deno Documentation](https://docs.deno.com/runtime/)
- [Deno Deploy Documentation](https://docs.deno.com/deploy/manual/)
- [WebSocket API Reference](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)