# 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. **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
   ```

2. **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 Dash Deploy](https://dash.deno.com/account/overview)
      - **Note**: Deno Dash is the legacy version of Deno Deploy. Elato is currently using Deno Dash. You can use Deno Deploy if you prefer but Deno deploy routes websockets via AWS which flips your websocket's RSV bits and can result in unknown opcodes for your ESP32.
   - 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)