# Mobile WebSocket Channel

## Overview

Real-time packet streaming for iOS/Android mobile applications.

**Socket:** `MobileUserSocket` (`/mobile`, WebSocket only)
**Channel:** `MobileChannel`

## Connection

Mobile clients connect via WebSocket to `/mobile`:
```
ws://host/mobile/websocket?vsn=2.0.0
```

## Protocol

See [mobile-api.md](../mobile-api.md) for the complete message format and protocol specification.

## Architecture

The mobile channel receives real-time packet broadcasts from the same PubSub sources as the web LiveView clients:
- `StreamingPacketsPubSub` — bounds-filtered
- `SpatialPubSub` — viewport-filtered
- Per-callsign Phoenix PubSub topics

Packets are formatted into a mobile-optimized JSON structure and pushed to connected clients.