SignalR Skill

Real-time communication in VanDaemon uses SignalR for WebSocket-based updates between the .NET API and Blazor WASM frontend. The hub at /hubs/telemetry broadcasts tank levels, control states, and alerts to subscribed client groups. Background services poll hardware every 5 seconds and push changes via IHubContext.

Quick Start

Server Hub Definition

// src/Backend/VanDaemon.Api/Hubs/TelemetryHub.cs
public class TelemetryHub : Hub
{
    public async Task SubscribeToTanks()
    {
        await Groups.AddToGroupAsync(Context.ConnectionId, "tanks");
    }