SimConnect Config Tool Explained: Quick Start for Developers

SimConnect Config Tool — Quick Start for Developers

What it is

SimConnect Config Tool is a utility that helps developers configure and troubleshoot SimConnect, the Microsoft Flight Simulator API used for communication between the simulator and add-ons (apps, gauges, external tools).

Key features

• Connection setup: Configure host/IP and port, and select TCP/UDP transport.
• Instance selection: Target the correct simulator instance when multiple are running.
• Logging: Enable/inspect connection and message logs to diagnose failures.
• Permissions: Manage firewall and access settings required for SimConnect connections.
• Message inspection: View sent/received SimConnect events, requests, and data definitions.

Quick setup steps

1. Install and run the tool (assume default install path).
2. Select transport protocol (TCP recommended for reliability).
3. Set host/IP to the simulator machine (use 127.0.0.1 for local).
4. Set the port (default SimConnect ports or match your add-on).
5. Choose the simulator instance if listed.
6. Enable logging and start the connection.
7. If connection fails, check Windows firewall rules and allow the chosen port/program.

Common developer workflows

• Validate connection from your add-on by watching the tool’s connection log.
• Inspect incoming/outgoing event IDs and data structures to confirm definitions match.
• Replay or simulate events to test handlers without the full sim running (if the tool supports it).
• Use message timestamps and payloads to measure latency and frequency.

Troubleshooting checklist

• No connection: Verify simulator is running, correct port/IP, and transport selected.
• Firewall blocked: Add inbound/outbound rules for the tool and SimConnect ports.
• Wrong instance: Try each listed instance or restart simulator and tool.
• Mismatched data definitions: Ensure your add-on and tool use identical data definition IDs and types.
• Permission errors: Run the tool with elevated privileges if needed.

Tips for developers

• Keep a concise mapping table of your event IDs and data definitions for quick verification.
• Use TCP for development; consider UDP only for high-frequency telemetry with tolerance for loss.
• Automate connection tests in CI where possible by scripting against the tool or a headless SimConnect mock.

If you want, I can provide a sample mapping table of event IDs/data definitions or a short example C# client that connects using SimConnect.