Comm Links

Configure how QGroundControl connects to vehicles.

Auto-Connect

By default, QGC auto-detects and connects to common devices:

• Pixhawk — auto-connect Pixhawk flight controllers via USB
• SiK Radio — auto-connect SiK telemetry radios
• LibrePilot — auto-connect LibrePilot controllers
• UDP — auto-connect via UDP broadcast
• RTK GPS — auto-connect RTK GPS base stations

NMEA GPS

Configure an external NMEA GPS device to provide GCS position (used for RTK and Remote ID):

• Device — Disabled, UDP, or Serial port
• Baudrate — serial baud rate (with custom baud option)
• UDP port — port for UDP NMEA input (default: 14401)

Link Management

Manually create and manage communication links when auto-connect is insufficient:

• Add New Link — create a link with a name, type, and connection-specific settings:
  • Serial — port, baud rate, flow control
  • TCP — host address, port
  • UDP — local port, remote hosts
  • Bluetooth — device selection
• Auto Connect on Start — automatically connect this link when QGC starts
• High Latency — mark the link as high-latency (reduces message rate)

Existing links can be edited, deleted, connected, or disconnected from the link list.