NMEA Output

Node ID: nmeaOutput · Role: Sink · Realtime config: no

Description

Exports fused GNSS data as NMEA 0183 sentences (GGA, RMC, etc.) over a serial port or TCP socket. Lets FusionHub act as a virtual GPS for applications that expect standard NMEA input.

Inputs / Outputs

Inputs: Gnss
Outputs: (none)

Config aliases

NmeaSink, nmeaSink, nmeaOutput

Properties

The following fields are exposed in the node’s Properties panel in the UI. Types map to UI widgets (e.g. string → text input, number → numeric, boolean → toggle, select → dropdown, json → JSON editor).

Key	Label	Type	Default	Description / Notes
`transport`	Transport	`string`	`serial`	Output transport: ‘serial’ (write NMEA to a serial port) or ‘udp’ (broadcast over the network).
`port`	Serial Port	`string`	`COM1`	Serial port path (serial transport only).
`baudRate`	Baud Rate	`number`	`115200`	Serial baud rate (serial transport only).
`host`	Host	`string`	`127.0.0.1`	Destination host for UDP transport.
`nmeaPort`	Network Port	`number`	`9000`	Destination UDP port for UDP transport.

Example node definition

A full node definition in config.json looks like the block below. Paste it under the sinks key of your config, keyed by the node’s instance name (any identifier; it doesn’t have to match the node ID).

{
  "sinks": {
    "nmeaOutput": {
      "inputEndpoints": [
        "inproc://gnss_data"
      ],
      "inputDataFilter": [
        "Gnss"
      ],
      "settings": {
        "baudRate": 115200,
        "host": "127.0.0.1",
        "nmeaPort": 9000,
        "port": "COM1",
        "transport": "serial"
      }
    }
  }
}

Field reference

Field	Purpose
`inputEndpoints`	List of upstream endpoints this node connects to (`outEndpoint` / `dataEndpoint` values from upstream nodes).
`inputDataFilter`	Optional whitelist of data types. Messages whose type isn’t in the list are dropped at the subscriber.
`settings`	All user-configurable fields — see the Properties table above.

Connections can also be declared at the top-level connections array when settings.explicitConnections is true, as an alternative to filling inputEndpoints on each node.

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