LabVIEW

Autumn Labs does not require a native LabVIEW SDK. A LabVIEW application can send data to the Autumn Labs client by opening a local TCP connection and writing newline-delimited JSON.

Requirements

• Autumn Labs client installed on the station PC.
• Station registered with al register.
• Autumn Labs services running with al start.
• LabVIEW TCP functions available in your LabVIEW environment.

Endpoint

Open a TCP connection to the local Autumn Labs client:

Host: 127.0.0.1
Port: 5700

Station ID

The payload needs the registered station ID in the payload sid field. Run:

al info --verbose

The station ID is printed as:

stationID=<value>

Use that value in the LabVIEW VI as a string control, constant, or configuration value.

LabVIEW TCP shape

NI documents the LabVIEW TCP functions as the built-in way to open a TCP client connection and write string data to it. Use TCP Open Connection with address 127.0.0.1 and port 5700, then use TCP Write to send one JSON message followed by a newline character.

Build the VI in this order:

1. Create the metric payload with sid, timestamp, unit serial number, metric name, metric value, limits, tags, and result fields.
2. Serialize the metric payload to a JSON string.
3. Create the TCP envelope with source_type, file, station_id, and message.
4. Serialize the envelope to JSON.
5. Append a newline character (\n) to the serialized envelope.
6. Use TCP Open Connection to connect to 127.0.0.1 on port 5700.
7. Use TCP Write to send the serialized envelope plus newline.
8. Close the TCP connection.

Configure the TCP write

For Autumn Labs, use the LabVIEW TCP functions like this:

Do not use the HTTP Client VIs for local ingestion. The local Autumn Labs client listens on a TCP socket, not an HTTP endpoint.

Metric example

The line written by LabVIEW should match this shape. The important details are that message is a JSON-encoded string, not a nested object, and that the serialized envelope is followed by \n.

{
  "source_type": "sdk",
  "file": "metrics",
  "station_id": "stn_abc123",
  "message": "{\"sid\":\"stn_abc123\",\"slt\":\"\",\"ser\":\"UNIT-123\",\"utc\":1778702400000000,\"mod\":\"production\",\"tag\":[\"labview\"],\"nam\":\"temperature\",\"met\":{\"value\":25.5,\"unit\":\"C\",\"type\":\"float\"},\"lim\":{\"upper\":30,\"lower\":20},\"rea\":\"\",\"res\":\"pass\"}"
}

Metric payload fields:

NI references

• TCP Open Connection Function - NI
• TCP Write Function - NI
• Creating a TCP Client - NI