outlaw-dma / node-red-contrib-netvar-utils

Network Variable List utility nodes for node-red

node-red-contrib-netvar-utils

This module provides set of utility nodes in Node-RED for creating, parsing NVL (Network Variable List) UDP packets.

Nodes

• nvl-json: Outputs JSON object with falsy values based on the configured NVL.
• nvl-reader: Parses received NVL packets and returns the entire NVL as JSON object. Will only send output when it receives the last expected packet. Outputed JSON object has the same structure as the one created via nvl-json.
• nvl-emitter: Outputs NVL packet(s) using given JSON object. Input JSON object must have the same structure as the ones outputed via nvl-json and nvl-reader.

Created using @alexk111's node-red template

Example

JSON Structure

VAR_GLOBAL
  flag: BOOL;
  counter: WORD;
  message: STRING(50);
  wordArray: ARRAY [1..5] OF WORD;
  timeMatrix: ARRAY [1..2] OF ARRAY [1..3] OF WORD;
  threeD: ARRAY [0..1, 0..1, 0..1] OF WORD;
END_VAR 

will be converted to:

{
  "flag": false,
  "counter": 0,
  "message": "",
  "wordArray": [0,0,0,0,0],
  "timeMatrix": [
    [0,0,0],
    [0,0,0]
  ],
  "threeD": [
    [[0,0], [0,0]],
    [[0,0], [0,0]]
  ]
}

Supported Data Types

https://github.com/Maiquu/node-red-contrib-netvar-utils/blob/e7a1abb9e9e802938581f19a3a0f66b8598b7195/src/nodes/shared/types.d.ts#L58

TODO

• BigInt
• More detailed documentation for nodes
• Options to define how input is received and how output is delivered
• STRUCT
• Tests

License

MIT