node-red-contrib-sitx/examples/BrowserListen.md

Node-RED Nodes for sending & receiving Cursor on Target TAK Data with PAR Sit(x).

## Listen to a Group in a Web Browser

The following flow plays PTT audio messages in the browser.

![Playing PTTs in Browser](https://github.com/orion-labs/node-red-contrib-orion/raw/master/docs/example-browser_play.png)

1. **Orion RX**: Connects to Orion and receives PTT events.
2. **Orion Decode**: Converts Orion Audio Format to WAV and stores at URL `media_wav`.
3. **Change**: Sets `msg.url` to `msg.media_wav`.
4. **HTTP Request**: Downloads `msg.url` and returns a binary buffer in `msg.payload`.
5. **Play Audio**: Plays the audio in the binary buffer in `msg.payload`.

```json
[
  {
    "id": "7fee8343.1b74dc",
    "type": "orion_rx",
    "z": "43dbbc8.6699844",
    "name": "Group RX",
    "orion_config": "",
    "x": 80,
    "y": 560,
    "wires": [["906e5a3c.573af8"]]
  },
  {
    "id": "906e5a3c.573af8",
    "type": "orion_decode",
    "z": "43dbbc8.6699844",
    "name": "",
    "x": 260,
    "y": 560,
    "wires": [["790dbd12.238254"]]
  },
  {
    "id": "79a5c028.08cf7",
    "type": "play audio",
    "z": "43dbbc8.6699844",
    "name": "",
    "voice": "",
    "x": 810,
    "y": 560,
    "wires": []
  },
  {
    "id": "6db772e2.dc9cec",
    "type": "http request",
    "z": "43dbbc8.6699844",
    "name": "GET Media",
    "method": "GET",
    "ret": "bin",
    "url": "",
    "tls": "",
    "x": 630,
    "y": 560,
    "wires": [["79a5c028.08cf7"]]
  },
  {
    "id": "790dbd12.238254",
    "type": "change",
    "z": "43dbbc8.6699844",
    "name": "",
    "rules": [{ "t": "set", "p": "url", "pt": "msg", "to": "media_wav", "tot": "msg" }],
    "action": "",
    "property": "",
    "from": "",
    "to": "",
    "reg": false,
    "x": 450,
    "y": 560,
    "wires": [["6db772e2.dc9cec"]]
  }
]
```