I’m developing a Node.js application to control a Samsung Smart TV using WebSocket API. My goal is to send remote control commands (like volume up) to the TV, but I’m encountering an issue where the TV responds with an “invalid method field from message” error whenever I attempt to send a command.

Setup:

1. I’ve established a WebSocket connection from my Node.js server to the Samsung Smart TV WebSocket endpoint (ws://192.168.18.173:8001).
2. When a command is triggered (e.g., volume up), my Node.js server constructs a JSON command (method: ‘ms.remote.control’) and sends it to the TV.
3. Example command sent to the TV:

{
  "event": "ms.channel.emit",
  "data": {
    "to": "host",
    "event": "ms.remote.control",
    "data": {
      "method": "ms.remote.control",
      "params": {
        "Cmd": "Click",
        "DataOfCmd": "KEY_VOLUP",
        "Option": "false",
        "TypeOfRemote": "SendRemoteKey"
      }
    }
  }
}

Issue:

Upon sending the command, the TV responds with an “invalid method field from message” error.

{
  "data": {
    "message": "invalid method field from message"
  },
  "event": "ms.error"
}