ADD MELODY:

{
  "cmd": "add_melody",
  "contents": {
    "url": "URL",
    "filename": "NAME.EXT"
  }
}


SET RELAY TIMERS:

{
  "cmd": "set_relay_timers",
  "contents": {"b1":100, "b2":200}
}


START PLAYBACK:

{
  "cmd": "playback",
  "contents": {
    "action": "play"
  }
}


STOP PLAYBACK:

{
  "cmd": "playback",
  "contents": {
    "action": "stop"
  }
}


SET MELODY:

{
  "cmd": "set_melody",
  "contents": {
    "name": "esperinos",
    "id": "10",
    "duration": 5000,
    "infinite": true,
    "interval": 1000,
    "speed": 200,
    "loop_dur": 2000
  }
}


LIST MELODIES

{
  "cmd": "list_melodies",
}