message to mqtt

{
  "nodes": [
    {
      "id": "mqtt_receive",
      "type": "mqttmessage",
      "name": "Ricevi da MQTT",
      "properties": {
        "topic": "awtrix_52cae4/custom"
      },
      "x": 100,
      "y": 100
    },
    {
      "id": "display_text",
      "type": "textmessage",
      "name": "Mostra testo",
      "properties": {
        "text": "{{payload.text}}",
        "duration": 5
      },
      "x": 300,
      "y": 100
    }
  ],
  "connections": [
    {
      "from": "mqtt_receive",
      "to": "display_text"
    }
  ]
}