{
  "title": "Ultimo-Zählerstände eintragen",
  "fields": [
    {
      "name": "meter_number",
      "widget": "text_field",
      "label": "Zählernummer",
      "hint_text": "z.B. 21162908_40008",
      "validators": [
        {
          "type": "required",
          "error_text": "Zählernummer ist erforderlich"
        }
      ],
      "prefix_icon": "speed"
    },
    {
      "name": "variable_name",
      "widget": "text_field",
      "label": "Variable Name (optional)",
      "hint_text": "Standard: ENERGY_INST_VAL",
      "initial_value": "ENERGY_INST_VAL",
      "prefix_icon": "analytics"
    },
    {
      "name": "readings",
      "widget": "text_field",
      "label": "Ultimo-Stände",
      "hint_text": "Format: YYYY-MM:Wert, z.B. 2024-01:12345.5, 2024-02:23456.7 (eine Zeile pro Monat)",
      "text_field_config": {
        "max_lines": 10,
        "keyboard_type": "multiline"
      },
      "validators": [
        {
          "type": "required",
          "error_text": "Mindestens ein Ultimo-Stand ist erforderlich"
        }
      ],
      "helper_text": "Jede Zeile ein Monatstand im Format YYYY-MM:Zählerstand",
      "prefix_icon": "list"
    }
  ]
}