{
  "version": 1,
  "grid_cols": 8,
  "grid_rows": 8,
  "_doc": "MQTT-driven text overlays. Каждый блок = одна MQTT-подписка + persistent text overlay в фиксированной позиции на output frame'е. Не привязан к layout cells. anchor: right-bottom/right-top/left-bottom/left-top/center. format: printf-style для extracted значения (для double — \"%+.1f°C\"). json_field пустой → raw payload как string.",

  "overlays": [
    {
      "id": "temp_outside",
      "topic": "zigbee2mqtt/Температура на улице",
      "json_field": "temperature",
      "format": "%+.1f°C",
      "anchor": "right-bottom",
      "margin_x": 32,
      "margin_y": 24,
      "pixel_size": 32,
      "color": [255, 255, 255],
      "alpha": 230,
      "font_path": "/fonts/DejaVuSans-Bold.ttf"
    }
  ]
}