JSON_SirenCtrl

SirenCtrl message in JSON format

{
  "SirenCtrl":{
    "switch":"", 
/*required, string type, switch: "open", "close"*/
    "List":[{
/*this node is only required when controlling multiple sirens*/
      "id": 
/*integer type, siren No., it starts from 1, 0xffffffff-control all sirens*/
    }]
  }
}