preset fix

src/AItem.ts

@@ -41,6 +41,10 @@ export abstract class AItem {
 
     abstract processMessage(topic: string, payload: string) : void
 
+    startFunc() : void {
+
+    }
+
     exportItem() : ExportType|null {
         return null
     }
@@ -49,6 +53,6 @@ export abstract class AItem {
         mqttHandler.register(this.subscribeTopics, (topic: string, payload: string) : void => {
             // logger.info(`item ${this.itemId}: ${topic}, ${payload}`)
             this.processMessage(topic, payload)
-        })
+        }, () => { this.startFunc() })
     }
 }