some changes

src/M433SwitchItem.ts

@@ -1,6 +1,6 @@
 import * as logger from './log'
 import { mqttHandler } from './MqttDispatcher'
-import { AItem, HasStateAndFeedbackTopic } from './AItem'
+import { AItem, HasStateAndFeedbackTopic, HasInTopic } from './AItem'
 import { SwitchExport, ExportType } from './Export'
 
 
@@ -18,6 +18,10 @@ export class M433SwitchItem extends AItem implements HasStateAndFeedbackTopic {
         return this.stateTopic
     }
 
+    getInTopic() : string {
+        return this.stateTopic
+    }
+
     getStateFeedbackTopic() : string {
         return this.stateFeedbackTopic
     }