diff --git a/VGT_Sub/module.php b/VGT_Sub/module.php
index ac40a48..bf5cd08 100644
--- a/VGT_Sub/module.php
+++ b/VGT_Sub/module.php
@@ -48,8 +48,6 @@ class VGT_Sub extends IPSModule
          *  FEEDBACK REQUEST Variablen (read-only)
          * ------------------------------------------*/
         $this->RegisterVariableString('FeedbackRequestPayload', 'Feedback Request Payload', '', 40);
-
-        // WICHTIG: Kein ConnectParent mehr hier -> Modul ist nur Client/Device
     }
 
 
@@ -57,9 +55,6 @@ class VGT_Sub extends IPSModule
     {
         parent::ApplyChanges();
 
-        // Kein ConnectParent mehr -> Parent wird in der Konsole verknüpft
-        // (MQTT Server ODER MQTT Client Gateway)
-
         $device = $this->ReadPropertyString('DeviceID');
         if ($device === '') {
             return;
@@ -80,10 +75,6 @@ class VGT_Sub extends IPSModule
     {
         $this->SetValue($Ident, $Value);
 
-        // Optional: Hier könntest du auch direkt publizieren,
-        // wenn eine Variable geändert wird.
-        // Beispiel (auskommentiert, nur als Vorlage):
-        
         $device = $this->ReadPropertyString('DeviceID');
         if ($device !== '') {
             switch ($Ident) {
@@ -105,7 +96,6 @@ class VGT_Sub extends IPSModule
                     break;
             }
         }
-        
     }
 
 
@@ -114,6 +104,11 @@ class VGT_Sub extends IPSModule
      * ------------------------------------------*/
     private function Subscribe(string $topic): void
     {
+        if (!$this->HasActiveParent()) {
+            $this->SendDebug('MQTT', 'Subscribe ohne aktiven Parent: ' . $topic, 0);
+            return;
+        }
+
         $packet = [
             'PacketType'       => 8,   // SUBSCRIBE
             'QualityOfService' => 0,
@@ -133,6 +128,11 @@ class VGT_Sub extends IPSModule
      * ------------------------------------------*/
     private function Publish(string $topic, string $payload): void
     {
+        if (!$this->HasActiveParent()) {
+            $this->SendDebug('MQTT', 'Publish ohne aktiven Parent: ' . $topic, 0);
+            return;
+        }
+
         $packet = [
             'PacketType'       => 3,   // PUBLISH
             'QualityOfService' => 0,
@@ -160,6 +160,8 @@ class VGT_Sub extends IPSModule
         $topic   = $data['Topic']   ?? '';
         $payload = $data['Payload'] ?? '';
 
+        $this->SendDebug('MQTT', 'Receive: Topic=' . $topic . ' Payload=' . $payload, 0);
+
         $device = $this->ReadPropertyString('DeviceID');
         if ($device === '') {
             return;
@@ -167,21 +169,16 @@ class VGT_Sub extends IPSModule
 
         /** -------------------------------------------
          * 1️⃣ FEEDBACK REQUEST
-         *     request:  feedback-request/deviceId
-         *     response: feedback-response/deviceId
          * ------------------------------------------*/
         if ($topic === "feedback-request/$device") {
 
-            // 1. Payload speichern
             $this->SetValue('FeedbackRequestPayload', $payload);
 
-            // 2. JSON interpretieren (falls vorhanden)
             $json = json_decode($payload, true);
             if (!is_array($json)) {
                 $json = [];
             }
 
-            // 3. Antwort-Mix erstellen (Payload + Status)
             $response = array_merge($json, [
                 "power_production" => $this->GetValue('PowerProduction'),
                 "is_ready"         => $this->GetValue('IsReady'),
@@ -191,20 +188,15 @@ class VGT_Sub extends IPSModule
                 "max_soc"          => $this->GetValue('MaxSOC')
             ]);
 
-            // 4. Antwort senden
             $this->Publish("feedback-response/$device", json_encode($response));
             return;
         }
 
-
         /** -------------------------------------------
          * 2️⃣ REMOTE CONTROL REQUEST
-         *     request:  remote-control-request/deviceId
-         *     response: remote-control-response/deviceId
          * ------------------------------------------*/
         if ($topic === "remote-control-request/$device") {
 
-            // 1. Payload speichern
             $this->SetValue('RemoteControlPayload', $payload);
 
             $json = json_decode($payload, true);
@@ -219,7 +211,6 @@ class VGT_Sub extends IPSModule
                 }
             }
 
-            // 2. Echo Response
             $this->Publish("remote-control-response/$device", $payload);
             return;
         }