diff --git a/Symcon_Publish_to_Shelly_MQTT/module.php b/Symcon_Publish_to_Shelly_MQTT/module.php
index bafde07..96d6960 100644
--- a/Symcon_Publish_to_Shelly_MQTT/module.php
+++ b/Symcon_Publish_to_Shelly_MQTT/module.php
@@ -41,16 +41,16 @@ class Symcon_Publish_to_Shelly_MQTT extends IPSModule
     private function GetAction()
     {
         // Eigenschaften lesen
-        $broker = $this->ReadPropertyString("broker_address");
-        $port = $this->ReadPropertyInteger("broker_port");
-        $user = $this->ReadPropertyString("username");
-        $pass = $this->ReadPropertyString("password");
-        $topic = $this->ReadPropertyString("Topic");
+        $broker = GetValue($this->ReadPropertyString("broker_address"));
+        $port = GetValue($this->ReadPropertyInteger("broker_port"));
+        $user = GetValue($this->ReadPropertyString("username"));
+        $pass = GetValue($this->ReadPropertyString("password"));
+        $topic = GetValue($this->ReadPropertyString("Topic"));
 
-        $msg_id = $this->ReadPropertyInteger("msg_id");
-        $src = $this->ReadPropertyString("src");
-        $method = $this->ReadPropertyString("method");
-        $switch_bool = $this->ReadPropertyBoolean("switch_bool");
+        $msg_id = GetValue($this->ReadPropertyInteger("msg_id"));
+        $src = GetValue($this->ReadPropertyString("src"));
+        $method = GetValue($this->ReadPropertyString("method"));
+        $switch_bool = GetValue($this->ReadPropertyBoolean("switch_bool"));
         // JSON-Payload erstellen
         $payload = [
             "id" => 0,