diff --git a/examples/mqtt.py b/examples/mqtt.py
index 433a44a..66fb1e9 100644
--- a/examples/mqtt.py
+++ b/examples/mqtt.py
@@ -31,17 +31,17 @@ username = "mqtt-user"
 pw = "phio6yiR9ohs1veeghu4WaeGhaiRi8he4EiWasheev4faeku8tohdiuthah7zahP"
 client_id = "solarmonitor"
 
-global value_pvProduction
-global value_wHouseConsumption
-global value_energyImportExport
-global value_houseBatterySoC
-global value_houseBatteryLoadUnload
+# global value_pvProduction
+# global value_wHouseConsumption
+# global value_energyImportExport
+# global value_houseBatterySoC
+# global value_houseBatteryLoadUnload
 
-value_pvProduction = "0"
-value_wHouseConsumption = "0"
-value_energyImportExport = "0"
-value_houseBatterySoC = "0"
-value_houseBatteryLoadUnload = "0"
+# value_pvProduction = "0"
+# value_wHouseConsumption = "0"
+# value_energyImportExport = "0"
+# value_houseBatterySoC = "0"
+# value_houseBatteryLoadUnload = "0"
 
 try:
     logging.info("epd2in13bc Demo")
@@ -94,6 +94,12 @@ def on_connect(client, userdata, flags, rc):
         print("Failed to connect, return code %d\n", rc)
 
 def on_message(client, userdata, msg):
+    global value_pvProduction
+    global value_wHouseConsumption
+    global value_energyImportExport
+    global value_houseBatterySoC
+    global value_houseBatteryLoadUnload
+    
     if msg.topic == "openWB/pv/W":
         value_pvProduction = ""+msg.payload.decode()
         line = 0
@@ -104,10 +110,10 @@ def on_message(client, userdata, msg):
         value_energyImportExport = ""+msg.payload.decode()
         line = 30
     elif msg.topic == "openWB/housebattery/%Soc":
-        topic_houseBatterySoC = ""+msg.payload.decode()
+        value_houseBatterySoC = ""+msg.payload.decode()
         line = 45
     elif msg.topic == "openWB/housebattery/W":  
-        topic_houseBatteryLoadUnload = ""+msg.payload.decode()  
+        value_houseBatteryLoadUnload = ""+msg.payload.decode()  
         line = 60
 
     print(line)