diff --git a/examples/mqtt.py b/examples/mqtt.py
index aaa130a..0e60af8 100644
--- a/examples/mqtt.py
+++ b/examples/mqtt.py
@@ -125,11 +125,11 @@ try:
 
         print("-----")
         logging.info("test")
-        logging.info("PvP: "+value_pvProduction)
-        logging.info("Hou: "+value_wHouseConsumption)
-        logging.info("I/E: "+value_energyImportExport)
-        logging.info("SoC: "+value_houseBatterySoC)
-        logging.info("Bio: "+value_houseBatteryLoadUnload)
+        logging.info("PvP: "+str(value_pvProduction))
+        logging.info("Hou: "+str(value_wHouseConsumption))
+        logging.info("I/E: "+str(value_energyImportExport))
+        logging.info("SoC: "+str(value_houseBatterySoC))
+        logging.info("Bio: "+str(value_houseBatteryLoadUnload))
         #drawblack.rectangle((150, 0, 220, 50), fill = 255)
         drawblack.text((150, 0), value_pvProduction, font = font10, fill = 0)
         #drawblack.rectangle((150, 15, 220, 50), fill = 255)