Fix ZeroDivisionError if plug is powered off

1 changed files with 4 additions and 1 deletions
--- a/sem6000.py
+++ b/sem6000.py
@ -208,7 +208,10 @@ class SEMSocket():
                self.__btle_device.total_power = total_power

                # calculated values
-                self.__btle_device.power_factor = power / (voltage * current)
+                try:
+                    self.__btle_device.power_factor = power / (voltage * current)
+                except ZeroDivisionError:
+                    self.__btle_device.power_factor = None
            elif message_type == 0x17:
                if data[5] == 0x00 or data[5] == 0x01:
                    if data[4]: