Revision 29291: 36_Shelly: illegal division when attr Periods is not set (ShellyPro3EM)
36_Shelly: illegal division when attr Periods is not set (ShellyPro3EM)
Source: Revision 29291: 36_Shelly: illegal division when attr Periods is not set (ShellyPro3EM) (http://svn.fhem.de/trac/changeset/29291/trunk)