Revision 14038: 33_readingsGroup.pm: check for empty hash in IODev. see forum: ...
33_readingsGroup.pm: check for empty hash in IODev. see forum: ​https://forum.fhem.de/index.php/topic,14425.msg623033.html#msg623033
Source: Revision 14038: 33_readingsGroup.pm: check for empty hash in IODev. see forum: ... (http://svn.fhem.de/trac/changeset/14038/trunk)