Revision 13071: 98_Weekdaytimer, 98_Heating_Control: it is now possible to specify ...
98_Weekdaytimer, 98_Heating_Control: it is now possible to specify params with blanks by using a ":". when a ":" must be conserve you can mask it by using a backslash. to send to a HUE "21:23|pct 40 : transitiontime 18000" you can achieve ist by defining a param like "21:23|pct:40:\::transitiontime:18000"
Source: Revision 13071: 98_Weekdaytimer, 98_Heating_Control: it is now possible to specify ... (http://svn.fhem.de/trac/changeset/13071/trunk)