-COMMAND:= power $LICHTID (on|off) | listen $EVENT | sample $SAMPLEDEV
-LICHTID:= werkzeug | stereo | labor | schreibtisch | logo | idee
-EVENT:= all | temp | movement | button
-SAMPLEDEV:=temp[0-9]+
+COMMAND:= power (on|off) $POWERID | listen $EVENT | sample $SAMPLEDEV | log <logtext>
+POWERID:= werkzeug | stereo | labor | schreibtisch | logo | idee
+EVENT:= all | request | sensor | movement | button | none
+SAMPLEDEV:=temp[0-9]+ | photo[0-9]+ | <sensor???>[0-9]+
+
+Notes:
+ * subscription to events is cummulativ
+ * the "sample" command instructs the daemon to immediately get new sensor data of device $SAMPLEDEV