Hello @ewgor, I follow you on another forum about this subject and are interested myself of this system. I found in the code you posted a small error - might this to be the problem. Please let me your email address - I would like to talk about this topic @ewgor said: Rules: var HashMap<String, String> sensorToItemsMap = newLinkedHashMap( "101;1;" -> "lightBar01", // looks good "lightBar01" -> "101;1;", "101;2;" -> "lightBar01", // <<<<<--------------------------HERE----------------:) "lightBar02" -> "101;2;" )