platform is used and what version: RasPi with openHAB version: 2.5.7
Hi,
i have a TASMOTA device with 4 DS18B20 temperature sensors connected. Each sensor has a worldwide unique Id. TASMOTA scans the sensors, numbers them with DS18B20-n and builds dynamicaly this JSON:
{ "Time":"2020-08-03T19:43:02",
"DS18B20-1":{"Id":"021561B10FFF","Temperature":20.1},
"DS18B20-2":{"Id":"0215C16EB2FF","Temperature":20.2},
"DS18B20-3":{"Id":"0316837F68FF","Temperature":18.8},
"DS18B20-4":{"Id":"0516738AD2FF","Temperature":20.1},
"TempUnit":"C"}
I defined a thing with the following channels to extract the Values of these sensors:
Thing mqtt:topic:Hzg "Heizung" (mqtt:broker:myMqttBroker) {
Channels:
Type string : Ruecklauf_T "Temperatur RĂĽcklauf" [ stateTopic="t31/tele/SENSOR", transformationPattern="JSONPATH:$.DS18B20-1.Temperature" ]
Type string : Heizkeller_T "Temperatur Heizkeller" [ stateTopic="t31/tele/SENSOR", transformationPattern="JSONPATH:$.DS18B20-2.Temperature" ]
Type string : Aussen_T "Temperatur Aussen" [ stateTopic="t31/tele/SENSOR", transformationPattern="JSONPATH:$.DS18B20-3.Temperature" ]
Type string : Vorlauf_T "Temperatur Vorlauf" [ stateTopic="t31/tele/SENSOR", transformationPattern="JSONPATH:$.DS18B20-4.Temperature" ]
}
At a first view, this looks good and is working. But it happens in some rare situations, that after rebooting, TASMOA does not see all sensors, but e.g. only 3 of them. So the numbering of the sensors gets cluttered and channel assignment is wrong now. The same happens, if i add more Sensors. Then they are sorted in alphabetically and clutter the rest of the entries.
So my question:
Is it possible to filter the entries with the help of their Id? Because the Id is always assigned to the physical Sensor and can not change.
For example i want to read Ruecklauf_T always from the Sensor with Id “021561B10FFF”
Has anyone an idea how to solve this in openHAB2 ?
Michi