[SOLVED] Homematic Battery check - What's wrong?

Setup, Configuration and Use Scripts & Rules
1 
rule "Batterie leer"
  when
    Item gBattery changed to ON
  then
    val lastitem = gBattery.members.filter[i | i.lastUpdate !== null].sortBy[lastUpdate].last
      sendTelegram("main",lastitem.label+": Bitte Batterie wechseln !")
end

with

Group:Switch:OR(ON, OFF) gBattery

comes to the following error message, Why?

[ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Batterie leer': java.lang.Double cannot be cast to java.lang.String

2

Add some logInfo to find out what line the rule breaks

rule "Batterie leer"
when
    Item gBattery changed to ON
then
    logInfo("RULE","BREAK 1")
    val lastitem = gBattery.members.filter[i | i.lastUpdate !== null].sortBy[lastUpdate].last
    logInfo("RULE","BREAK 2")
    sendTelegram("main",lastitem.label+": Bitte Batterie wechseln !")
end
3

I’m using this somewhere in my rules:

val lastItem = Windows.members.filter[ w | w.lastUpdate !== null ].sortBy[ lastUpdate ].last
val String nameOfItem = lastItem.name

The only difference I can see are the spaces after [ and before ] and lastItem.name instead of .label. But not sure as I don’t know the Telegram-Command itself. Hope this helps :slight_smile:

4

I changed both and now I am again with another fault I thought I solved already:

2018-10-06 10:31:26.819 [INFO ] [.eclipse.smarthome.model.script.RULE] - BREAK 1
2018-10-06 10:31:27.201 [ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Batterie leer': null

Thought with putting the values “everyminute” into persistence should result in no "null"s. At least I have to have more time to check this. Meanwhile any hints are welcome …

5

Your solution is much too complex. Have a look here:

rule "Batterie leer"
when
    Member of gBattery changed to ON
then
    sendTelegram("main",triggeringItem.label+": Bitte Batterie wechseln !")
end
3 Likes
6

Looks like a quite easier solution and it seems to work :smiley:
Knowing that syntax will most likely also help me in other rules.

Thanks !