i use json and http cache to read informations from powerstrip:
Number PowerStrip_1_Port_1_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[0])]" }
Number PowerStrip_1_Port_2_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[1])]" }
Number PowerStrip_1_Port_3_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[2])]" }
Number PowerStrip_1_Port_4_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[3])]" }
Number PowerStrip_1_Port_5_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[4])]" }
Number PowerStrip_1_Port_6_Watt_Org {http="<[PowerStrip1:2000:JSONPATH($.data.watt[5])]" }
I’ve added this Items at sitemap and it works fine. But i need to convert the number.
I tried it with a rule to convert the state itself. but it will repeat the change event endless. So i try to put the this state to an other Item:
Number PowerStrip_1_Port_1_Watt "Verbrauch"
Number PowerStrip_1_Port_2_Watt "Verbrauch"
Number PowerStrip_1_Port_3_Watt "Verbrauch"
Number PowerStrip_1_Port_4_Watt "Verbrauch"
Number PowerStrip_1_Port_5_Watt "Verbrauch"
Number PowerStrip_1_Port_6_Watt "Verbrauch"
with this rule:
rule "Watt"
when
Item PowerStrip_1_Port_1_Watt_Org changed or
Item PowerStrip_1_Port_2_Watt_Org changed or
Item PowerStrip_1_Port_3_Watt_Org changed or
Item PowerStrip_1_Port_4_Watt_Org changed or
Item PowerStrip_1_Port_5_Watt_Org changed or
Item PowerStrip_1_Port_6_Watt_Org changed
then
val watt = (triggeringItem.state as Number)/1000
val gItemName2 = triggeringItem.name.replace("_Org","")
//logWarn("Wattänderung.test", triggeringItem.name.toString() )
logWarn("Wattänderung.test", gItemName2 )
postUpdate(gItemName2,watt)
end
but i get follow error message:
==> /var/log/openhab2/events.log <==
[vent.ItemStateChangedEvent] - PowerStrip_1_Port_1_Watt_Org changed from 6996 to 5469
==> /var/log/openhab2/openhab.log <==
[WARN ] [thome.model.script.Wattänderung.test] - PowerStrip_1_Port_1_Watt
[ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Watt': An error occurred during the script execution: Could not invoke method: org.eclipse.smarthome.model.script.actions.BusEvent.postUpdate(java.lang.String,java.lang.String) on instance: null
if i use “PowerStrip_1_Port_1_Watt” in postUpdate directly, so it will work.
I think, you cann’t use a variable item name for PostUpdate.
Is it to convert Watt to KW?
rule "Watt P1"
when
Item PowerStrip_1_Port_1_Watt_Org changed
then
PowerStrip_1_Port_1_Watt.postUpdate((PowerStrip_1_Port_1_Watt_Org.state as Number)/1000)
end
rule "Status"
when
Item PowerStrip_1_Port_1_Status changed or
Item PowerStrip_1_Port_2_Status changed or
Item PowerStrip_1_Port_3_Status changed or
Item PowerStrip_1_Port_4_Status changed or
Item PowerStrip_1_Port_5_Status changed or
Item PowerStrip_1_Port_6_Status changed
then
//val status = if(PowerStrip_1_Port_1_Status.state == 1) "ON" else "OFF"
val status = if(triggeringItem.state == 1) "ON" else "OFF"
val gItemName = triggeringItem.name.replace("_Status","")
logWarn("StartPostUpdate",status)
postUpdate(gItemName,status)
end
its exactly the same with other items and convert the state from 0:1 to on:off
That will work. In fact, this is the only time I recommend using the postUpdate Action over the Item method. The post update Action takes two Strings are arguments, the name of the Item and a String version of the new state.
You need to call toString on watt. The postUpdate Action will only accept Strings. Sometimes the Rules DSL is able to convert objects to Strings automatically but there are a few cases where it often fails to do so, namely enum types (e.g. ON/OFF, OPEN/CLOSED, etc) and Numbers.
