Rule for correction of temperature – can´t solve the problem without help

Setup, Configuration and Use Scripts & Rules
,
1

Hi,
i want to correct the value of a sensor (Sonoff-Tasmota, AM2301) by a rule.

in my items:

Number KG_TH10_2_Temperatur		"Außentemperatur [%.1f °C]" 			<temperature>
Number AT_korr					"Außentemperatur korr [%.1f °C]" 		<temperature>

in my sitemap

Text item=KG_TH10_2_Temperatur
Text item=AT_korr

and the rule:

//Rule zur Korrektur der Temperatursensoren 07.01.2018

import org.eclipse.smarthome.core.items
import org.eclipse.smarthome.core.persistence
import org.eclipse.smarthome.core.library.types
import org.eclipse.smarthome.core.library.items
import org.eclipse.smarthome.model.script.actions

Rule "Temperaturkorrektur KG_TH10_2_Temperatur Sonoff-Sensoren"
when
	Item KG_TH10_2_Temperatur changed
then
// korrigiere um -2 Grad
	Var_AT = KG_TH10_2_Temperatur.state as DezimalType
	var Number Var_AT_korr = Var_AT - 2
	AT_korr.postUpdate(Var_AT_korr)
end

but it does´nt work:

2018-01-21 13:08:40.132 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'tempsensor.rules'

2018-01-21 13:08:40.160 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model 'tempsensor.rules' is either empty or cannot be parsed correctly!

2018-01-21 13:08:40.426 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model 'tempsensor.rules' has errors, therefore ignoring it: [7,8]: no viable alternative at input 'Rule'

[16,2]: missing EOF at 'AT_korr'

what is the mistake?

Thanks anybody for help!

2

What happens if you write it less complicated:

Rule "Temperaturkorrektur KG_TH10_2_Temperatur Sonoff-Sensoren"
when
	Item KG_TH10_2_Temperatur changed
then
	// korrigiere um -2 Grad
	AT_korr.postUpdate( KG_TH10_2_Temperatur.state - 2)
end
3

So I changed it, and the word “Rule” meanwhile in small letters, Nikolas pointed me out…

2018-01-21 13:46:35.280 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model 'tempsensor.rules' has errors, therefore ignoring it: [7,8]: no viable alternative at input 'Rule'

the rule just looked like yours and it got more and more complicated because it did not work

4

rule is written in small letters…

5

oh no, how stupid. Much better. Thanks!
But now the Raspi can not subtract:

2018-01-21 13:58:59.070 [ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Temperaturkorrektur KG_TH10_2_Temperatur Sonoff-Sensoren': Unknown variable or command '-'; line 14, column 23, length 30
6

problem solved, step by step, thanks for the help!

rule "Temperaturkorrektur KG_TH10_2_Temperatur Sonoff-Sensoren"
when
	Item KG_TH10_2_Temperatur changed
then
	// korrigiere um -2 Grad
	AT_korr.postUpdate( KG_TH10_2_Temperatur.state as Number - 2 )
end