Rules for transform

Setup, Configuration and Use Beginners
,
1

Hi.
OpenHAB received temperature from modbus, like “temperature*100”. (Temperature 23.45 I’m received as 2345)
How I must write rules for transrorm this items to back?

rule “Street_Temperature”
when
Item BME_Temperature received update
then
BME_Temperature = BME_Temperature/100
end

It is not worked…

2 
rule “Street_Temperature”
when
    Item BME_Temperature received update
then
    BME_Temperature.postUpdate(BME_Temperature.state / 100)
end
3 
# more home.rules
org.eclipse.smarthome.core.items
org.eclipse.smarthome.core.persistence
org.eclipse.smarthome.core.library.types
org.eclipse.smarthome.core.library.items
org.eclipse.smarthome.model.script.actions

rule "Street_Temperature"
when
    Item BME_Temperature received update
then
    BME_Temperature.postUpdate(BME_Temperature.state/100)
end

Loading model ‘home.rules’
Configuration model ‘home.rules’ is either empty or cannot be parsed correctly!

:frowning:

Items:
Number BME_Temperature "Температура на улице [%d °C]" <temperature> (gBME280) {modbus="slave5:0"}

Sitemaps:
Text label=“Weather”
{
Text item=BME_Temperature label=“Temperature”
}

4

Remove ALL this:

# more home.rules
org.eclipse.smarthome.core.items
org.eclipse.smarthome.core.persistence
org.eclipse.smarthome.core.library.types
org.eclipse.smarthome.core.library.items
org.eclipse.smarthome.model.script.actions
5

STOP!!

That will not work. We’ll create an infinite loop

6

You need to create another item:

Number BME_Temperature100 (gBME280) {modbus="slave5:0"}
Number BME_Temperature "Температура на улице [%.1f °C]" <temperature>

rule "Street_Temperature"
when
    Item BME_Temperature100 changed
then
    BME_Temperature.postUpdate(BME_Temperature100.state / 100)
end
7

2019-02-18_14-59-05
I’m in the hell… :slight_smile:

8

For modbus incoming data, you can put the transform directly in the data thing. No rule or extra Item needed.
There are examples in the modbus documentation.

9

Sorry, but this not worked… On the site “Temperature” is empty…

10

What didn’t work?
Post your items now and you rule file

11

#more rules/home.rules

rule "Street_Temperature"

when
    Item BME_Temperature100 changed
then
    BME_Temperature.postUpdate(BME_Temperature100.state/100)
end

Items:

Number BME_Temperature100 (gBME280) {modbus=“slave5:0”}
Number BME_Temperature “Температура на улице [%.1f °C]”

In log:

Rule ‘Street_Temperature’: Unknown variable or command ‘/’; line 6, column 32, length 28

12 
    BME_Temperature.postUpdate((BME_Temperature100.state as Number) / 100)
13

Rule ‘Street_Temperature’: An error occurred during the script execution: Could not access field: HomeRules.BME_Temperature on instance: null
Refreshing model ‘home.rules’
Rule ‘Street_Temperature’: Could not cast NULL to java.lang.Number; line 5, column 31, length 31

14 
rule "Street_Temperature"

when
    Item BME_Temperature100 changed
then
    logInfo("BME_Temperature100:", BME_Temperature100.state.toString)
    BME_Temperature.postUpdate((BME_Temperature100.state as Number) / 100)
end

What’s in the log?

1 Like
15

Sorry, all worked! I’m wrong… :slight_smile:

THX!!!