[SOLVED] Migrate Stiebel-Eltron LWZ403+ISGWeb to OH2.4 and new modbus-binding-2.4.0

Stefan83 · January 18, 2019, 8:57am

Hi Jens,
yes, it’s “Option 1”.
I just had a phone conversation with the technical support of Tecalor.
The problem is, that on my ISGweb “EMI Energymanagement” is active (for connecting with my SMAphotovoltaic system). And: You can’t have Modbus and EMI active on the same ISGweb
Learning never stops!
So i have to find another way to get the data from my tecalor system.

shorty707 · February 6, 2019, 1:12pm

Hey.
I assume you now have created many more things / items to read data from your heating.
I am just connecting now opnehab to my ISG and if you have more things / items to share that would be a real timesaver
cheers

JensF · February 6, 2019, 7:16pm

Hi Shorty,

here is my latest config:

Things

Bridge modbus:tcp:lwz [ host="172.27.1.112", port=502, id=1 ] {   
    
// Lueftersteuerung
Bridge poller luefter [ start=1000, length=27, refresh=1000, type="holding" ] {
	Thing data STUFETAG [ readStart="1017", readValueType="int16", writeStart="1017", writeValueType="int16", writeType="holding" ]
	Thing data STUFENACHT [ readStart="1018", readValueType="int16", writeStart="1018", writeValueType="int16", writeType="holding" ]
	
}

// Systemparameter (Holding r+w)
Bridge poller heizungsdaten1 [ start=1000, length=27, refresh=1000, type="holding" ] {
	Thing data WWSOLLTAG [ readStart="1011", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data WWSOLLNACHT [ readStart="1012", readValueType="int16", readTransform="JS(divide10.js)" ]
	
	// Issue with datatype 7
	Thing data HK1STEIGUNG [ readStart="1007", readValueType="int16", readTransform="JS(divide100.js)" ]
	Thing data HK1FUSSPUNKT [ readStart="1008", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data HK2STEIGUNG [ readStart="1009", readValueType="int16", readTransform="JS(divide100.js)" ]
	Thing data HK2FUSSPUNKT [ readStart="1010", readValueType="int16", readTransform="JS(divide10.js)" ]
}

// Systemwerte (InputRegister)
Bridge poller heizungsdaten2 [ start=0, length=31, refresh=1000, type="input" ] {
	Thing data RAUMISTTEMPHK1 [ readStart="0", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data RAUMSOLLTEMPHK1 [ readStart="1", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data AUSSENTEMPERATUR [ readStart="6", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data WWISTTEMP [ readStart="15", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data WWSOLLTEMP [ readStart="16", readValueType="int16", readTransform="JS(divide10.js)" ]
	Thing data KOLLEKTORTEMPERATUR [ readStart="26", readValueType="int16", readTransform="JS(divide10.js)" ]	
}

// Energetische Daten (InputRegsiter)
Bridge poller energetik [ start=3000, length=32, refresh=1000, type="input" ] {
	Thing data PHEIZUNGTAG [ readStart="3021", readValueType="int16" ]
	Thing data PHEIZUNGSUMME1 [ readStart="3022", readValueType="int16" ]
	Thing data PHEIZUNGSUMME2 [ readStart="3023", readValueType="int16" ]
	Thing data PWWTAG [ readStart="3024", readValueType="int16" ]
	Thing data PWWSUMME1 [ readStart="3025", readValueType="int16" ]
	Thing data PWWSUMME2 [ readStart="3026", readValueType="int16" ]
	Thing data ELEKTRNEHEIZEN [ readStart="3030", readValueType="int16" ]
	Thing data ELEKTRNEWW [ readStart="3031", readValueType="int16" ]
}

}

Items
// Systemparameter
Number WWSOLLTAG “WW-Soll-Tag [%.1f °C]” { channel=“modbus:data:lwz:heizungsdaten1:WWSOLLTAG:number”, autopudate=“false” }
Number WWSOLLNACHT “WW-Soll-Nacht [%.1f °C]” { channel=“modbus:data:lwz:heizungsdaten1:WWSOLLNACHT:number”, autopudate=“false” }
Number HK1FUSSPUNKT “Fusspunkt HK1 [%.1f °C]” { channel=“modbus:data:lwz:heizungsdaten1:HK1FUSSPUNKT:number”, autopudate=“false” }
Number HK1STEIGUNG “Steigung HK1 [%.2f]” { channel=“modbus:data:lwz:heizungsdaten1:HK1STEIGUNG:number”, autopudate=“false” }
Number HK2FUSSPUNKT “Fusspunkt HK2 [%.1f °C]” { channel=“modbus:data:lwz:heizungsdaten1:HK2FUSSPUNKT:number”, autopudate=“false” }
Number HK2STEIGUNG “Steigung HK2 [%.2f]” { channel=“modbus:data:lwz:heizungsdaten1:HK2STEIGUNG:number”, autopudate=“false” }

// Systemwerte
Number RAUMISTTEMPHK	"Raum-Ist [%.1f °C]"			{ channel="modbus:data:lwz:heizungsdaten2:RAUMISTTEMPHK1:number", autopudate="false" }
Number RAUMSOLLTEMPHK	"Raum-Soll [%.1f °C]"			{ channel="modbus:data:lwz:heizungsdaten2:RAUMSOLLTEMPHK1:number", autopudate="false" }
Number WWISTTEMP        "WW-Ist [%.1f °C]"				{ channel="modbus:data:lwz:heizungsdaten2:WWISTTEMP:number", autopudate="false" }
Number WWSOLLTEMP		"WW-Soll [%.1f °C]"				{ channel="modbus:data:lwz:heizungsdaten2:WWSOLlTEMP:number", autopudate="false" }
Number AUSSENTEMPERATUR	"Aussen-Temp [%.1f °C]"			{ channel="modbus:data:lwz:heizungsdaten2:AUSSENTEMPERATUR:number", autopudate="false" }
Number KOLLEKTORTEMPERATUR "Kollektor-Temp [%.1f °C]"	{ channel="modbus:data:lwz:heizungsdaten2:KOLLEKTORTEMPERATUR:number", autopudate="false" }


// Energetische Daten
Number PHEIZUNGTAG		"P-Heizung-Tag [%d kWh]"		{ channel="modbus:data:lwz:energetik:PHEIZUNGTAG:number", autopudate="false" }
Number PHEIZUNGSUMME1	"P-Heizung-Summe1 [%d kWh]"		{ channel="modbus:data:lwz:energetik:PHEIZUNGSUMME1:number", autopudate="false" }
Number PHEIZUNGSUMME2	"P-Heizung-Summe2 [%d mWh]"		{ channel="modbus:data:lwz:energetik:PHEIZUNGSUMME2:number", autopudate="false" }
Number ELEKTRNEHEIZEN	"ELEKTR. NE HEIZEN [%d h]" 		{ channel="modbus:data:lwz:energetik:ELEKTRNEHEIZEN:number", autopudate="false" }
Number ELEKTRNEWW 		"ELEKTR. NE WW [%d h]" 			{ channel="modbus:data:lwz:energetik:ELEKTRNEWW:number", autopudate="false" }
Number PWWTAG			"P-WW-Tag [%d kWh]"				{ channel="modbus:data:lwz:energetik:PWWTAG:number", autopudate="false" }
Number PWWSUMME1		"P-WW-Summe1 [%d kWh]"			{ channel="modbus:data:lwz:energetik:PWWSUMME1:number", autopudate="false" }
Number PWWSUMME2		"P-WW-Summe2 [%d mWh]"			{ channel="modbus:data:lwz:energetik:PWWSUMME2:number", autopudate="false" }



// Luefter
Number STUFETAG			"Stufe Tag"						{ channel="modbus:data:lwz:luefter:STUFETAG:number", autopudate="false" }
Number STUFENACHT		"Stufe Nacht"					{ channel="modbus:data:lwz:luefter:STUFENACHT:number", autopudate="false" }

Sitemap

sitemap lwz label=“LWZ”
{

Frame label=“Lueftersteuerung” {
Switch item=STUFETAG mappings=[0=“OFF”, 1=“MIN”, 2=“MED”, 3=“MAX”]
Switch item=STUFENACHT mappings=[0=“OFF”, 1=“MIN”, 2=“MED”, 3=“MAX”]
}

Frame label=“Sytemwerte” {
  Text item=RAUMISTTEMPHK
  Text item=RAUMSOLLTEMPHK
  Text item=WWISTTEMP
  Text item=WWSOLLTAG
  Text item=AUSSENTEMPERATUR
  Text item=KOLLEKTORTEMPERATUR
}

Frame label=“Energetische Werte” {
Text item=ELEKTRNEHEIZEN
Text item=ELEKTRNEWW
Text item=PHEIZUNGTAG
Text item=PWWTAG
Text item=PHEIZUNGSUMME2
Text item=PHEIZUNGSUMME1
Text item=PWWSUMME2
Text item=PWWSUMME1
}

Frame label=“Heizungssteuerung” {
Text item=HK1FUSSPUNKT
Text item=HK1STEIGUNG
Text item=HK2FUSSPUNKT
Text item=HK2STEIGUNG
}
}

Did not yet configure rules

Cheers,
JF

shorty707 · February 6, 2019, 8:48pm

Thanks
I already read some values because of your great support which helps so much to learn fast!

I have ISG on latest firmware and a WPM4 heatpump.
Odd thing … the registers from the manual PDF are incorrect for WPM4 …
I definately e.g. read “Outside Temp (Aussentemperatur)” on 506 … manual says 507.

My next question would be …
could you share the divide10.js etc scripts for the transformations ?
does that transformation “on the fly” also work for write actions?

thanks !!

EDIT:
OK - found this on the manual now… for some reason they say everything could off by 1 register index.
Modbus is too new for me to understand what they mean with “1 based”.

rossko57 · February 6, 2019, 8:57pm

See the modbus binding documentation, ‘Transformations’

JensF · February 6, 2019, 9:04pm

Hi Shorty,

yes you are correct the addressing is -1 so if you want to read register 1001 you have to put register 1000 in your OpenHab configuration.

transform/divide10.js

// Wrap everything in a function (no global variable pollution)
// variable "input" contains data passed by openhab
(function(inputData) {
// on read: the polled number as string
// on write: openHAB command as string
var DIVIDE_BY = 10;
return parseFloat(inputData) / DIVIDE_BY;
})(input)

I did not try to write value that need to be transformed, but this works similarly. I think it was explained in the docu: https://www.openhab.org/addons/bindings/modbus/#modbus-binding

I will as well look into this once I have more time.

Jens

Stylewarz3 · February 10, 2019, 12:02pm

Hi Jens,

I would like to control the fan with Alexa. Can you help me with that?

Greetings

JensF · February 10, 2019, 2:27pm

Hi Stlyewarz3,

I am not integrating with Alexa yet, however I think once you have the OpenHAB skill setup and you can control the fan from OpenHAB now that this should as well work via Alexa:

OpenHAB Alexa Skill

Why would you do that via Alexa though? There is 2 reasons to adjust fan speed: outside temperature (you do not want to get the hot air in summer into the house) and air quality (which you could measure with NetAtmo modules which have built-in CO2 sensors).

A third could be noise - but if your system is correctly configured you should not have annoying noise.

Best,

Jens

Stylewarz3 · February 10, 2019, 4:00pm

Hi,
I want to put the levels 0,1,2,3 with Alexa. alexa needs a switch, but a switch has only two states. So I need 4 switches, each with a status (0, 1, 2, 3). Or do you have another idea?

JensF · February 10, 2019, 4:31pm

I have fixed this in OpenHAB with declaring the item itself as number and then work with a mapping in OpenHAB

Frame label=“Lueftersteuerung” {
Switch item=STUFETAG mappings=[0=“OFF”, 1=“MIN”, 2=“MED”, 3=“MAX”]
Switch item=STUFENACHT mappings=[0=“OFF”, 1=“MIN”, 2=“MED”, 3=“MAX”]
}

As said I did not work with Alexa yet but I use the REST API and basically you can set the value - maybe you could say Alexa, fan level 0…?

Jens

Darbur8 · January 29, 2023, 6:15am

Hi Jens,

Do you have any experience with trying integrate the new LWZ 180 & 280 machines with modbus? If so can you help? @JensF

JensF · January 29, 2023, 7:14am

Hi @Darbur8,

it seems these are not compatible with the ISG Web interface which is needed (or recommended, I think there was a guide on the web to create your own serial adapter, too).

You can check out the ISG docu if you find references to supported devices:

[https://www.stiebel-eltron.de/content/dam/ste/cdbassets/historic/bedienungs-_u_installationsanleitungen/ISG_Modbus__b89c1c53-6d34-4243-a630-b42cf0633361.pdf](https://Stiebel Eltron LWZ)

Best,
Jens

Darbur8 · March 6, 2023, 12:09pm

Hi @JensF

Thank you for your reply.

Do you have the guide at hand? Or can you tell me where I can find a it?

JensF · March 6, 2023, 4:44pm

I just searched on Google and found this: lwz180/README.md at main · kdarnok/lwz180 · GitHub

Maybe it helps - I am afraid I cannot help you further.

Jens

Pinocchio · July 27, 2023, 7:22am

How to transform in Openhab 4.0.0?
It seems as the JS transform (divide10) is not available anymore?

JensF · July 27, 2023, 4:27pm

There seems to be discussions on this within the community already, check out this thread

I am yet to move on to OH4, currently on 3.4.4

Jens

Pinocchio · July 30, 2023, 3:48pm

I’m trying to set the warm water temperature in the modbus stiebel isg binding - default name water temperature set point - but if I enter 37 (for 37°C) it shows a few seconds the value, but falls back to the currently set valvue (44°C in my case) and is not transmitted to the ISG.
In the former version (modbus without stiebel extension) I’ve transmitted 370 (due to the data type) - that worked.
What do I need to do to get it done with the new official binding?

splatch · July 30, 2023, 8:50pm

Modbus binding support read/write transformation. You need to scale values according to ISG thresholds.

Pinocchio · July 31, 2023, 4:15am

But what in Detail do I need to send? I tried various values,read once again the Stiebel ISG modbus pdf, in case I miss something…?
Please advice,
thanks, Christian

splatch · July 31, 2023, 8:01am

Look for examples involving ie. javascript transformations and divide.js examples on the forum. Whole trick you need is making i.e $ohState*10 during write and $isgValue/10 while reading. Even this topic includes an example: [SOLVED] Migrate Stiebel-Eltron LWZ403+ISGWeb to OH2.4 and new modbus-binding-2.4.0 - #19 by JensF

Please note that openHAB 4.0 changes a bit syntax for calling transformation services, so many of available blueprints may require further tweaking.