Setting temperature on Homematic HM-TC-IT-WM-W-EU

Setup, Configuration and Use Items & Sitemaps
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1

Hi,

I want to set the target temperature on a HM-TC-IT-WM-W-EU wall thermostat. I am using the Homematic binding with Homegear.

This is the item definition:

Number	Wohnzimmer_SET_TEMP "Soll-Temperatur [%.1f °C]" (Grp_Wohnzimmer) { homematic="MEQ1835202, channel=2, parameter=SET_TEMPERATURE"}

and the setpoint definition in the sitemap:

Setpoint item=Wohnzimmer_SET_TEMP label="Soll-Temperatur Wohnzimmer [%.1f °C]" step=0.5 minValue=15 maxValue=30

Problem is, openhab does not even show the current value for the data point. As a result, I cannot change it.

Anyone has a suggestion how to fix this?

What I experienced, when trying to read the value directly with homegear, is that getValue (https://www.homegear.eu/index.php/GetValue) throws an exception when called with requestFromDevice = true. Is it possible the binding is using this parameter?

2

I can’t help with the homematic part of the problem. But I can say that a setpoint will not work until your Number Item has a value other than NULL.

While trying to figure out the homematic part of the problem I recommend putting the Item on your sitemap as a Text for now and not moving to a setpoint until the - turns to a number.

3

Which version of homegear are you using and have you tried to show the value inside the homegear console. I’ve got the same device running for 2 years now, with oh1 and oh2.

4

I am running Homegear 0.6.12. I can read the value using

$hg->getValue(<peer id>, 2, "SET_TEMPERATURE", false)

When using

$hg->getValue(<peer id>, 2, "SET_TEMPERATURE", true)

instead, homegear throws an exception.

5

Hmm. I am using 0.6.7 and I can set temperature through openhab without any problem. I will try your PHP commands later. Haven’t used the PHP interface for a while now.

6

Did you already have the chance to try it?

Please post your item and Setpoint definition, if you were successful.

Thanks,
Philipp

7

Sorry… two little ones at home and no free time up to now…

I´ve just tried to fire these scripts… but I can actually not find how to execute this. Could you give me a hint?

Here´s my item definition…

Number  lR_Wandthermostat_RSSI         "lR_Wandthermostat RSSI [%d dBm]"                                      <signal>                (lR,W,gRSSI)                                      { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:0#RSSI_DEVICE" }
Switch  lR_Wandthermostat_Unreach      "lR_Wandthermostat unreachable"                                        <siren>                 (lR,W,gUnreach)                                   { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:0#UNREACH" }
Switch  lR_Wandthermostat_Pending      "lR_Wandthermostat config pending"                                     <siren>                 (lR,W,gPending)                                   { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:0#CONFIG_PENDING" }
Number  lR_Wandthermostat_Battery      "lR_Wandthermostat Batteriezustand [%.1f V]"                           <battery>               (lR,W,gBatterie)                                  { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#BATTERY_STATE" }
String  lR_Wandthermostat_Fault        "lR_Wandthermostat Fehlerwert [MAP(HM-CC-RT-DN.map):%s]"               <error>                 (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:4#FAULT_REPORTING" }
Number  lR_Wandthermostat_ActTemp      "lR_Wandthermostat Ist-Temperatur [%.1f °C]"                           <temperature>  (lR,gHeatAct,lR_Heat)  [ "CurrentTemperature" ]            { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:1#TEMPERATURE" }
Number  lR_Wandthermostat_ActHum       "lR_Wandthermostat Luftfeuchtigkeit [%.0f %%]"                                                 (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:1#HUMIDITY" }
Number  lR_Wandthermostat_SetTemp      "lR_Wandthermostat Soll-Temperatur [%.1f °C]"                          <temperature>  (lR,gHeatSet,lR_Heat)  [ "TargetTemperature" ]             { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#SET_TEMPERATURE" }
Switch  lR_Wandthermostat_Auto         "lR_Wandthermostat Auto-Mode"                                          <temperature>           (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#AUTO_MODE" }
Number  lR_Wandthermostat_Manu         "lR_Wandthermostat Manu-Mode [%.1f °C]"                                <temperature>           (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#MANU_MODE" }
Switch  lR_Wandthermostat_BoostMode    "lR_Wandthermostat Boost-Mode"                                         <temperature>           (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#BOOST_MODE" }
Number  lR_Wandthermostat_BoostTime    "lR_Wandthermostat Boost-Restdauer [%d min]"                           <"clock-on">            (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#BOOST_STATE" }
Switch  lR_Wandthermostat_Lowering     "lR_Wandthermostat Spar Modus"                                         <temperature>           (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#LOWERING_MODE" }
Switch  lR_Wandthermostat_Comfort      "lR_Wandthermostat Konfort Modus"                                      <temperature>           (lR)                                              { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#COMFORT_MODE" }
Number  lR_Wandthermostat_Mode         "lR_Wandthermostat Betriebsart [MAP(HM-CC-RT-DN.map):%s]"              <temperature>  (lR,gHeatMode,lR_heat)  [ "homekit:HeatingCoolingMode" ]   { channel="homematic:HG-HM-TC-IT-WM-W-EU:homegear:LEQXXXXXX:2#CONTROL_MODE" }
Number  lR_Wandthermostat_SetMode      "lR_Wandthermostat Betriebsart Auswahl [MAP(HM-CC-RT-DN.map):%s]"      <"heating-80">          (lR,gInitNone)
Number  lR_Wandthermostat_Preset       "lR_Wandthermostat Soll-Temperatur Schnellauswahl"                     <"heating-40">          (lR,gInitNone)
Number  lR_Wandthermostat_EcoTemp      "lR_Wandthermostat Spar-Temperatur [%.1f °C]"                                                  (lR,value_persist)
Number  lR_Wandthermostat_ComfTemp     "lR_Wandthermostat Komfort-Temperatur [%.1f °C]"                                               (lR,value_persist)
String  lR_Wandthermostat_Summary      "lR_Wandthermostat Übersicht [%s]"                                     <heating>               (lR)

And here´s my sitemap

Setpoint item=lR_Wandthermostat_SetTemp label="Wohnzimmer" icon="temperature"

I´ve used the configs from @ThomDietrich … really good stuff… have a look

https://github.com/ThomDietrich/openhab-config

1 Like
8

Thanks!
However, just so you know: My heating control was not bug free and overhauling it is on my todo list. Please do not expect the solution there to be perfect. I was planning to switch over to have the thermostat in MANU mode all the time and a schedule in openHAB. Hows your systems state?

9

It’s exactly what I do. I just use the manu mode and control the temperature by cron based rules and some switches for presence control.

But I really like your clean item scheme. Working good for me.

1 Like