[120] opentherm gateway

For OpenTherm-gateway related questions in Domoticz
travee
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Re: [120] opentherm gateway

Postby travee » Saturday 16 January 2016 23:24

sincze wrote:
Sjonnie wrote:Hello

I try to get the opentherm gateway in combination with the lan/wifi interface working. I have tried to get communication going via port 1001 as the manual tells me. Is there somebody who has this setup (otwg + tplink 703) working in Domoticz? And maybe can confirm i' am using the right port?

Thanks


I configured OTGW via TP Link within Domoticz.
First I received some errors, (OTGW-2) then after one minute the device was recognised (OTGW-1).
What does your domoticz log say?

Did you configure the TPLInk startup script correctly?

Sándor

I try to connect Domoticz and OTGW using a TPLink WR703N, but I keep getting these errors. My settings in the WR703N can't be the problem because OTMonitor works fine. I always make sure I kill OTMonitor before I start Domoticz.

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Re: [120] opentherm gateway

Postby jake » Thursday 04 February 2016 22:54

My 'heating the house' goal is that I can heat each room in the house individually. Does the OTGW fit in that strategy?
I know I need remote controlled valves like the Danfoss + thermostats/temperature sensors in those rooms. Missing is the 'turn boiler on' configuration.

Before I knew about the OTGW, my idea was to make a relay contact at the boiler, connected to the anti-freeze connection of the boiler. Closing that contact will make the boiler think it is necessary to turn on, in order to prevent freezing of pipes and radiators in the system. This 'anti-freeze' system bypasses the open therm completely, I assume.

Verstuurd vanaf mijn Transformer TF101 met Tapatalk

Draakje
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Re: [120] opentherm gateway

Postby Draakje » Wednesday 10 February 2016 22:08

Has someone translated the english terms to dutch ?

Saves me the trouble :)

If that someone could share it please :)

Many thanks!
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mvzut
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Re: [120] opentherm gateway

Postby mvzut » Tuesday 23 February 2016 16:15

jake wrote:My 'heating the house' goal is that I can heat each room in the house individually. Does the OTGW fit in that strategy?
I know I need remote controlled valves like the Danfoss + thermostats/temperature sensors in those rooms. Missing is the 'turn boiler on' configuration.

Before I knew about the OTGW, my idea was to make a relay contact at the boiler, connected to the anti-freeze connection of the boiler. Closing that contact will make the boiler think it is necessary to turn on, in order to prevent freezing of pipes and radiators in the system. This 'anti-freeze' system bypasses the open therm completely, I assume.

Verstuurd vanaf mijn Transformer TF101 met Tapatalk

I use the OTGW for this purpose, simply because I already had one. If you don't really need an OTGW you could certainly do it in the way you describe. Having said that, the OTGW is a lot of fun (gathering all kinds of data about your central heating system), and you can override the thermostat setpoint when you're away.

What I did is simply increase the thermostat setpoint in the living room when I need the boiler to start. To avoid that the living room gets too hot, you can add remote controlled valves to all your radiators there. Or, as I did it, add a central valve near the boiler that shuts off the whole living room section (including floor heating) when the temperature in that room is above the setpoint.

The downside of this approach is that you have effectively reduced your smart modulating heating system to a simple on-off system (unless only the living room needs heat). In my case, I rarely need heat when the boiler is off (only when I use the study above the garage when nobody is in the living room), so I'm fine with that restriction. If you want more intelligent control, I would advice you to look into the Honeywell EVOhome system. Expensive, but i.m.o. the best solution for the combination of individual room control, OpenTherm and Domoticz.

Whatever you choose, don't foget that your boiler should always be able to pump around hot water, even when all valves are closed. You can leave open a small radiatior, e.g. the towel radiator in the bathroom, or you can install a bypass valve.
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Re: [120] opentherm gateway

Postby Pvhpsb » Saturday 02 July 2016 16:22

Hi,
I have running Domoticz on my Synology NAS works fine P1, RFX and Sun pannels
Now i connect a OTGW with a Esp wireless lan
I can see OTGW data in the log file, but no devices are available.
With the OTmonitor can i see al the data
Can someone help me?
Patrick

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Re: RE: Re: [120] opentherm gateway

Postby jake » Saturday 02 July 2016 17:05

Pvhpsb wrote:Hi,
I can see OTGW data in the log file, but no devices are available.
With the OTmonitor can i see al the data
Can someone help me?
Patrick


Did you allow domoticz to add new devices?

Pvhpsb
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Re: [120] opentherm gateway

Postby Pvhpsb » Saturday 02 July 2016 20:27

Yes i did.
MVG

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Re: [120] opentherm gateway

Postby jake » Saturday 02 July 2016 23:51

In the OT-monitor or Domoticz hardware section you can type a direct OpenTherm command. I am fairly new to this all myself, but found out that as soon as you type PS=0, OT-monitor can read the data, but that Domoticz overrides it all the time with PS=1. It may help when you jumpstart the process by doing the PS=1
(PS: when I want OT-monitor to read the data, I need to disable the OTGW in Domoticz hardware, because Domoticz overrides the PS=0 every few seconds with PS=1. I have no clue why Domoticz does that, it is obviously needed for correct functioning in their software.

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Re: [120] opentherm gateway

Postby manjh » Monday 24 October 2016 12:07

I use the iSense thermostat, and frequently use the vacation program when I am away from home for a while.
But if I decide to come home early, is there a way to cancel the vacation program using the OTGW?
If I send a command TT=0, how will the iSense interpret that?
Hans

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Re: [120] opentherm gateway

Postby Duci » Saturday 26 November 2016 16:27

Pvhpsb wrote:Hi,
I have running Domoticz on my Synology NAS works fine P1, RFX and Sun pannels
Now i connect a OTGW with a Esp wireless lan
I can see OTGW data in the log file, but no devices are available.
With the OTmonitor can i see al the data
Can someone help me?
Patrick

I have exactly this problem, except I am not on NAS but on Rpi.

-cut-

Opened topic for it. https://www.domoticz.com/forum/viewtopic.php?f=26&t=14542&p=106204#p106204Hoping to find solution so that others will be able to find the solution easily as well. :)

-edit2: solution found. Is in above topic!

manjh
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Re: [120] opentherm gateway

Postby manjh » Monday 05 December 2016 19:29

manjh wrote:I use the iSense thermostat, and frequently use the vacation program when I am away from home for a while.
But if I decide to come home early, is there a way to cancel the vacation program using the OTGW?
If I send a command TT=0, how will the iSense interpret that?

Anyone?
Hans

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Re: [120] opentherm gateway

Postby lrybak » Friday 09 December 2016 13:38

Hi,Sorry for maybe dumb question. Is opentherm gateway compatible with any boiler with the eBUS terminal?
I own Vaillant atmoTEC plus but cannot find anywhere is it opentherm compatible or not. It has eBUS +/- terminal but have no idea is usable at all.

Thanks for any hint
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Derik
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Re: [120] opentherm gateway

Postby Derik » Friday 09 December 2016 13:42

does your Valliant have the opentherm module on board?
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Re: [120] opentherm gateway

Postby rjblake » Sunday 11 December 2016 15:10

lrybak wrote:Hi,Sorry for maybe dumb question. Is opentherm gateway compatible with any boiler with the eBUS terminal?
I own Vaillant atmoTEC plus but cannot find anywhere is it opentherm compatible or not. It has eBUS +/- terminal but have no idea is usable at all.

Thanks for any hint


From all I know about the eBus, it is not interchangeable/same as Opentherm. Vaillant sell a separate board for Opentherm communications that connects to the eBus, but it is not compatible with all models they produce. Suggest contacting them to find out if they have one that is compatible.

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Derik
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Re: [120] opentherm gateway

Postby Derik » Sunday 11 December 2016 16:43

mmm

And my OTGW does send me cray..error 03....
Everytime..
What settings i try in the OTGW ..
1 hour and: error 03.. :x

grrrrrr
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Re: [120] opentherm gateway

Postby rjblake » Sunday 11 December 2016 23:32

Derik wrote:mmm

And my OTGW does send me cray..error 03....
Everytime..
What settings i try in the OTGW ..
1 hour and: error 03.. :x

grrrrrr


Tried increasing your reference voltage? I was getting them on a reasonably regular basis but increased to X=4 and not had one since. From the troubleshooting:

If you see nothing, or things like "Error 01" or "Error 03", the reference voltage may be wrong. You can modify it via Options → Settings (F5) or with the VR=X command. where X is a number between 0 and 9. The normal value is 1.250V (X=3), but due to variations in the used components you may have to change it. If you find you need a value less than 1.042V (X<2) or more than 1.667V (X>5), check that R5 and R6 have the right values. Don't forget to click the Set button after every adjustment to actually make the change in the gateway.

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Derik
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Re: [120] opentherm gateway

Postby Derik » Monday 12 December 2016 0:25

I did try try the VR=4, 5, 6, and 3. [ 3 is the standard i mean? ]

Only every-time i get the error 3...

Is there a way to use.
First the otgw power up then the usb and reboot the pi?
Or first usb power off rpi and then all reboot.
or???


Try tomorrow next time..
Only yours Stable?
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Re: [120] opentherm gateway

Postby rjblake » Monday 12 December 2016 10:51

Derik wrote:I did try try the VR=4, 5, 6, and 3. [ 3 is the standard i mean? ]

Only every-time i get the error 3...

Is there a way to use.
First the otgw power up then the usb and reboot the pi?
Or first usb power off rpi and then all reboot.
or???


Try tomorrow next time..
Only yours Stable?


Did you check the values of the R5 & R6 resistors? They should be 33 kΩ and 4.7 kΩ respectively. If not, probably good to get them within limits to start. You also mentioned that you tried increasing the voltage, but not decreasing [X=2, or X=1]. I trust you sent the command as X=4 etc. and not VR=4 etc. as in your reply?

I am using an ESP8266 WiFi module and not a USB connection. I simply powered on the OTGW and after a few seconds reset the OTGW (short the RST pins for 1 second, or send a reset to the gateway (serial command "GW=R") initially. All my measurements were largely within specification (some slight variations on the resistor values, but not outside of the 5% tolerance). I did get a number of "Error 03" messages (around 3 or so per hour) initially, but after increasing the reference voltage to X=4 they stopped completely.

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Derik
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Re: [120] opentherm gateway

Postby Derik » Tuesday 20 December 2016 23:32

Did try your command:
6-12-20 22:31:24.890 (D.M.: RFXcomE) Temp + Humidity (Waterbed)
2016-12-20 22:31:24.921 (X: D.M.: ESP-1xx) General/Custom Sensor (Ram: Leds Control)
2016-12-20 22:31:25.317 OTGW: Error 03
2016-12-20 22:31:26.273 OTGW: Error 03
2016-12-20 22:31:26.365 OTGW: Invalid user command!: X=4
2016-12-20 22:31:27.212 OTGW: Error 03


Invalid...
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Re: [120] opentherm gateway

Postby rjblake » Sunday 01 January 2017 22:37

Sorry - I must have been tired when I wrote the previous reply - command is indeed "VR=x", where x=0,1,2,3,4,5,6,7,8,9. If it doesn't work with any of these (try them all), I'd start with testing all the resistor values with the OTGW disconnected as per the Troubleshooting http://otgw.tclcode.com/debugging.html. I suspect there is a resistor (R5 or R6) that is not quite right, or a short/dry connection on PCB


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