Opentherm gateway and script integration into Homeseer

[fabian]

nice project Fabian!

It sure is, thanks to http://tclcode.com/opentherm/ and blb for the HS scripts.

My Intergas boiler is causing me headaches too. Its OpenTherm implementaion differs a bit from Remeha's which seems to be causing errors in the gateway while the burner or pump is running.

hs_ot.gif (71.78 KiB) Viewed 14455 times

Is it possible to create a virtual device with a range of possible values 10 , 10.5 , 11 , 11.5 .... 25 ?

[blb]

fabian,

thanks for providing the icons. If you have the outside temperature available via the Gateway as well you'll need also the icons for negative values (-1.gif etc)

[fabian]

min.zip

(34.21 KiB) Downloaded 544 times

Negative icons from -1 to -99.

[Tozz]

I managed to get my OpenTherm gateway working today, with the PCB from Fabian. I couldn't get the temperature to change. It turned out that caused because I used the 'TELE' input on my Honeywell Chronoterm Vision. The TELE-input is disabled by default, but I used it to turn off the HVAC when my alarm was armed.

It seems most 'advanced' thermostats support some sort of external input (Honeywell Chrono Vision, Remeha iSENSE), so if you can't get it to work this could be the cause

[phoenixb]

Hi
Next week i will try to made this solution working with a Remeha Avanta CW4 so i can disconnect the RJ11 service monitor (TTL to ethernet) from the main PCB and can made a connection with the Opentherm monitor (With all thanks to Fabian to made this possible )
Grtz,

[Fischi]

Hi, Fabiann,
I'm very interested in your gateway.
Where can I get a complete module ??

Regards,
Fischi

[phoenixb]

Hi,

At this moment i'm connect the pcb to the opentherm line and made a RS232-ethernet connetion to the Homeseer pc.
This part is working ok, but i have 1 function that i not can find.

On this site -> tclcode.com there was talk about a option to send the outdoor temp to the opentherm line.
How can i made this part in HS? because i have now a really big Remeha gateway hanging on the wall that i want to disconnect .

I like to hear it.
Regards,

[fabian]

On this site -> tclcode.com there was talk about a option to send the outdoor temp to the opentherm line.
How can i made this part in HS? because i have now a really big Remeha gateway hanging on the wall that i want to disconnect .

If you have an outside temp sensor value in HS, you can send it to the gateway with blb's script.
BLB_OT_monitor_02.vb("Main","OT=")

[fabian]

Hi, Fabiann,
I'm very interested in your gateway.
Where can I get a complete module ??

Regards,
Fischi

Well, it's not 'my' gateway but there's no ready to use module available. You can build it yourselve with the information provided by http://tclcode.com/opentherm/

[phoenixb]

@ fabian, thanks for the info.
First i have to solve a little problem that i can not made any connection to the monitor and the boiler is going to max. capacity so i can not try it.
But when it's back online i will insert the script.

Thanks.
Regards,

[fabian]

I've just moved homeseer to a new Windows XP VM which is running on Linux/KVM (libvirt/qemu). To remove any delay caused by the Portserver TS (Serial / IP) i've connected serveral USB to Serial cables to my linux box and forwarded /dev/ttyUSB* to WindowsXP.

All seems to work properly except for the blb opentherm gateway script.

Code: Select all

13-8-2012 18:50:00  - debugOTc - OTCommand: PS OTValue: 1
13-8-2012 18:50:00  - debugOTc - opening COM1 port succesful
13-8-2012 18:50:01  - debugOTm - Response from Serial Port: PF00000010/00000000,SE10.00,00000000/00000000,100.00,0/0,17.00,0.00,0.00,22.79,28.00,0.00,0.00,0.00,0/0,0/0,0.00,0.00,11707,0,0,0,860,0,0,111
13-8-2012 18:50:01  - debugOTm - Reply: 00000010/00000000,SE10.00,00000000/00000000,100.00,0/0,17.00,0.00,0.00,22.79,28.00,0.00,0.00,0.00,0/0,0/0,0.00,0.00,11707,0,0,0,860,0,0,111
13-8-2012 18:50:01  - OTmonitor error - communication: Conversion from string "SE10,00" to type 'Double' is not valid.
13-8-2012 18:50:25  - debugOTc - OTCommand: PS OTValue: 1
13-8-2012 18:50:25  - debugOTc - opening COM1 port succesful
13-8-2012 18:50:26  - debugOTm - Response from Serial Port: PF00000010/00000000,SE10.00,00000000/00000000,100.00,0/0,17.00,0.00,0.00,22.79,28.00,0.00,0.00,0.00,0/0,0/0,0.00,0.00,11707,0,0,0,860,0,0,111
13-8-2012 18:50:26  - debugOTm - Reply: 00000010/00000000,SE10.00,00000000/00000000,100.00,0/0,17.00,0.00,0.00,22.79,28.00,0.00,0.00,0.00,0/0,0/0,0.00,0.00,11707,0,0,0,860,0,0,111
13-8-2012 18:50:26  - OTmonitor error - communication: Conversion from string "SE10,00" to type 'Double' is not valid.

It seemd multiple carrier returns or linefeeds where send. I'm not sure if this is due to a specific .net/vb/windows sp/other software change or due to all serial connections being forwarded to linux.

PS=1 + 2x CR with precise timing caused a 'SE' in the summary line.

After replacing all (4x) vbCrLf with vbCr things started working again. I do know the difference between a CR and LF but as i'm not a coder/scripter, i'm not sure why this change was needed and if it will have any other consequences

[Ricardo]

Hallo.

Ik ben van plan om ook deze gateway te gaan maken. Is er iemand die nog een PCB over heeft ?

[spierie]

Ik heb ook interesse in een PCB, zijn de Eagle files eventueel beschikbaar.?
Dan kunnen we er een paar laten maken.

[Digit]

Kijk even hier bijvoorbeeld..
http://www.domoticaforum.eu/viewtopic.php?f=15&t=7848
Er zijn al diverse acties geweest.

En op de website van de Opentherm Gateway staat alles haarfijn uitgelegd.

[Michelo]

Hi Bernard. Great script! No problems so far. I am using it with a Remeha Calenta with iSense. Only thing that I noticed with the thermostat is that I must do a "TC=0" before I can change the setpoint of the thermostat. But only if the thermostat is already in remote override mode.