OTGW stops when burner starts

This Forum is about the Opentherm gateway (OTGW) from Schelte

Moderator: hvxl

hvxl
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Re: OTGW stops when burner starts

Post by hvxl »

Fortunately that matches with what I see in the simulator when I simulate a rogue signal from the boiler. So my fix stands a chance of actually addressing your problem.
Schelte
thunderbird
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Re: OTGW stops when burner starts

Post by thunderbird »

Good News! The fix helps (as you expected). I see the Error 03 and after that some R messages only. During the first few seconds the message interval is not regular.

Overall it seems to be fixed! Many, many, many thanks! Are you going to 'officially' release this version?

Code: Select all

R10010A00
BD0010A00
Error 03
R00000000
R00000000
R00000000
BC0000000
R00110000
BC0110000
R001B0000
B601B0000
R801C0000
BC01C2F00

Code: Select all

R00000000
BC0000000
R80190000
B40194100
R10010A00
BD0010A00
R80380000
Error 03
R80380000
R80380000
R80380000
B40383C00
R00390000
B40393200
R00000000
BC0000000
R00000000
hvxl
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Re: OTGW stops when burner starts

Post by hvxl »

That's the original reason I made otmonitor. It reports timestamps for each message, so you can see if the message interval is not regular and which side is causing that. With your logs there's no way to tell.

It looks like your boiler goes off its rocker for a short while at the end of its ventilation cycle.

Now I have your confirmation that it works, I will officially release this firmware.
Schelte
Astroturf
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Re: OTGW stops when burner starts

Post by Astroturf »

Hello Schelte,

Would it be possible to release the source for 4.2.6?
I'm using a patched 4.2.5 (patch to use the DS18B20 sensor for RWT).

Thank you.
hvxl
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Re: OTGW stops when burner starts

Post by hvxl »

Unless you have the same problem as thunderbird, you can just keep on using 4.2.5. I expect there is a version 4.3 to come. I will post the sources again with that release.
Schelte
thunderbird
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Re: OTGW stops when burner starts

Post by thunderbird »

Hi, I just installed 5.1 and it seems that this problem (crashing OTGW when burner starts) is back in town. I did not go deep to check if the problem is exactly the same, but it seems so.

Do you know if the patch of 4.2.6 is also in 5.1 (or not)?
hvxl
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Re: OTGW stops when burner starts

Post by hvxl »

Of course I didn't take the fix out again. That would be silly.

Reproducing the problematic signal from the boiler in the simulator with firmware 5.1 also gives the expected result: Just an "Error 03" report and the OTGW keeps on running fine.
Schelte
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