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Your previous log was quite short. If you can collect a log that starts several minutes before a reset with a jump to 35 degrees, I'd be happy to take a look at it. But it looks to me like it's the thermostat that is doing this, so there may not be much to be gleaned from the log. It is also curious...

The TT and TC commands affect the thermostat, not the boiler/heat pump. They should work with all thermostats you mentioned. The TS command configures an attached temperature sensor. I'm unsure how that is related to your situation. The log you provided is not a normal OTGW log. It looks like it ma...

De OTGW heeft de mogelijkheid om een enkele temperatuursensor aan te sluiten. Maar op dit moment kan dat alleen worden gebruikt voor de buitentemperatuur of de retourtemperatuur. Bovendien is dat alleen nuttig als de thermostaat die informatie uitleest. Zo niet, dan verschijnt de gemeten waarde nooi...

Als het duidelijk is dat het aan die halve graden ligt, dan is het niet meer nodig om een logfile te maken.

Ik had verwacht dat TT het setpoint aanpast van de thermostaat en dat deze door de thermostaat pas weer wordt aangepast nadat de volgende fase van het ingestelde programma ingaat. Bij TC zal ik verwachten dat dit de thermostaat instelt op de 'continu modus', waarbij de ingestelde temperatuur vastho...

Most likely the Weheat works like an opentherm gateway itself. So it should be possible to connect the OTGW either between the boiler and the heatpump or between the thermostat and the heatpump. I don't expect there will be much difference in the messages on the two interfaces during normal operatio...

I must not understand what you are looking for. The tooltip uses the HTML title attribute, which has been around since the early days of HTML. It definitely works in both Firefox and Brave on linux. I just checked again: tooltip.png The Opentherm spec on Ihor Melnyk´s site contains a list of MsgIDs ...

Thermostat documentation can be less than clear about this functionality. But at least several Honeywell thermostats have some support for controlling DHW. There's a Round Modulation model that has a button to manually switch the DHW enable bit. Programmable Honeywell thermostats usually don't enabl...

Based on your description, I would have guessed that the gateway uses MsgID 99 for this. That ID can be used to set the DHW operating mode to Auto, Anti-legionella, Comfort, Reduced, Protection, or Off, if the boiler supports it. But looking at the equipment matrix, the Intergas Xtreme doesn't seem ...

With the right sketch on the Wemos, you can actually program the PIC without any additional hardware. This requires the V2.12 OTGW board and a PIC that was originally programmed with gateway firmware 6.6. I believe both are true in your case. On the V2.12 board there are two jumpers, marked LVP. You...

Ian. wrote: ↑Tue Feb 04, 2025 12:47 pm Is it worth reprogramming the chip or do you thing its hardware related.

Wait, does that imply that you have a PIC programmer? If so, it would be interesting to attempt to read the program from memory. That would confirm if the right program is loaded and that the PIC is functional.

All the readings in red are I/O ports. The values seem to indicate that the PIC is not running its regular program, which would configure those ports as outputs. The really strange one to me is pin #4. 3.92V is quite a bit higher than the 3.3V supply voltage. My first impression is that the PIC is e...

Ik zie die 0x00 versus 0x3F niet terug in jouw plaatje. Maar dat kunnen heel goed bits zijn van geleerde Unk data ID's of iets dergelijks. Ik heb voor die twee overbodige woorden in het linker script adres 0x3000 beschikbaar gesteld. Dus dat klopt precies met wat je ziet in je .BIN file. Het zou goe...

De firmware voor de PIC16F88 is in de loop der tijd dusdanig gegroeid dat het volledige flash geheugen nodig is om alles erin te kunnen proppen. Het probleem is alleen dat de linker nog 2 extra instructies toevoegt. Voor zover ik begrijp is dat nodig voor code die in C is geschreven. Maar dat is bij...

Correct. The 4k7 resistor is already provided on the circuit board. All you need to do is to make a connection on JP3 to attach the resistor to the 1-wire bus.