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Thanks for the update Schelte :) When I connect the gateway to the computer, the control setpoint starts at 90 degrees. Then I set the values for the DHW setpoint and the CH water setpoint to 65 and 70 degrees respectively. Then the control setpoint gets down in steps to 70 degrees. Then, when I dis...

I want to change the default values for 'maximum central heating setpoint' and 'domestic hot water setpoint' in the firmware. I want to change this because when I disconnect the gateway from my computer, the thermostat shows the default values which are programmed in the firmware of the PIC16F88 aga...

I’m afraid boiler isn't able to provide this information. I did sent an AA=28 code (in gateway mode) and still I can’t get any return water information from the boiler (OTmonitor gives ???). I'll not be able to modify the firmware so that’s not an option for me :( So if I understand it right, when a...

I’ve an Intergas Kombi Kompakt 28 boiler and it doesn’t report the CH return water temperature in Otmonitor. Since the CH boiler water temperature and the return water temperature are the most important things to monitor for me at this moment, I thought of using the outside temperature function of O...

Works like a charm now! (see picture). https://www.dropbox.com/s/fj1e978qjf2czsp/OTGW-%283%29.jpg?dl=0 or link: https://www.dropbox.com/s/fj1e978qjf2czsp/OTGW-%283%29.jpg?dl=0 OpenTherm Gateway V4.2.1 14:41:00.114362 BC000030A Read-Ack Status: 00000011 00001010 14:41:00.519982 T10013300 Write-Data C...

Thanks for your answer Schelte.

If I can help you out by sending a log file please let me know.

I finally found the time to reconnected the gateway to the CH system and when the boiler temperature in the graph dropped to zero again I looked at the log file and found the following data: 13:56:16.905251 T10013900 Write-Data Control setpoint: 57.00 13:56:17.045587 BD0013900 Write-Ack Control setp...

Thank you Schelte for your reply. I did look at the log but I didn't yet know where to look for
I'll try that as soon as I'll be home.

Hi all, I ordered the Opentherm gateway as a kit. After assembling the kit I measured al voltages and currents and everything seems to be OK. I loaded firmare v4.2 to the PIC. Then I connected the OTGW to my Honeywell Chronotherm Vision Modulation thermostat and to my Intergas Kombi Kompakt HR 28/24...