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Thank you very much Schelte! The msg you reported has made the difference. Now the boiler replies to my request with WRITE-ACK, READ-ACK or UNKNOWN-DATAID; instead of DATA-INVALID: TX: 0x90020130 RX: 0x50020130 (WRITE-ACK) TX: 0x00000000 RX: 0x40000002 (READ-ACK) TX: 0x00030000 RX: 0xc0030102 (READ-...

Thank you very much,
I will try asap.
Michele.

Nobody has contacts with the owners of ATAG boilers?
I found someone inside old forum posts, but they are not visiting it anymore and neither replied to my direct mails.
Thanks to everyone who can help me,
Michele.

Dear all, I am looking for someone who has an otlog of the first messages exchanged between thermostat and ATAG boiler. I have an ATAG boiler model Q15S, which supports z-ready protocol (opentherm by ATAG) but it is not present inside the compatibility matrix (http://otgw.tclcode.com/matrix.cgi#boil...

I have just changed the control board with a newer one.
After changing the parameter 60 to 2 now I see 18.54V on the terminals, now I can go with my project.
Thank you very much.
m.

Thank you very much for your reply.
I checked my user manual and the parameter 60 is not present, my model could be too old (2007).
I will ask to ATAG dealer if it is only a metter of FW upgrade instead of a newer control board (with different HW).

m.

I am new to the forum and I am approaching for the first time OpenTherm interface. I have an ATAG Q15S boiler which at the moment doesn't have a dedicated controller (on/off room thermostat are controlling only floor valves). I'd like to add an OTGW to control the boiler, but before buying I want to...