Hello,
I have Urmet 1133 (noting after this number). The PCB is labeled CS1133-002B.
I have used the same setup and tried with 1144/20 configuration, and I have two issues:
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When I pick up the phone, I hear a constant high-pitched sound. This was not happening before the Nuki Opener installation.
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Opening the door works when I initiate it through the app. But the ring to open does not work and ringing the door is not recognized at any time.
Same issue as @inspyro. Peter, did you manage to solve your issue?