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Hello hvxl, You are indeed right. I haven't read the instructions good enough. Thanks for pointing it out. May be you can emphasize to not place IC1to prevent others as dumb as me making the same mistake... Rerun of the tests: Test #5: 17,03 V (still ok) Test #6: (IC1 Pin 2 = Vdd): 6,14 V (is ok now...

Hello hvxl, The measurements are done with all components placed. Tests #1 till #4 should indeed have been performed without IC1 and OC1. But, according to the troubleshooting page ( http://otgw.tclcode.com/debugging.html#interface ), tests #5 and further, which went wrong, should be done with IC1 a...

Hello hvxl, Thank you for your reply! And my apologies for my late reply. I assumed I would receive an email if someone posted an answer... I have checked the zenerdiodes but they are placed correctly. The "fat" one (BZX85C) is D10. The 4V3 version is D11. I needed a loupe the distinguish ...

Hi, Today I assembled the OTGW and finished the diagnostics part to be sure everything is correct. But I think there is something wrong... The measurements (no boiler or thermostat is connected. Also USB is not connected): Test #1: Voltage between pins 5 and 14 IC1: 5,06 V Test #2: Voltage on X1: 23...