Okay, I went into Recovery mode, and restored an older firmware.  That did the trick, Fibaro recognizes again and can initiate the online reset process of the HC3. Used file:  Please login or register to see this link.   Dont unzip the update.7z   thus in steps: - download the recovery firmware - start HC3 in recovery mode - use manual file to restore system (update.7z) - restart HC3 - re-run home.fibaro.com + transition of HC2 -> HC3 - login to y
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