i have 2 sonoff devices , a 4ch r2 and a mini diy . both devices were working great till last week and suddenly they went offline and their led's blink twice a second which means they can't reach to the server . I can only use them in lan mode . I have tried everything I found in forums and help center but didn't help . I also tried changing DNS address on router and tried to ping server addresses from my phone and PC to check if my network has access to servers which was ok . so now I'm hopeless and my hands are tight . I don't know what more I can do to get them back online .
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