I have the same problem, all my sonoff devices are online except the TH16 which does not connect via the Zyxel VMG8825 router. If I use a Fritz 3272 router the TH16 connects to the server and works properly.
Hi All, after 2 months of using sonof products I am facing the same problem :( Does anybody got an answer from support guys?
Same problem here. After a few months my SonoffTH16 stopped answering to ping and now i can't get it into flash mode anymore.
PS i have another TH10 and no problems with that so far.
That means the TH16 is piece of shit?