I hope you are right Andrzej Konopacki and this is because of New Year and holidays. Seems that will be the best to flash the devices and have the own server :)
Will see. Have been back online yesterday, but today again offline from morning. Not promising for now...
Thanks for you answer. Unfortunately it does not work. Where and how do I delete the device?
Purtroppo l'accoppiamento dei sonoff è un tasto dolente. In alcuni casi ho perso parecchie ore per questa operazione. Pur seguendo tutti i suggerimenti da parte di ITEAD molte volte il problema restava. Ci vuole molta pazienza
It's amazing that they do not solve this problem.
I have another sonoff running for months correctly, now I have bought a new one, but, in the ewelink app, it always appears as "offline", while the other sonoff works correctly.
I can ping eu-disp.coolkit.cc without problems, I can connect to the new device sonoff from my phone's wifi, everything seems to be correct, but, the new device always appears as "offline" in my ewelink app and the device it is always with the double blinking that indicates that it does not connect to the server.
I registered an account just so I can help others on getting a Sonoff paired.
After trying for hours and using AP mode, pairing from fresh power up, trying to pair to WiFi without special characters in, pairing to a mobile phone hot spot, etc. etc. The ONLY thing that worked STRAIGHT away, was to put the phone into airplane mode, then only activating the wifi to connect with home router, then running the app to pair, and it works!!
The system of putting the phone in airplane mode also tried it and it did not work for me.