[werk_ag]

I came out with an old FONERA that is a sharing router, it works very well.
My router may be capricious.

ESP8266 modules are also capricious with some routers. That is a well know fact, described in many forums.
I have 4 routers at home, the ESP8266 modules work perfectly with three of them (DrayTek, GygaByte, Fonera), but I never managed to make them work reliably with a D-Link G604T

Fonera is a very good router for this kind of things!