ESP8266 Community Forum

I 've made an ESP8266 device(a thermometer).
Uses WiFiManager library.
It works fine with my router.

BUT, at the client, I do everything as expected (turn to Access Point, Enter credentials, save, reboot ESP) but does not send data to thingspeak.
Like if it cannot connect to the internet.
(the password is 100% correct)

My client's router is a 'Thomson' brand name router.
Does ESP face any problems connecting to some specific routers?
What can I do?
Any help is welcome.

Does your device show up in the router control panel?

When in Access Point mode, it shows up in the list of available Wireless networks.
When in normal mode, it doesn't show up in this list.
(I guess because this happens very quickly: connects to thingspeak, sends it's data, and disconnects)

(in the router control panel I think it does not show up at all)

I would write some simple code or use an example to make sure it appears in the router connected items list. At least you could then check one possible problem off your list.