Hello
I have a similar problem (hardware : Arduino, sensor, ESP8266)
when I use my 'box' as the wifi access point, everything is OK
but when I use my smartphone as an access point, I get the >, send the GET request, get a SEND OK but data do not appear on my channel
when I connect my laptop via the smartphone, updating data in the web browser DO work, though...
did someone experiment the same problem ? did someone solve it ??