In my case when try to connect to my router appears:
AT+CWJAP="myssid","mypassword"
WIFI CONNECTED
+CWJAP:1
FAIL
WIFI DISCONNECT
Just ESP8266 arrive home with DHCP disabled, it needs to be enabled
just try:
AT+CWDHCP=1,1
In order to enable DHCP for STA, it returns:
OK
WIFI GOT IP
