3.- Playing with AT commands from Serial Monitor.
AT+CIOBAUD=? AT+CIOBAUD? AT+CIOBAUD=9600 AT+GMR AT+CWMODE? AT+CWMODE=3 AT+CWLAP AT+CWJAP="MIROUTER","micontraseña" AT+CWJAP? AT+CIFSR AT+CIPSERVER=1,80