http://linuxfr.org/news/nodemcu-esp8266-une-alternative-a-l-arduino

AT+CWMODE=1 : Passage en mode station

AT+CWLAP
busy p...
+CWLAP:(2,"WIFI1",-79,"12:12:12:12:12:12",1,-12,0)
+CWLAP:(0,"WIFI2",-77,"12:12:12:12:12:12",1,-12,0)
+CWLAP:(2,"WIFI3",-91,"12:12:12:12:12:12",7,-12,0)
+CWLAP:(0,"WIFI4",-89,"12:12:12:12:12:12",7,-12,0)
+CWLAP:(4,"WIFI5",-88,"12:12:12:12:12:12",7,23,0)
+CWLAP:(2,"WIFI6",-68,"12:12:12:12:12:12",11,1,0)
OK

AT+CWLAP
AT+CWJAP="MONWIFI","MONPASS"
WIFI CONNECTED
WIFI GOT IP
OK

AT+CIFSR
+CIFSR:STAIP,"192.168.0.1"
+CIFSR:STAMAC,"12:12:12:12:12:12"
OK

Ping