marco@marco-laptop:/tmp$ sudo iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:13:49:07:6E:A7
                    ESSID:"home"
                    Mode:Master
                    Channel:9
                    Frequency:2.452 GHz (Channel 9)
                    Quality=42/100  Signal level=-84 dBm  Noise level=-127 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Extra:tsf=00000099b515d612