root@OpenWrt:~# cat /etc/config/wireless
config wifi-device  wifi0
        option type     atheros
        option channel  11
        option mode 11g

config wifi-iface
        option device   wifi0
        option network  lan
        option mode     ap
        option ssid     OpenWrt
        option hidden   0
        option encryption none

root@OpenWrt:~# iwconfig ath0
ath0      IEEE 802.11g  ESSID:"OpenWrt-2"  Nickname:""
          Mode:Master  Frequency:2.462 GHz  Access Point: 00:02:8A:FE:77:1E
          Bit Rate:0 kb/s   Tx-Power:17 dBm   Sensitivity=0/3
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/94  Signal level=-95 dBm  Noise level=-95 dBm
          Rx invalid nwid:569  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

....

root@OpenWrt:~# cat /etc/config/wireless
config wifi-device  wifi0
        option type     atheros
        option channel  11
        option mode 11b

config wifi-iface
        option device   wifi0
        option network  lan
        option mode     ap
        option ssid     OpenWrt
        option hidden   0
        option encryption none

root@OpenWrt:~# wifi
ath1      IEEE 802.11b  ESSID:"OpenWrt"  Nickname:""
          Mode:Master  Frequency:2.462 GHz  Access Point: 00:02:8A:FE:77:1E
          Bit Rate:0 kb/s   Tx-Power:17 dBm   Sensitivity=0/3
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/94  Signal level=-95 dBm  Noise level=-95 dBm
          Rx invalid nwid:164  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0