config wifi-device wl0
option type broadcom
option channel 1
config wifi-iface
option device wl0
option mode adhoc
option ssid cast-mesh
option hidden 0
#option encryption none
option encryption wep
option bssid D2:A5:2D:BA:DC:A2
option key 6d6574616c6c69636131323334
but bssid isn't set, anyone have any idea?