DD trunk for Archer C7 only have 1 band for wifi
config wifi-device radio0
option type mac80211
option channel 11
option hwmode 11g
option path 'platform/qca955x_wmac'
option htmode HT20
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
config wifi-iface
option device radio0
option network lan
option mode ap
option ssid OpenWrt
option encryption none
but CC still has both 2
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'pci0000:01/0000:01:00.0'
option htmode 'VHT80'
config wifi-iface
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'OpenWrt'
option encryption 'none'
config wifi-device 'radio1'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'platform/qca955x_wmac'
option htmode 'HT20'
config wifi-iface
option device 'radio1'
option network 'lan'
option mode 'ap'
option ssid 'OpenWrt'
option encryption 'none'