I understood. Settings could change in "/overlay/upper/".
I change setting for wireless
"
root@Rambutan:/# cat /overlay/upper/etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'platform/qca955x_wmac'
option htmode 'HT20'
option disabled '0'
config wifi-iface
option device 'radio0'
option network 'lan'
option mode 'ap'
option encryption 'none'
option ssid 'Rambutan'
"
but wi-fi as before do`t visible.
Yes, i made reboot device
.
What am i missing?