Hello thank you for your quick answer, I have done the command uci show wireless, and I have this result below, is that wifi1 is my 5ghz AP name ?
wireless.radio0=wifi-device
wireless.radio0.type='mac80211'
wireless.radio0.hwmode='11g'
wireless.radio0.path='platform/soc/a000000.wifi'
wireless.radio0.htmode='HT20'
wireless.radio0.country='US'
wireless.radio0.channel='11'
wireless.radio1=wifi-device
wireless.radio1.type='mac80211'
wireless.radio1.channel='36'
wireless.radio1.hwmode='11a'
wireless.radio1.path='platform/soc/a800000.wifi'
wireless.radio1.htmode='VHT80'
wireless.radio1.country='US'
wireless.default_radio1=wifi-iface
wireless.default_radio1.device='radio1'
wireless.default_radio1.mode='ap'
wireless.default_radio1.wifi_id='wifi1'
wireless.default_radio1.encryption='psk2+tkip+ccmp'
wireless.default_radio1.ssid='Wifi_5G'
wireless.default_radio1.key='12345678'
wireless.default_radio1.network='lan'
wireless.@wifi-iface[1]=wifi-iface
wireless.@wifi-iface[1].encryption='psk2'
wireless.@wifi-iface[1].device='radio0'
wireless.@wifi-iface[1].mode='ap'
wireless.@wifi-iface[1].key='12345678'
wireless.@wifi-iface[1].ssid='Wifi_2G'
wireless.@wifi-iface[1].network='lan'
wireless.@wifi-iface[1].wifi_id='wifi0'