# enable and disable SSID: Guest | Mode: Master | BSSID: FE:F2:6D:37:BC:A8 | Encryption: None
0 8 * * * uci set wireless.@wifi-iface[4].disabled=0; uci commit
0 47 * * * uci set wireless.@wifi-iface[4].disabled=1; uci commit

to show all radios:

uci show wireless

cron tasks:

/etc/init.d/cron enable
/etc/init.d/cron start
/etc/init.d/cron restart

https://forum.openwrt.org/t/scheduling-on-off-wifi/3385/6

https://openwrt.org/docs/guide-user/base-system/cron