I have recently a dumb ap connected by cable to the main router whit DHCP server active, but when I try to enter through the static ip configured in the main router 192.168.1.3 it simply does not enter to interface luci.
the thing its that i what to program operating hours in the dumb ap, for example: from 8am to 9pm every day
Just install luci-app-wifischedule. If you want to do it oldschool and have simple needs you could use cron also:
crontab -e
0 24 * * * /sbin/wifi down
0 08 * * * /sbin/wifi restart
ok and how can i use that? where can put that?
ok thanks im gonna to look for it 
have you could know why i cannot enter to the openwrt thourgth 192.168.1.3 the static ip from the main router?
Did you missed the step to disable the firewall (on the dumb ap ofc)?
Either web interface is not working for some reason, or the device has another IP.
Try to log in using command-line interface:
https://openwrt.org/docs/guide-quick-start/sshadministration
It is not a dumb AP if the DHCP server is active, and a source of issues if ithe nterfaces are bridged. You probably configured as a router, and now you are trying to entre through the WAN port, which is closed unless you opened it explicitly.
mmm it posible because i never read something about the firewall
ok aim gonna readi it thamnks
no the dhc it active in the main router whitch have an static ip to the openwrt dumb ap, and its conected througth the lan port
Follow this guide to configure your device properly:
wow thanks thats what i was looking for..
i whish that i can understand it
Well, to understand this you need at least knowledge about OpenWrt itself and networking in general.
Ofc not all and not very deep like burned into your brain. If you follow the guide I've linked you basically just have to edit some files and execute some commands on command line using a SSH connection.
oh thanks gonna read it to!