Once the OpenWrt OS is installed on RB, all that remains in order to get the RB working as a Wireless AP is configuration of its network and wireless parameters. This is done using two files /etc/config/network and /etc/config/wireless
Disable DHCP ServerOpenWrt, by default, leases DHCP on its LAN interface. First and foremost, we need to disable this: File: /etc/config/dhcp
Add "option ignore 1" at the end of "config dhcp lan" section.
...
config dhcp lan                                           
        option interface        lan                       
        option start    100                               
        option limit    150                   
        option leasetime        12h           
        option ignore 1 
...
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