I am a newbie, I've tried openwrt tplink Mr3020 and the results are going well, but I did stop on the lan interface, and now I can not connect with tplink MR3020, so how I can connect back with tplink mr3020? please help
Not sure if you mean it's on another IP address or you've bricked it by disabling the LAN interface so here's both solutions.
If it's Technobit's firmware and assuming DHCP is off you should find it on 192.168.0.99 Set you computer wired network interface IP to 192.168.0.100 attach network cable and type 192.168.0.99 into a web browser to see it.