OpenWRT: STA+AP on TP-Link TL-WR703N. Network configuration for OpenWRT that enables two VAPs, one as a client (STA) for uplink (wan interface) and another as an access point bridged with eth0 (lan bridge). NAT is already provided. TL-WR703N has Atheros AR9331 wireless with one antenna and no network switch.

:etc:config:network

config interface 'loopback'
        option ifname 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fdxx:xxxx:xxxx::/48'

config interface 'lan'
        option ifname 'eth0'
        option type 'bridge'
        option proto 'static'
        option ipaddr '192.168.1.1'
        option netmask '255.255.255.0'
        option ip6assign '60'

config interface 'wan'
        option proto 'dhcp'

:etc:config:wireless

config wifi-device  radio0
        option type     mac80211
        option channel  11
        option hwmode   11ng
        option path     'platform/ar933x_wmac'
        option htmode   HT20
        list ht_capab   SHORT-GI-20
        list ht_capab   SHORT-GI-40
        list ht_capab   RX-STBC1
        list ht_capab   DSSS_CCK-40
        #option disabled 1

config wifi-iface
        option device   radio0
        option network  lan
        option mode     ap
        option ssid     PocketNet
        option key      'password'
        option encryption psk2

config wifi-iface
        option device   radio0
        option network  wan
        option mode     sta
        option ssid     Upstream
        option key      'password'
        option encryption psk2

Hello! It's awesome that I've found this, for some reason I can't do this using similar configuration - will try this one. Could you post your resulting interface names? My board assigns them as wlan0 and wlan0.1, which is kinda confusing.
Also, the configuration doesn't work for some weird reason. Bummer. Will need to research my board more, or maybe flash another version of OpenWRT.