Are you want to DIY a router with openwrt. ar9531 chip support

IEEE802.11b/802.11g/802.11n ,IEEE802.3/802.3u WLAN Rate: 11n:802.11n HT20:max, 72.2Mbps@MCS7:1Nss
max, 144.4Mbps@MCS15:2Nss 802.11n HT40:max, 150Mbps@MCS7:1Nss
max, 300Mbps@MCS15:2Nss 11g:54,48,36,24,18,12,11,9,6,5.5,2,1Mbps 11b:11,5.5,2,1Mbps

pin define:

openwrt WEB interface: