Check-out

mkdir -p /embedded/openwrt/
cd /embedded/openwrt/
git clone git://git.openwrt.org/openwrt.git openwrt.git
chown -R nobody:nogroup /embedded/openwrt/openwrt.git
cd /embedded/openwrt/openwrt.git
/bin/su nobody
./scripts/feeds update -a

Configure

make menuconfig
 [Target System  = Atheros AR7xxx/AR9xxx]
 [Target Profile = TP-LINK TL-WR941N/ND]
 [Exit] [Yes]

Build

make V=s

Upgrade

ls -1 bin/ar71xx/*factory*
bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v2-squashfs-factory.bin
bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v3-squashfs-factory.bin
bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v4-squashfs-factory.bin
bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v5-squashfs-factory.bin
bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v6-cn-squashfs-factory.bin
scp bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v3-squashfs-factory.bin root@192.168.1.1:/tmp/
ssh root@192.168.1.1
cd /tmp
sysupgrade -v openwrt-ar71xx-generic-tl-wr941nd-v3-squashfs-factory.bin

</code>

OpenWRT
Specifications