The easiest way to install the packages is to add the repository provided in the list below to /etc/opkg.conf

Buffalo
Device Packages Repository Status Comment
WZR-HP-G300NH http://openwrt.mysmartgrid.de/ar71xx/packages/ http://openwrt.mysmartgrid.de/ar71xx/packages/Packages.gz untested DD-WRT by Buffalo does not allow to install packages
TP-Link
Device Packages Repository Status Comment
TL-MR3220 http://openwrt.mysmartgrid.de/ar71xx/packages/ http://openwrt.mysmartgrid.de/ar71xx/packages/Packages.gz working