Instructions for [TP-Link TL-MR3020 v1](https://openwrt.org/toh/tp-link/tl-mr3020)
1. Use Linux host
1. Download the last supported [SDK 17.01.7](https://downloads.openwrt.org/releases/17.01.7/targets/ar71xx/generic/lede-sdk-17.01.7-ar71xx-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64.tar.xz)