Instructions for [TP-Link TL-MR3020 v1](https://openwrt.org/toh/tp-link/tl-mr3020)

Based on [OpenWrt Hello World guide](https://openwrt.org/docs/guide-developer/helloworld/start)

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)
1. Unpack it to `~/openwrt-sdk`:
	```
	tar -xf lede-sdk-17.01.7-ar71xx-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64.tar.xz
	mv lede-sdk-17.01.7-ar71xx-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64 ~/openwrt-sdk
	```
1.