RUI APOLLO3 SDK

This repo's aim is to add armgcc supoort to RAKWireless Arduino SDK. You can download submodules via following command:

git submodule update --init --recursive

To compile example project at app folder, firstly, TOOLCHAIN and SDK_ROOT variables must be set according to your operating system. TOOLCHAIN is arm-none-eabi-gcc address and SDK_ROOT is 'RAK-APOLLO3-SDK' repo address.