Mynewt relies on two command line utilities (newt and newtmgr), both of which are described elsewhere in this learning guide, as well as the presence of an ARM cross-compiling toolchain (arm-none-eabi-gcc, etc.).

Both of these need to be installed and available on your system to work with Mynewt projects.

Cut auto-reset trace

Windows serial has a somewhat annoying thing it does where it toggles the DTR/RTS lines when you open a serial port. This will make debugging impossible since you keep resetting the board. Before you continue you must cut the trace-jumper on the bottom of the board:

Install newt & newtmgr Binaries

The official Mynewt documention for setting devices up on Windows is available here newt & newtmgr.

• Firstly you need to install MSYS2/MinGW and Git, Our guide on Mingw and git installation may be useful!
• Add a new user variable named MSYS2_PATH_TYPE and set the value to inherit in your Windows environment. This enables the MSYS2 and MinGW bash to inherit your Windows user Path values.
• Add the MinGW bin path to your Windows Path. For example: if you install MSYS2/MinGW in the C:\msys64 directory, add C:\msys64\usr\bin to your Windows Path. Note: If you are using Windows 10 WSL, ensure that you use the C:\msys64\usr\bin\base.exe and not the Windows 10 WSL bash.
• Download the latest newt & newtmgr binaries from http://www.apache.org/dyn/closer.lua/mynewt/ (click on suggested hosting mirrors), currently the latest version is apache-mynewt-1.5.0. You should now have both apache-mynewt-newt-bin-windows-1.5.0.tgz and apache-mynewt-newtmgr-bin-windows-1.5.0.tgz on your PC.
• Extract them and copy newt.exe and newtmgr.exe to your C:\msys64\usr\binand you are good to

You can test it by running newt and newtmgr from the shell

$ newt version
Apache Newt version: 1.5.0

$ newtmgr version
Apache Newtmgr 1.5.0

$ newt version
Apache Newt version: 1.5.0

$ newtmgr version
Apache Newtmgr 1.5.0

ARM Cross-Compiler

You will also need an cross-compiling toolchain for the ARM architecture, specifically GCC 4.9, since newt will call arm-none-eabi-gcc from the command line.

For details on installing this see the official Mynewt documentation here: https://mynewt.apache.org/latest/get_started/native_install/cross_tools.html