Newt Manager (newtmgr) is the application tool that enables a user to communicate with and manage remote devices running the Mynewt OS. It uses a connection profile to establish a connection with a device and sends command requests to the device. The newtmgr tool documentation can be found under /docs which are published at http:https://mynewt.apache.org/latest/os/modules/devmgmt/newtmgr.html

Build the newtmgr tool as follows:

1. Unpack newtmgr source.
2. Rename resulting apache-mynewt-newtmgr-1.9.0 directory to $GOPATH/src/mynewt.apache.org/newtmgr
3. cd $GOPATH/src/mynewt.apache.org/newtmgr/newtmgr
4. GO111MODULE=on go build