Have VC templates installed in visual studio 2015 Make sure node v4 is running on RP To get the correct usb port, run ls /dev/tty* and see what is added when the rover is removed and added from the RP
Install typescript globally, npm install -g typescript --save-dev
To setup typescript and node, see http://brianflove.com/2016/03/29/typescript-express-node-js/ and http://ramachandrang.com/2016/04/23/express-angular2-application-using-typescript-server-setup.html
DC Motors have values in the range 255 to -255