The DFRobotShop Rover was originally designed to be one of the least expensive (and also one of the first) Arduino-based mobile robots on the market, and has proven to be quite a success. There have been various iterations including an omniwheel variation, as well as a Mecanum design. There are also a number of accessories like an expansion plate, encoders, sensor mount and more. This post is actually to emphasize that not all robotic endeavors end up successful, and to highlight the lessons learned. This was done back around 2013 and was more of a "fun" project.
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/dfrobotshop-rover-4wd