As Android developers, we’re able to easily create applications for wearable devices such as Android Wear and Google Glass. But, what happens when we need to create an app or custom device simply to get data or functionality that a phone, tablet, or smartwatch doesn’t provide? Prototyping such types of wearable devices used to be something that required specialized skills in embedded development as well as electrical and mechanical engineering. Today, thanks to the maker revolution, we can combine our programming knowledge with basic electronics, soldering skills, and access to a 3-D printer in order to create useful devices. More importantly, there are now boards available that allow developers to interact with them without having to create custom Bluetooth drivers or write C++ firmware.