Metawear is a small, lightweight piece of hardware with Bluetooth low energy and multiple onboard sensors like an accelerometer, gyroscope, light sensor, and temperature sensor. It has GPIO pins and does not require firmware development. Android and iOS libraries are available to access Metawear's sensors without needing Bluetooth or hardware experience. While developing apps for Metawear, the main difficulties were a lack of clear documentation for its Bluetooth services and characteristics as well as commands structure. These issues were solved by adding logs to trace Bluetooth commands, implementing a request queue, adding timeouts, and repeatedly testing a sample app.