Connectivity is handled over Bluetooth Low Energy. This features an NRF52832 microcontroller, as well as an IPS display, some Flash storage, and a vibration motor. After purchasing a wide variety of fitness trackers online, he eventually came across his favored unit, the Tracker I6HRC by IWOWNFIT. The first part of ’s work consisted of research and disassembly. That’s precisely what has done, by reverse engineering and developing custom firmware for cheap fitness trackers (Google Translate). There’s a way around that, of course – leveraging an existing platform where someone else has already done the work. While many of us are experienced at designing PCBs and soldering up arcane gadgets, interfacing with the soft and fleshy human form can present unforeseen difficulties. The concept of wearable hardware is an enticing one, but it can be difficult to tackle for the first-time maker.
