In May last year we wrote a blog post on our initial research on Bluetooth Low Energy (BLE). This covered our research into the new protocol, including what devices were using it, how it works, and how to collect data. The main point of our original work was that BLE devices can often be trivially detected and identified, affecting the privacy of their owners.
At the time we also released a free Android application, called RaMBLE, to help people see what BLE devices are out there. It's been a year since then, and the blog's original authors Scott Lester and Paul Stone from our Research team thought it was about time to take another look at these increasingly popular devices and the data from RaMBLE.