Research on Fitbit Flex
This document is a working document with information found from our own reverse engineering since 2014 and other information gathered on the web and mailing lists.
If you use information from this document, use it responsibly and at your own risk.
This document has been sent to Fitbit in November 2016, and they have not expressed any issue with its publication.Technical report on our research on the Fitbit Flex tracker.