Reverse-engineering infrared-based electronic shelf labels
Summary
This article provides a detailed look at infrared-based ESL systems, covering infrastructure, the infrared PHY (PP4 and PP16), MAC framing, segment and image update commands, and hardware observations from teardown analyses. It also discusses brand variations and security implications, including the lack of encryption in some systems and potential update vectors, making it valuable for security-minded readers and hardware reverse-engineering enthusiasts interested in ESL technology.