The Evolution of USB On-The-Go: From Chaos to Elegance

This article traces the evolution of USB On-The-Go (OTG) technology. Starting with the limitations of the host-device architecture in USB 1.1, mobile devices struggled to act as both host and device. The Nokia 770 exemplifies this, requiring special adapters for host functionality. The USB OTG specification addressed this, but inconsistent implementations, such as misuse of AB connectors, arose. USB-C ultimately largely solved many OTG issues with its symmetrical interface and more elegant dual-role mechanism, yet edge cases and compatibility problems persist.