An Embedded Web-Managed Infrared Learning Remote on the Arduino UNO R4 WiFi: System Design and Implementation Review

This report presents the design and source-level implementation of IR Learner, an open-source infrared learning remote built around the Arduino UNO R4 WiFi. The system integrates interrupt-driven infrared pulse capture, protocol-specific decoding, hardware-timed carrier generation, persistent command storage, and a browser-accessible interface using HTTP and WebSocket communication. Raw infrared captures are retained as microsecond timing sequences, allowing replay even when protocol recognition fails. The report examines the system architecture, hardware configuration, firmware implementation, storage mechanism, and web interface. It also documents implementation limitations, including uneven protocol decoder coverage, heuristic signal quality indicators, finite capture and storage capacity, and the absence of controlled performance measurements. The work provides a reproducible engineering baseline for embedded infrared communication systems and identifies directions for future experimental evaluation.