Authors: Bhor Anwit Rajendra, Prof. M. A. Auti, Prof. M. C. Kolse, Prof. S. K. Said
Abstract: Sudden rain and intense sunlight affect daily commuting, yet people frequently leave home without an umbrella or forget it at offices, buses and shops. Conventional umbrellas offer protection but no intelligence. This paper reviews the design of a smart umbrella reminder system that combines Internet of Things (IoT) sensing, wireless proximity tracking and machine-learning-based weather prediction to remind users at the right moment. The review covers environmental sensing of rainfall, temperature, humidity and light; Bluetooth Low Energy (BLE) links between the umbrella and a smartphone for left-behind alerts based on received signal strength; consumption of weather forecasts and short-term precipitation nowcasts; and context-aware logic that considers the user's schedule and location before issuing a reminder. Low-power hardware design, including duty cycling and energy harvesting, is examined because the device must operate for months on a small battery. A layered architecture covering the umbrella node, the smartphone gateway, a cloud service and the user interface is proposed, followed by a research gap analysis, objectives, comparison of connectivity and prediction options, and a discussion of challenges. The review concludes that a low-cost, context-aware smart umbrella is a practical example of how everyday objects can become helpful IoT companions.