Thiết kế bảng LED chạy chữ điều khiển qua wifi

The rapid development of the Internet and wireless communication technologies, particularly WiFi, has opened new avenues for diverse applications, including dynamic advertising. Traditional advertising methods can be costly and inflexible. In this context, LED running text panels have emerged as a popular and economical solution for businesses to effectively promote products and attract customers. This paper addresses the need for an accessible and customizable advertising display by presenting the research and design of a software and hardware system for a LED panel running text controlled by WiFi, enabling remote content updates via smartphones. This approach aims to provide a cost-effective and flexible advertising tool, leveraging the ubiquity of wireless networks.

Engineers, technicians, students, and researchers in electronics, embedded systems, wireless communication, and IoT application development, as well as small business owners interested in affordable and dynamic advertising solutions.

This paper details the research and development of a LED panel running text controlled by WiFi, aiming to provide an economical and flexible advertising solution, particularly for small businesses. The core system integrates an Esp8266 Node MCU module for WiFi connectivity, a PIC18F4520 microcontroller for processing, and LED ma trận (LED matrix) displays for visual output. The methodology encompasses both hardware and software design. Hardware components are carefully selected and interconnected to ensure reliable communication and display. Software development involves programming the Node MCU using Arduino IDE for WiFi communication and handling control commands, while the PIC18F4520 is programmed via Mplap to manage the LED matrix display and implement text scrolling effects. The system facilitates remote content updates, allowing users to easily change displayed text and scroll speed through a smartphone application (e.g., Blynk) without physical intervention. This not only significantly reduces operational costs compared to traditional signage but also offers dynamic content management crucial for modern advertising. While the current prototype successfully demonstrates the concept, including remote text modification and speed control, the authors acknowledge limitations such as WiFi range constraints, potential signal interference, display resolution, and durability. Future work is suggested to enhance the system with multi-color capabilities, larger display sizes, improved robustness, and advanced functionalities to meet broader application demands.