Overview

Local Signage is an integrated digital signage ecosystem designed for high-performance multimedia delivery over local area networks (LAN/WLAN). This project solves the challenge of centralizing content management for multiple TV displays without relying on external internet bandwidth, making it ideal for corporate environments, retail, or industrial signage.

Key Features

• Centralized Content Management (CMS): A powerful web-based dashboard for uploading media, managing playlists, and scheduling content delivery.
• Local Network Streaming: Optimized delivery of video and image assets over local networks, ensuring zero latency and zero internet data consumption.
• Cross-Platform TV Client: A dedicated display application built with Flutter, optimized for Smart TVs and Android-based TV boxes to ensure smooth 4K/HD playback.
• Real-time Synchronization: Instant updates across all connected display nodes when changes are made in the central CMS.
• Offline Reliability: Designed to keep displaying content even if the central server briefly disconnects, using local caching mechanisms.

Technologies Used

• Next.js & TypeScript: For the core administrative dashboard and management APIs.
• Prisma ORM: Managing the database for media assets, device registry, and playlists.
• Flutter (Dart): For the high-performance display client, leveraging native graphics rendering.
• Tailwind CSS: Providing a responsive and modern interface for the CMS.
• Native System Integration: Utilizing C++ and Swift for low-level system optimizations to ensure video playback stability.

Challenges and Learnings

The primary technical challenge was ensuring stable, continuous video playback across different TV hardware specs. Developing with Flutter allowed for a unified codebase while maintaining high performance. I also focused heavily on network discovery, allowing display nodes to automatically find the central server within the local network, which significantly simplified the setup process for end-users.

Outcome

The result is a robust, scalable signage system that allows organizations to turn any TV into a dynamic communication tool. By combining web technologies for management and mobile frameworks for display, the system provides a seamless end-to-end experience for both administrators and viewers.