Delphi Super Fast Tethering using UDP AutoDiscovery – Fast LAN Device Discovery (VCL + FMX Android) скачать в хорошем качестве

Delphi Super Fast Tethering using UDP AutoDiscovery – Fast LAN Device Discovery (VCL + FMX Android)

💡 If you found this useful, Like 👍, Subscribe 🔔, and Comment 💬 with your ideas on how to extend this demo (e.g., automatic TCP connect after discovery). In this video, we build a Delphi Super Fast Tethering UDP AutoDiscovery demo using Indy components to allow clients and servers to find each other automatically on the same LAN without manual IP setup. 🚀 Whether you’re on Windows (VCL) or Android (FMX), this method lets your apps instantly discover and communicate with each other through UDP Broadcasts and direct responses. 📌 What You’ll Learn (Step by Step) 1️⃣ Server Setup Create a UDP server (TIdUDPServer) bound to port 3434. Listen for broadcast messages from clients. On receiving a discovery request, reply back with the server’s LAN IP. 2️⃣ Client Setup Create a UDP client (TIdUDPClient) configured for broadcast. Send a discovery message: Discovery|Hello, I'm here, is there any UDP Broadcaster there? Listen for server replies on port 22049 using another UDP server. 3️⃣ AutoDiscovery Flow Client → Broadcast: Sends discovery request to all devices on LAN. Server → Response: Replies only to the client with its IP. Client → Log Result: Displays discovered server IP instantly. 4️⃣ Cross-Platform Implementation Windows (VCL): Uses GetAdaptersAddresses to pick the correct LAN interface. Android (FMX): Uses Java NetworkInterface APIs with required permissions in AndroidManifest.xml. 5️⃣ Why It’s So Fast? Uses direct UDP broadcast (instant LAN-wide reach). Replies are sent only once to the predefined client port (22049). Async logging with TThread.Queue keeps the UI responsive. No retries, no loops — just a clean handshake. 📂 Project Source Code 👉 Full code available here: GitHub – Delphi UDP AutoDiscovery: https://github.com/mben-dz/Delphi_UDP... ⚡ Use Cases ✔ Multiplayer LAN games ✔ Smart home device discovery ✔ Auto-configuration of desktop ↔ mobile apps ✔ IoT devices in local networks 🛠 Tools Used Delphi (FMX + VCL) Indy Components (TIdUDPClient, TIdUDPServer) Android + Windows cross-platform networking 💡 If you found this useful, Like 👍, Subscribe 🔔, and Comment 💬 with your ideas on how to extend this demo (e.g., automatic TCP connect after discovery). ✨ Stay tuned for more Delphi cross-platform networking tutorials!