The independent, practitioner-built reference for WebSocket technology. Protocol internals, production patterns, scaling guides, and honest protocol comparisons with real code.
Inside the tab, check the box or click the button labeled Enable Mapped Device . The controller icon should turn from a gray state to green, showing that mapping communications are fully functional. Step 3: Button Assignment
Interactive Tools
Test WebSocket connections in real time. Send messages and see them echoed back instantly — no signup, no setup.
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One request, one response. Connection closes. Every interaction has overhead.
Server streams to client only. Great for push — can't send back.
Full-duplex, persistent. Both sides send whenever they want.
Inside the tab, check the box or click the button labeled Enable Mapped Device . The controller icon should turn from a gray state to green, showing that mapping communications are fully functional. Step 3: Button Assignment