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Scratch Link 1.4.3.0, published by the Scratch Foundation, is a lightweight helper utility that bridges the gap between the Scratch programming environment and external hardware devices such as the BBC micro:bit. Installed silently in the background on Windows, the application exposes a local WebSocket server that translates Scratch’s block-based commands into Bluetooth Low Energy instructions the micro:bit understands, enabling learners to animate sprites on screen in response to accelerometer readings, button presses, or sensor data from the physical board. Because Scratch itself runs inside a secure browser sandbox, direct hardware access is impossible; Scratch Link therefore acts as a privileged proxy, relaying only the specific messages required for educational projects like step counters, tilt-controlled games, or simple data loggers. The single-version installer (1.4.3.0) is distributed as a digitally signed MSI that registers itself as a Windows service, starts automatically with the operating system, and listens on localhost port 20110 without exposing any external endpoints, preserving classroom network security. Once paired, students can combine Scratch’s visual coding blocks with the micro:bit’s built-in LED matrix, temperature sensor, and radio module to explore introductory robotics, physical computing, and IoT concepts without writing a line of text-based code. The utility is categorized under Educational Software / Hardware Extensions and is designed for primary and secondary STEM curricula, maker clubs, and coding workshops where rapid iteration between software logic and tangible feedback accelerates conceptual understanding. Scratch Link is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest version, and supporting batch installation of multiple applications.
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