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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Abhigkar
@PiOfThings
Your answer is here
Because this experimental API is a powerful new feature added to the Web, Google Chrome aims to make it available only to secure contexts. This means you'll need to build with TLS in mind.
During development you'll be able to interact with Web Bluetooth through http://localhost by using tools like the Chrome Dev Editor or the handy python -m SimpleHTTPServer, but to deploy it on a site you'll need to have HTTPS set up on your server.