Web Bluetooth Terminal

Ce projet a été honteusement pompé sur celui de loginov-rocks. Il a été adapté pour fonctionner avec les modules Adafruit Bluefruit LE: les identifiants UUID des services et des caractéristiques sont différents

https://loginov-rocks.github.io/Web-Bluetooth-Terminal — try it out, see how it works on YouTube, read tutorial on Medium (English) or on Habr (Russian).

Web Bluetooth Terminal is a website that can connect with the remote devices which support Bluetooth Low Energy (also called Bluetooth Smart) and exchange data bidirectionally. It can be installed on your homescreen as an application and work offline.

One of browsers which supports Web Bluetooth API by default (Chrome Platform Status, Can I use):

1. Chrome for desktop 56+
2. Chrome for Android 56+
3. Opera 43+
4. Opera for Android 43+

All this browsers support other necessary features, such as ES6 classes and PWA capabilities (Web App Manifest and Service Workers), so I don't pay attention to it here.

BLE module configuration

When a BLE module is waiting for connection it can be configured with AT commands. So if you have troubles trying to make BLE module work as expected you can use following commands, but again, read specifications! Here are some commands I use with CC41-A module:

• AT+DEFAULT — resets the module to the defaults;
• AT+RESET — resets the module softly;
• AT+ROLE — gets the module working mode;
• AT+ROLE0 — makes the module to work in slave mode, waiting for connection from other devices;
• AT+NAME — gets the module name;
• AT+NAMESimon — sets the module name to Simon;
• AT+PIN — gets the module pin (password);
• AT+PIN123456 — sets the module pin to 123456;
• AT+UUID — gets the module service UUID;
• AT+CHAR — gets the module characteristic UUID.

Commands can be case insensitive and may need to be terminated with CR (\r) and LF (\n).

Reference

1. Web Bluetooth Specification
2. Web Bluetooth Samples
3. Interact with Bluetooth devices on the Web
4. Progressive Web Apps
5. Service Worker Toolbox