Science Knowings: HTML Course For Social Media

HTML5 Web Bluetooth API

From SMS API to Bluetooth API

We left off discussing the HTML5 SMS and Telephony API. Now, fasten your seatbelts as we venture into the realm of Bluetooth technology with the HTML5 Web Bluetooth API!

What is Web Bluetooth API?

The Web Bluetooth API empowers web applications to connect, communicate, and control Bluetooth devices directly from the browser.

Why Web Bluetooth API?

Benefits:

  • Enhance user experiences through device integration
  • Enable real-time data exchange between devices and web apps
  • Create innovative IoT (Internet of Things) applications

Connect to Bluetooth Devices

navigator.bluetooth.requestDevice()
.then(device => console.log(device.name));

Discover & List Devices

navigator.bluetooth.getDevices()
.then(devices => {
for (let device of devices) {
console.log(device.name);
}
});

Request Device Access

device.gatt.connect()
.then(() => device.gatt.requestDeviceAccess());

Establish Connection

device.gatt.connect()
.then(server => {
console.log('Connected to ' + server.device.name);
});

Read & Write Characteristics

characteristic.readValue()
.then(value => {
console.log(value.getUint8(0));
});

characteristic.writeValue(new Uint8Array([0x01]));

Subscribe to Notifications

characteristic
.startNotifications().then(() => {
characteristic.addEventListener
('characteristicvaluechanged',
event => console.log(event.target.value));
});

Handle Bluetooth Events

Bluetooth events provide information about connection changes or characteristic updates.

Disconnect from Devices

device.gatt.disconnect();

Security Considerations

Ensure secure Bluetooth communication by implementing encryption, authentication, and authorization mechanisms.

Applications & Examples

Examples:

  • Control IoT devices (e.g., smart lights, thermostats)
  • Interact with fitness trackers and medical devices
  • Create Bluetooth-enabled games and presentations

Next: HTML5 Web NFC API

Coming up next, we'll explore the HTML5 Web NFC API, which allows web apps to interact with Near Field Communication (NFC) devices. Stay tuned for more on wireless technology!