a-bluetooth-terminal

bluetooth-terminal

BluetoothTerminal is a class written in ES6 for serial communication with Bluetooth Low Energy (Smart) devices from the web using Web Bluetooth API.

With this class you can communicate bidirectionally with your own device through the one General Attribute Profile characteristic that only offered by DIY modules.

Please check out the Web-Bluetooth-Terminal repository to see implementation details in a real life example.

Quick start

Install

You can use the script directly or install it using npm and require in your code.

npm install bluetooth-terminal

Use

// Obtain configured instance.
let terminal = new BluetoothTerminal();

// Override `receive` method to handle incoming data as you want.
terminal.receive = function(data) {
  alert(data);
};

// Request the device for connection and get its name after successful connection.
terminal.connect().then(() => {
  alert(terminal.getDeviceName() + ' is connected!');
});

// Send something to the connected device.
terminal.send('Simon says: Hello, world!');

// Disconnect from the connected device.
terminal.disconnect();

API

BluetoothTerminal

Bluetooth Terminal class.

Kind: global class

• BluetoothTerminal
  • new BluetoothTerminal([serviceUuid], [characteristicUuid], [receiveSeparator], [sendSeparator], [onConnected], [onDisconnected])
  • setServiceUuid(uuid)
  • setCharacteristicUuid(uuid)
  • setReceiveSeparator(separator)
  • setSendSeparator(separator)
  • setOnConnected(listener)
  • setOnDisconnected(listener)
  • connect() ⇒ Promise
  • disconnect()
  • receive(data)
  • send(data) ⇒ Promise
  • getDeviceName() ⇒ string

---

new BluetoothTerminal([serviceUuid], [characteristicUuid], [receiveSeparator], [sendSeparator], [onConnected], [onDisconnected])

Create preconfigured Bluetooth Terminal instance.

Parameter	Type	Default	Description
[serviceUuid]	number | string	0xFFE0	Service UUID
[characteristicUuid]	number | string	0xFFE1	Characteristic UUID
[receiveSeparator]	string	'\n'	Receive separator
[sendSeparator]	string	'\n'	Send separator
[onConnected]	Function | null	null	Listener for connected event
[onDisconnected]	Function | null	null	Listener for disconnected event

---

setServiceUuid(uuid)

Set number or string representing service UUID used.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
uuid	number | string	Service UUID

---

setCharacteristicUuid(uuid)

Set number or string representing characteristic UUID used.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
uuid	number | string	Characteristic UUID

---

setReceiveSeparator(separator)

Set character representing separator for data coming from the connected device, end of line for example.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
separator	string	Receive separator with length equal to one

---

setSendSeparator(separator)

Set string representing separator for data coming to the connected device, end of line for example.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
separator	string	Send separator

---

setOnConnected(listener)

Set a listener to be called after a device is connected.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
listener	Function | null	Listener for connected event

---

setOnDisconnected(listener)

Set a listener to be called after a device is disconnected.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
listener	Function | null	Listener for disconnected event

---

connect() ⇒ Promise

Launch Bluetooth device chooser and connect to the selected device.

Kind: instance method of BluetoothTerminal

Returns: Promise - Promise which will be fulfilled when notifications will be started or rejected if something went wrong

---

disconnect()

Disconnect from the connected device.

Kind: instance method of BluetoothTerminal

---

receive(data)

Data receiving handler which called whenever the new data comes from the connected device, override it to handle incoming data.

Kind: instance method of BluetoothTerminal

Parameter	Type	Description
data	string	Data

---

send(data) ⇒ Promise

Send data to the connected device.

Kind: instance method of BluetoothTerminal

Returns: Promise - Promise which will be fulfilled when data will be sent or rejected if something went wrong

Parameter	Type	Description
data	string	Data

---

getDeviceName() ⇒ string

Get the connected device name.

Kind: instance method of BluetoothTerminal

Returns: string - Device name or empty string if not connected

Contribution

Please use the dev branch and feel free to contribute!