Forked from capacitor-bluetooth-serial (archived)

A client implementation for interacting with Bluetooth (serial), using Capacitor.

Supported platforms

• Web
• Android
• iOS

Supported Capacitor versions:

• Capacitor <= 3: Please use capacitor-bluetooth-serial (<= v0.0.3)
• Capacitor 4 (v0.4.x)
• Capacitor 5 (v0.7.x)

Install the plugin via npm

npm install --save https://github.com/nocola-aris/capacitor-bluetooth-serial

import { BluetoothSerial } from "@hydac/capacitor-bluetooth";

//...do something with plugin

Interface and type definitions can be found here.

• BluetoothSerial.isEnabled
• BluetoothSerial.enable
• BluetoothSerial.disable
• BluetoothSerial.requestEnable
• BluetoothSerial.isLocationEnabled
• BluetoothSerial.getBondedDevices
• BluetoothSerial.startEnabledNotifications
• BluetoothSerial.stopEnabledNotifications
• BluetoothSerial.scan
• BluetoothSerial.connect
• BluetoothSerial.connectInsecure
• BluetoothSerial.disconnect
• BluetoothSerial.isConnected
• BluetoothSerial.read
• BluetoothSerial.readUntil
• BluetoothSerial.startNotifications
• BluetoothSerial.stopNotifications
• BluetoothSerial.write

Reports if bluetooth is enabled.

isEnabled(): Promise<BluetoothState>;

Function isEnabled calls the success whatever bluetooth is enabled or not. The promise will contain an attribute enabled indicating if bluetooth is enabled or not enabled. The failure callback will be called only if an error occurs.

If you want to enable bluetooth afterwards, you can use #enable directly, once #enable also check if the bluetooth is conected or not.

None.

BluetoothSerial
  .isEnabled()
  .then((response: BluetoothState) => {
    const status = response.enabled ? 'enabled' : 'disabled';
    console.log(`Bluetooth is ${status}`);
  })
  .catch(() => {
    console.log('Error checking bluetooth status');
  });

Enable bluetooth if it is not enabled. Also request permissions for bluetooth access if it is necessary.

enable(): Promise<BluetoothState>;

Function enable calls the success whatever bluetooth is successfully enabled or not. The promise will contain an attribute enabled indicating if bluetooth is enabled or not enabled after the process. The failure callback will be called only if an error occurs.

If the app does not have permission to use bluetooth, it will request it.

None.

BluetoothSerial
  .enable()
  .then((response: BluetoothState) => {
    const status = response.enabled ? 'enabled' : 'disabled';
    console.log(`Bluetooth is ${status}`);
  })
  .catch(() => {
    console.log('Error enabling bluetooth');
  });

Disable bluetooth if enabled. Also request permissions for bluetooth access if it is necessary.

disable(): Promise<BluetoothState>;

Function disable calls the success whatever bluetooth is successfully disabled or not. The promise will contain an attribute enabled indicating if bluetooth is enabled or not enabled after the process. The failure callback will be called only if an error occurs.

If the app does not have permission to use bluetooth, it will request it.

None.

BluetoothSerial
  .disable()
  .then((response: BluetoothState) => {
    const status = response.enabled ? 'enabled' : 'disabled';
    console.log(`Bluetooth is ${status}`);
  })
  .catch(() => {
    console.log('Error disabling bluetooth');
  });

Enable bluetooth if it is not enabled. Also request permissions for bluetooth access if it is necessary.

requestEnable(): Promise<BluetoothState>;

Function requestEnable calls the success whatever bluetooth is successfully enabled or not. The promise will contain an attribute enabled indicating if bluetooth is enabled or not enabled after the process. The failure callback will be called only if an error occurs.

If the app does not have permission to use bluetooth, it will request it.

None.

BluetoothSerial
  .requestEnable()
  .then((response: BluetoothState) => {
    const status = response.enabled ? 'enabled' : 'disabled';
    console.log(`Bluetooth is ${status}`);
  })
  .catch(() => {
    console.log('Error enabling bluetooth');
  });

Reports if location is enabled.

isLocationEnabled(): Promise<BluetoothState>;

Function isLocationEnabled calls the success whatever location is enabled or not. The promise will contain an attribute enabled indicating if location is enabled or not enabled. The failure callback will be called only if an error occurs.

If you want to enable location afterwards, you can use #enable directly, once #enable also check if the location is conected or not.

None.

BluetoothSerial
  .isLocationEnabled()
  .then((response: BluetoothState) => {
    const status = response.enabled ? 'enabled' : 'disabled';
    console.log(`Location is ${status}`);
  })
  .catch(() => {
    console.log('Error checking location status');
  });

Get previously connected devices

getBondedDevices(): Promise<BluetoothScanResult>;

Function getBondedDevices returns the Bluetooth devices that previously connected. The success callback is called with a list of objects similar to list, or an empty list if no devices are found.

Example list passed to success callback.

[{
    "class": 0,
    "id": "00:11:22:33:44:55",
    "address": "00:11:22:33:44:55",
    "name": "Device 1"
}, {
    "class": 7936,
    "id": "01:23:6645:4D67:89:00",
    "address": "01:23:6645:4D67:89:00",
    "name": "Device 2"
}]

None.

BluetoothSerial
  .getBondedDevices()
  .then((result: BluetoothScanResult) => {
    result.devices.forEach((device: BluetoothDevice) {
        console.log(device.id);
    });
  })
  .catch(() => {
    console.log('Error scanning devices');
  });

Be notified when bluetooth status changed.

startEnabledNotifications(): Promise<void>;

Function startEnabledNotifications enable status notifications. In order to retrieve the values, use an Event Listener with 'onEnabledChanged' as event name.

const eventListener = BluetoothSerial.addListener('onEnabledChanged' , (response: BluetoothState) => {

    const { enabled } = response;
    //Do something with enabled variable
});

None.

BluetoothSerial
  .startEnabledNotifications()
  .then(() => {
      eventListener = BluetoothSerial.addListener('onEnabledChanged', (data: BluetoothState) => {
        console.log('Bluetooth state changed to ' + (data.enabled ? 'Enabled' : 'Disabled'));
      });
  })
  .catch(() => {
    console.log('Error starting enabled listener');
  });

Stops the propagation of value changes.

stopEnabledNotifications(): Promise<void>;

Function stopEnabledNotifications disable bluetooth state notifications. Additionally, the event listener has to be removed.

eventListener.remove();

None.

BluetoothSerial
  .stopEnabledNotifications()
  .then(() => {
      eventListener.remove();
  })
  .catch(() => {
    console.log('Error disabling listener for device');
  });

Discover devices visible and close to the device

scan(): Promise<BluetoothScanResult>;

Function scan discovers Bluetooth devices close to the device and visible. The success callback is called with a list of objects similar to list, or an empty list if no devices are found.

Example list passed to success callback.

[{
    "class": 0,
    "id": "00:11:22:33:44:55",
    "address": "00:11:22:33:44:55",
    "name": "Device 1"
}, {
    "class": 7936,
    "id": "01:23:6645:4D67:89:00",
    "address": "01:23:6645:4D67:89:00",
    "name": "Device 2"
}]

The discovery process takes a while to happen. You may want to show a progress indicator while waiting for the discover proces to finish, and the sucess callback to be invoked.

Calling connect on an unpaired Bluetooth device should begin the Android pairing process.

None.

BluetoothSerial
  .scan()
  .then((result: BluetoothScanResult) => {
    result.devices.forEach((device: BluetoothDevice) {
        console.log(device.id);
    });
  })
  .catch(() => {
    console.log('Error scanning devices');
  });

Connect to a Bluetooth device.

connect(options: BluetoothConnectOptions): Promise<void>;

Function connect connects to a Bluetooth device. The callback Success will be called when the connection is successful. Failure is called if the connection fails.

For Android, connect takes a MAC address of the remote device.

• { address }: Identifier of the remote device.

BluetoothSerial
  .connect({
    address: '00:11:22:33:44:55',
  })
  .then(() => {
    console.log('Successfully connected')
  })
  .catch(() => {
    console.log('Error connecting...');
  });

Connect insecurely to a Bluetooth device.

connectInsecure(options: BluetoothConnectOptions): Promise<void>;

Function connectInsecure connects to a Bluetooth device. The callback Success will be called when the connection is successful. Failure is called if the connection fails. Function connectInsecure works like BluetoothSerial.connect, but creates an insecure connection to a Bluetooth device. See the Android docs for more information.

For Android, connectInsecure takes a MAC address of the remote device.

• { address }: Identifier of the remote device.

BluetoothSerial
  .connectInsecure({
    address: '00:11:22:33:44:55',
  })
  .then(() => {
    console.log('Successfully connected')
  })
  .catch(() => {
    console.log('Error connecting...');
  });

Disconnect a Bluetooth device.

disconnect(options: BluetoothConnectOptions): Promise<void>;

Function disconnect disconnects a Bluetooth device. The callback Success will be called when the disconnection is successful. Failure is called if the disconnection fails.

For Android, disconnect takes a MAC address of the remote device.

Warning: If no address is passed, all devices will be disconnected.

• { address }: Identifier of the remote device.

BluetoothSerial
  .disconnect({
    address: '00:11:22:33:44:55',
  })
  .then(() => {
    console.log('Successfully disconnected')
  })
  .catch(() => {
    console.log('Error disconnecting...');
  });

Reports the connection status.

isConnected(options: BluetoothConnectOptions): Promise<BluetoothConnectResult>;

Function isConnected calls the success callback with the connection status (connected or not connected). Failure will be called only if an error occurs.

For Android, isConnected takes a MAC address of the remote device.

• { address }: Identifier of the remote device.

BluetoothSerial
  .isConnected({
    address: '00:11:22:33:44:55',
  })
  .then((result: BluetoothConnectResult) => {
    const status = result.connected ? 'connected' : 'disconnected';
    console.log(`Device is ${status}`);
  })
  .catch(() => {
    console.log('Error checking connection status');
  });

Reads data from the buffer.

read(options: BluetoothReadOptions): Promise<BluetoothReadResult>;

Function read reads the data from the buffer. The data is passed to the success callback as a String. Calling read when no data is available will pass an empty String to the callback.

• { address }: Identifier of the remote device.

BluetoothSerial
  .read({
    address: '00:11:22:33:44:55',
  })
  .then((result: BluetoothReadResult) => {
    console.log(result.data);
  })
  .catch(() => {
    console.log('Error reading data from device');
  });

Reads data from the buffer until it reaches a delimiter.

readUntil(options: BluetoothReadUntilOptions): Promise<BluetoothReadResult>;

Function readUntil reads the data from the buffer until it reaches a delimiter. The data is passed to the success callback as a String. If the buffer does not contain the delimiter, an empty String is passed to the callback.

• { address }: Identifier of the remote device.
• { delimiter }: Delimiter.

BluetoothSerial
  .readUntil({
    address: '00:11:22:33:44:55',
    delimiter: '\n',
  })
  .then((result: BluetoothReadResult) => {
    console.log(result.data);
  })
  .catch(() => {
    console.log('Error reading data from device');
  });

Enable and be notified when any data is received.

startNotifications(options: BluetoothEnableNotificationsOptions): Promise<void>;

Function startNotifications enable notifications. In order to retrieve the values, use an Event Listener with 'onRead' as event name.

const eventListener = BluetoothSerial.addListener('onRead' , (response: BluetoothReadResult) => {

    const { value } = response;
    //Do something with the value
});

• { address }: Identifier of the remote device.
• { delimiter }: Delimiter for notification.

BluetoothSerial
  .startNotifications({
    address: '00:11:22:33:44:55',
    delimiter: '\n',
  })
  .then((result: BluetoothEnableNotificationsResult) => {
      eventListener = BluetoothSerial.addListener('onRead', (data: BluetoothReadResult) => {
      console.log("Received value: " + data.value);
    });
  })
  .catch(() => {
    console.log('Error enabling listener for device');
  });

Stops the propagation of value changes.

stopNotifications(options: BluetoothDisableNotificationsOptions): Promise<void>;

Function stopNotifications disable notifications. Additionally, the event listener has to be removed.

eventListener.remove();

• { address }: Identifier of the remote device.

BluetoothSerial
  .stopNotifications({
    address: '00:11:22:33:44:55',
  })
  .then(() => {
    eventListener.remove();
  })
  .catch(() => {
    console.log('Error disabling listener for device');
  });

Write data to the buffer.

write(options: BluetoothWriteOptions): Promise<void>;

Function write writes data to the buffer.

• { address }: Identifier of the remote device.
• { value }: String to send.

BluetoothSerial
  .write({
    address: '00:11:22:33:44:55',
    value: 'Hello world',
  })
  .then(() => {
    console.log('Value sent to device');
  })
  .catch(() => {
    console.log('Error writing data to device');
  });