Getting Started

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Install

bun add @capgo/capacitor-bluetooth-low-energy
bunx cap sync

Import

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

API Overview

`initialize`

Initialize the BLE plugin. Must be called before any other method.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.initialize({ mode: 'central' });

`shimWebBluetooth`

Install the Capacitor Web Bluetooth shim on navigator.bluetooth. Call this manually before using the Web Bluetooth API from a Capacitor native app.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

BluetoothLowEnergy.shimWebBluetooth();

`isAvailable`

Check if Bluetooth is available on the device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { available } = await BluetoothLowEnergy.isAvailable();

`isEnabled`

Check if Bluetooth is enabled on the device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { enabled } = await BluetoothLowEnergy.isEnabled();

`isLocationEnabled`

Check if location services are enabled (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { enabled } = await BluetoothLowEnergy.isLocationEnabled();

`openAppSettings`

Open the app settings page.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.openAppSettings();

`openBluetoothSettings`

Open the Bluetooth settings page (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.openBluetoothSettings();

`openLocationSettings`

Open the location settings page (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.openLocationSettings();

`checkPermissions`

Check the current permission status.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { bluetooth, location } = await BluetoothLowEnergy.checkPermissions();

`requestPermissions`

Request Bluetooth permissions.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { bluetooth, location } = await BluetoothLowEnergy.requestPermissions();

`startScan`

Start scanning for BLE devices.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.startScan({
  services: ['180D'], // Heart Rate Service
  timeout: 10000
});

`stopScan`

Stop scanning for BLE devices.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.stopScan();

`connect`

Connect to a BLE device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.connect({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`disconnect`

Disconnect from a BLE device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.disconnect({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`createBond`

Create a bond with a BLE device (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.createBond({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`isBonded`

Check if a device is bonded (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { bonded } = await BluetoothLowEnergy.isBonded({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`discoverServices`

Discover services on a connected device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.discoverServices({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`getServices`

Get discovered services for a device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { services } = await BluetoothLowEnergy.getServices({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`getConnectedDevices`

Get a list of connected devices.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { devices } = await BluetoothLowEnergy.getConnectedDevices();

`readCharacteristic`

Read a characteristic value.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { value } = await BluetoothLowEnergy.readCharacteristic({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A37'
});

`writeCharacteristic`

Write a value to a characteristic.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.writeCharacteristic({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A39',
  value: [0x01]
});

`startCharacteristicNotifications`

Start notifications for a characteristic.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.startCharacteristicNotifications({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A37'
});

`stopCharacteristicNotifications`

Stop notifications for a characteristic.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.stopCharacteristicNotifications({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A37'
});

`readDescriptor`

Read a descriptor value.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { value } = await BluetoothLowEnergy.readDescriptor({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A37',
  descriptor: '2902'
});

`writeDescriptor`

Write a value to a descriptor.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.writeDescriptor({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  service: '180D',
  characteristic: '2A37',
  descriptor: '2902',
  value: [0x01, 0x00]
});

`readRssi`

Read the RSSI (signal strength) of a connected device.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { rssi } = await BluetoothLowEnergy.readRssi({ deviceId: 'AA:BB:CC:DD:EE:FF' });

`requestMtu`

Request MTU size change (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

const { mtu } = await BluetoothLowEnergy.requestMtu({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  mtu: 512
});

`requestConnectionPriority`

Request connection priority (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.requestConnectionPriority({
  deviceId: 'AA:BB:CC:DD:EE:FF',
  priority: 'high'
});

`startAdvertising`

Start advertising as a peripheral (BLE server).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.startAdvertising({
  name: 'MyDevice',
  services: ['180D']
});

`stopAdvertising`

Stop advertising.

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.stopAdvertising();

`startForegroundService`

Start a foreground service to maintain BLE connections in background (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.startForegroundService({
  title: 'BLE Connection',
  body: 'Maintaining connection...'
});

`stopForegroundService`

Stop the foreground service (Android only).

import { BluetoothLowEnergy } from '@capgo/capacitor-bluetooth-low-energy';

await BluetoothLowEnergy.stopForegroundService();

Type Reference

`InitializeOptions`

Initialization options for the plugin.

export interface InitializeOptions {
  /**
   * The mode to initialize the plugin in.
   * - 'central': Act as a BLE central (client)
   * - 'peripheral': Act as a BLE peripheral (server)
   *
   * @default 'central'
   * @since 1.0.0
   */
  mode?: 'central' | 'peripheral';
}

`IsAvailableResult`

Result of the isAvailable method.

export interface IsAvailableResult {
  /**
   * Whether Bluetooth is available on the device.
   *
   * @since 1.0.0
   */
  available: boolean;
}

`IsEnabledResult`

Result of the isEnabled method.

export interface IsEnabledResult {
  /**
   * Whether Bluetooth is enabled on the device.
   *
   * @since 1.0.0
   */
  enabled: boolean;
}

`IsLocationEnabledResult`

Result of the isLocationEnabled method.

export interface IsLocationEnabledResult {
  /**
   * Whether location services are enabled on the device.
   *
   * @since 1.0.0
   */
  enabled: boolean;
}

`PermissionStatus`

Permission status for Bluetooth and location.

export interface PermissionStatus {
  /**
   * Bluetooth permission status.
   *
   * @since 1.0.0
   */
  bluetooth: PermissionState;

  /**
   * Location permission status (Android only).
   *
   * @since 1.0.0
   */
  location: PermissionState;
}

`StartScanOptions`

Options for starting a scan.

export interface StartScanOptions {
  /**
   * List of service UUIDs to filter by.
   * Only devices advertising these services will be returned.
   *
   * @since 1.0.0
   */
  services?: string[];

  /**
   * Scan timeout in milliseconds.
   * Set to 0 for no timeout.
   *
   * @default 0
   * @since 1.0.0
   */
  timeout?: number;

  /**
   * Whether to allow duplicate scan results.
   *
   * @default false
   * @since 1.0.0
   */
  allowDuplicates?: boolean;
}

`ConnectOptions`

Options for connecting to a device.

export interface ConnectOptions {
  /**
   * The device ID (MAC address on Android, UUID on iOS).
   *
   * @since 1.0.0
   */
  deviceId: string;

  /**
   * Whether to automatically connect when the device becomes available.
   *
   * @default false
   * @since 1.0.0
   */
  autoConnect?: boolean;
}

`DisconnectOptions`

Options for disconnecting from a device.

export interface DisconnectOptions {
  /**
   * The device ID to disconnect from.
   *
   * @since 1.0.0
   */
  deviceId: string;
}

`CreateBondOptions`

Options for creating a bond.

export interface CreateBondOptions {
  /**
   * The device ID to bond with.
   *
   * @since 1.0.0
   */
  deviceId: string;
}

`IsBondedOptions`

Options for checking bond status.

export interface IsBondedOptions {
  /**
   * The device ID to check.
   *
   * @since 1.0.0
   */
  deviceId: string;
}

`IsBondedResult`

Result of the isBonded method.

export interface IsBondedResult {
  /**
   * Whether the device is bonded.
   *
   * @since 1.0.0
   */
  bonded: boolean;
}

`DiscoverServicesOptions`

Options for discovering services.

export interface DiscoverServicesOptions {
  /**
   * The device ID to discover services on.
   *
   * @since 1.0.0
   */
  deviceId: string;
}

Source Of Truth

This page is generated from the plugin’s src/definitions.ts. Re-run the sync when the public API changes upstream.