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<img src="https://user-images.githubusercontent.com/211411/34776833-6f1ef4da-f618-11e7-8b13-f0697901d6a8.png" height="100" />

[Github](https://github.com/LedgerHQ/ledgerjs/),
[Ledger Devs Slack](https://ledger-dev.slack.com/)

## @ledgerhq/hw-transport-web-ble

Allows to communicate with Ledger Hardware Wallets.

**[Web]** **(Bluetooth)** – [check browser support](https://caniuse.com/web-bluetooth).

## API

<!-- Generated by documentation.js. Update this documentation by updating the source code. -->

#### Table of Contents

-   [BluetoothTransport](#bluetoothtransport)
    -   [Parameters](#parameters)
    -   [Examples](#examples)
    -   [exchange](#exchange)
        -   [Parameters](#parameters-1)
    -   [observeAvailability](#observeavailability)
        -   [Parameters](#parameters-2)
    -   [listen](#listen)
        -   [Parameters](#parameters-3)
    -   [open](#open)
        -   [Parameters](#parameters-4)
    -   [disconnect](#disconnect)
        -   [Parameters](#parameters-5)

### BluetoothTransport

**Extends Transport**

react-native bluetooth BLE implementation

#### Parameters

-   `device` **Device** 
-   `writeCharacteristic` **Characteristic** 
-   `notifyObservable` **Observable&lt;any>** 
-   `deviceModel` **DeviceModel** 

#### Examples

```javascript
import BluetoothTransport from "@ledgerhq/hw-transport-web-ble";
```

#### exchange

Exchange with the device using APDU protocol.

##### Parameters

-   `apdu` **[Buffer](https://nodejs.org/api/buffer.html)** 

Returns **[Promise](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)&lt;[Buffer](https://nodejs.org/api/buffer.html)>** a promise of apdu response

#### observeAvailability

observe event with { available: bool, type: string }
(available is generic, type is specific)
an event is emit once and then each time it changes

##### Parameters

-   `observer` **any** 

#### listen

Scan for Ledger Bluetooth devices.
On this web implementation, it only emits ONE device, the one that was selected in the UI (if any).

##### Parameters

-   `observer` **any** 

#### open

open a bluetooth device.

##### Parameters

-   `deviceOrId` **(Device | [string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String))** 

#### disconnect

globally disconnect a bluetooth device by its id.

##### Parameters

-   `id` **any** 

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