npm

About this library

This is React Native Bluetooth Low Energy library using RxBluetoothKit and RxAndroidBle under the hood.

It supports:

• observing device's Bluetooth adapter state
• scanning BLE devices
• making connections to peripherals
• discovering services/characteristics
• reading/writing characteristics
• observing characteristic notifications/indications
• reading RSSI
• negotiating MTU
• turning the device's Bluetooth adapter on

What this library does NOT support:

• communicating between phones using BLE (Peripheral support)
• bonding peripherals

Recent Changes

1.0.1

• Fix possible ConcurrentModificationException in Android BleModule.
• Workaround for when canSendWriteWithoutResponse would return false on iOS.
• Fixed low severity vulnerabilities reported by npm in development dependencies.

All previous changes

Documentation & Support

Interested in React Native project involving Bluetooth Low Energy? We can help you!

Documentation can be found here.

Contact us at Gitter if you have any questions, feedback or want to help!

Configuration & Installation

iOS (pure react-native, example setup)

1. npm install --save react-native-ble-plx
2. react-native link react-native-ble-plx
3. Add empty Swift file if you don't have at least one:
   • Select File/New/File...
   • Choose Swift file and click Next.
   • Name it however you want, select your targets and create it.
   • Accept to create Objective-C bridging header.
4. Minimal supported version of iOS is 8.0
5. If you want to support background mode:
   • In your application target go to Capabilities tab and enable Uses Bluetooth LE Accessories in Background Modes section.
   • Pass restoreStateIdentifier and restoreStateFunction to BleManager constructor.

iOS (expo/Podfile, example setup)

1. Make sure your Expo project is detached. You can read how to do it here and here.
2. npm install --save react-native-ble-plx
3. react-native link react-native-ble-plx
4. Add empty Swift file if you don't have at least one:
   • Select File/New/File...
   • Choose Swift file and click Next.
   • Name it however you want, select your application target and create it.
   • Accept to create Objective-C bridging header.
5. Update your ios/Podfile to contain:

   pod 'react-native-ble-plx', :path => '../node_modules/react-native-ble-plx'
   pod 'react-native-ble-plx-swift', :path => '../node_modules/react-native-ble-plx'
   

6. Enter ios folder and run pod update
7. Minimal supported version of iOS is 8.0
8. If you want to support background mode:
   • In your application target go to Capabilities tab and enable Uses Bluetooth LE Accessories in Background Modes section.
   • Pass restoreStateIdentifier and restoreStateFunction to BleManager constructor.

Android (example setup)

1. npm install --save react-native-ble-plx
2. react-native link react-native-ble-plx
3. In build.gradle of app module make sure that min SDK version is at least 18:

android {
    ...
    defaultConfig {
        minSdkVersion 18
        ...

1. In AndroidManifest.xml, add Bluetooth permissions and update <uses-sdk/>:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ...
    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>
 
    <!-- Add this line if your application always requires BLE. More info can be found on:
         https://developer.android.com/guide/topics/connectivity/bluetooth-le.html#permissions
      -->
    <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
 
    <uses-sdk
        android:minSdkVersion="18"
        ...

Troubleshooting

Problems with Proguard

Add this to your app/proguard-rules.pro

-dontwarn com.polidea.reactnativeble.**