React Native (iOS and Android) library for beacons (and all other beacons)
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Improve error handling of android methods
Latest commit 9a4f01c Nov 8, 2018

react-native-kontaktio npm version

Cross-platform React Native module for detecting beacons with Android and iOS devices. SDK Versions of newest release:

OS SDK Version
Android 4.0.1 (Documentation points to 4.0.2)
iOS 1.4.3

The documentation points to 4.0.2 because there is none specifically for 4.0.1. The Android SDK Version 4.0.2 could not be installed.


  • Works with any beacon (becquse the SDK wraps the native beacon libraries (while adding more) - no SDK API key is necessary.
  • Especially useful with beacons because additional information like the unique id (on the back of each beacon), the battery power level and others are available and get synchronized with your online panel.
  • Highly customizable configurations (e.g. for setting arbitrary monitoring intervals on Android)


API Documentation


Extensive Example

Minimal Example

A minimal example with the default configuration and no specifically set regions. Thus, the default region everywhere (i.e. all beacons) is automatically used.



import React, { Component } from 'react';
import { View, DeviceEventEmitter } from 'react-native';

import Kontakt from 'react-native-kontaktio';
const { connect, startScanning } = Kontakt;

export default class MinimalExample extends Component {
  componentDidMount() {
      .then(() => startScanning())
      .catch(error => console.log('error', error));

      ({ beacons, region }) => {
        console.log('beaconsDidUpdate', beacons, region);

  render() {
    return <View />;



import React, { Component } from 'react';
import { View, NativeEventEmitter } from 'react-native';

import Kontakt, { KontaktModule } from 'react-native-kontaktio';
const { init, startDiscovery } = Kontakt;

const kontaktEmitter = new NativeEventEmitter(KontaktModule);

 * Minimal example of react-native-kontaktio
export default class MinimalExample extends Component {
  componentDidMount() {
      .then(() => startDiscovery())
      .catch(error => alert('error', error));

    // Add beacon listener
    kontaktEmitter.addListener('didDiscoverDevices', ({ beacons }) => {
      console.log('didDiscoverDevices', beacons);

  render() {
    return <View />;

Run Example to test the module

  1. Clone this repository, connect an Android and/or Apple device to your computer and have some ( beacons handy

  2. Open a terminal window, bash to the Example/ folder, run npm install and start the react-native server

    $ cd react-native-kontaktio/Example
    $ npm install
    $ npm start
  3. Build the example and run it on your device. The app will appear under the name KontaktIoSimpleTest:

    • Android:

       $ react-native run-android
    • iOS

       $ react-native run-ios

Further notes

  • Beacons support is part of Android versions 4.3 and up. * So far the lowest Android version this library was tested on was a device with Android 4.4.2.
  • A physical device must be used for testing, at best some beacons.


  • Update Android Eddystone feature:

    • Add multiple Eddystone namespaces, i.e. add function setEddystoneNamespaces
    • Add Eddystone Frames Selection configuration option
  • iOS: Eddystone support (Corresponding PR to be merged soon)