react-native-kontaktio
v4.1.0
Published
React-native module for detecting [Kontakt.io](http://kontakt.io/) beacons. You have to own some Kontakt.io beacons, configure them via their managment console and have your api-key handy.
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react-native-kontaktio
Cross-platform React Native module for detecting beacons with Android and iOS devices.
Kontakt.io SDK Versions of newest release:
| OS | SDK Version | | :---------- | :--------------------------------------------------------------------------------------------------- | | Android | 7.0.6 | | iOS | 3.0.25 |
Advantages
- Works with any beacon (because the Kontakt.io SDK wraps the native beacon libraries (while adding more) - no Kontakt.io SDK API key is necessary.
- Especially useful with Kontakt.io 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 Kontakt.io online panel.
- Highly customizable configurations (e.g. for setting arbitrary monitoring intervals on Android)
Setup
API Documentation
Examples
Extensive Example
Minimal TypeScript Example
A minimal example (created with React Native v0.69.5 and TypeScript) with the default configuration and no specifically set regions. Thus, the default region everywhere
(i.e. all beacons) is automatically used.
- Follow the setup instructions carefully for
iOS
andAndroid
to installreact-native-kontaktio
for both platforms. - Start a new React Native TypeScript project (
npx react-native init BeaconTest --template react-native-template-typescript
) and replaceApp.tsx
with the example code below. - Run the app on a real device (
iOS
orAndroid
- not a simulator) - Check the React Native logs to see console statements containing incoming beacon signals.
import React, { useEffect } from 'react';
import {
Alert,
DeviceEventEmitter,
NativeEventEmitter,
PermissionsAndroid,
Platform,
SafeAreaView,
StatusBar,
StyleSheet,
Text,
View,
} from 'react-native';
import Kontakt, { KontaktModule } from 'react-native-kontaktio';
const {
connect,
init,
startDiscovery,
startRangingBeaconsInRegion,
startScanning,
} = Kontakt;
const kontaktEmitter = new NativeEventEmitter(KontaktModule);
const isAndroid = Platform.OS === 'android';
/**
* Android Marshmallow (6.0) and above need to ask the user to grant certain permissions.
* This function does just that.
*/
const requestLocationPermission = async () => {
try {
const granted = await PermissionsAndroid.request(
PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
{
title: 'Location Permission',
message:
'This example app needs to access your location in order to use bluetooth beacons.',
buttonNeutral: 'Ask Me Later',
buttonNegative: 'Cancel',
buttonPositive: 'OK',
}
);
if (granted === PermissionsAndroid.RESULTS.GRANTED) {
return true;
} else {
// permission denied
return false;
}
} catch (err) {
console.warn(err);
return false;
}
};
const beaconSetup = async () => {
if (isAndroid) {
// Android
const granted = await requestLocationPermission();
if (granted) {
await connect();
await startScanning();
} else {
Alert.alert(
'Permission error',
'Location permission not granted. Cannot scan for beacons',
[{ text: 'OK', onPress: () => console.log('OK Pressed') }],
{ cancelable: false }
);
}
} else {
// iOS
await init();
/**
* Will discover Kontakt.io beacons only
*/
await startDiscovery();
/**
* Works with any beacon(also virtual beacon, e.g. https://github.com/timd/MactsAsBeacon)
* Requires user to allow GPS Location (at least while in use)
*
* change to match your beacon values
*/
await startRangingBeaconsInRegion({
identifier: '',
uuid: 'A4826DE4-1EA9-4E47-8321-CB7A61E4667E',
major: 1,
minor: 34,
});
}
// Add beacon listener
if (isAndroid) {
/* works with any beacon */
DeviceEventEmitter.addListener(
'beaconsDidUpdate',
({ beacons, region }) => {
console.log('beaconsDidUpdate', { beacons, region });
},
);
} else {
/* works with Kontakt.io beacons only */
kontaktEmitter.addListener('didDiscoverDevices', ({ beacons }) => {
console.log('didDiscoverDevices', { beacons });
});
/* works with any beacon */
kontaktEmitter.addListener('didRangeBeacons', ({ beacons, region }) => {
console.log('didRangeBeacons', { beacons, region });
});
}
};
const App: React.FC = () => {
useEffect(() => {
Promise.resolve().then(beaconSetup);
return () => {
// remove event listeners
if (isAndroid) {
kontaktEmitter.removeAllListeners('beaconsDidUpdate');
} else {
kontaktEmitter.removeAllListeners('didDiscoverDevices');
kontaktEmitter.removeAllListeners('didRangeBeacons');
}
};
}, []);
return (
<SafeAreaView>
<StatusBar barStyle="dark-content" />
<View style={styles.wrapper}>
<Text style={styles.title}>react-native-kontaktio Example</Text>
<Text>Check console.log statements</Text>
</View>
</SafeAreaView>
);
};
const styles = StyleSheet.create({
wrapper: {
height: '100%',
justifyContent: 'center',
alignItems: 'center',
},
title: {
paddingVertical: 10,
fontSize: 30,
},
});
export default App;
Note (March 2020): The example in the Example/
folder is a bit outdated. If you want to try to run the example app anyway, here are some instructions to do so:
Clone this repository, connect an Android and/or Apple device to your computer and have some (Kontakt.io) beacons nearby.
Open a terminal window, bash to the
Example/
folder, runnpm install
and start the react-native server$ cd react-native-kontaktio/Example $ npm install $ npm start
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 and some beacons (Kontakt.io beacons to be able to use all features).
ToDo:
Update Android Eddystone feature:
- Add multiple Eddystone namespaces, i.e. add function
setEddystoneNamespaces
- Add Eddystone Frames Selection configuration option
- Add multiple Eddystone namespaces, i.e. add function
Contribute
Test library changes locally
Fork and clone this repository
Run
yarn
to install the dependenciesMake code changes
Delete
lib
folder if it exists and runyarn tsc
to compile the TypeScript files in the thelib
folder.In the
package.json
file of an example app point to the this directory, e.g."dependencies": { ... "react-native-kontaktio": "../react-native-kontaktio" },
Build and run on a real device
Upgrade to a new version of the Kontakt.io SDK
Android
In build.gradle
file change the version in the following line
implementation "io.kontakt.mvn:sdk:7.0.6"
iOS
- Go to the Kontakt.io SDK releases page and download the newest version of KontaktSDK.framework.zip.
- Replace the
ios/KontaktSDK.framework
folder of this library with theCocoapods/KontaktSDK/iOS/KontaktSDK.xcframework/ios-arm64_armv7/KontaktSDK.framework
folder which you find in the unzipped folder structure.