React Native Mqtt

This package is a wrapper around the javascript implementation of the paho mqtt client library to provide drop in compatibility with react native. If you happen to be running your own mqtt broker, it must support websockets for a connection to be possible.

Install

To install, use npm:

npm install react_native_mqtt --save

Usage

To use the library just pass in the options for the local storage module (react-native-storage) and the paho object will be attached to global scope.

import init from 'react_native_mqtt';
import { AsyncStorage } from 'react-native';
 
init({
  size: 10000,
  storageBackend: AsyncStorage,
  defaultExpires: 1000 * 3600 * 24,
  enableCache: true,
  reconnect: true,
  sync : {
  }
});
 
function onConnect() {
  console.log("onConnect");
}
 
function onConnectionLost(responseObject) {
  if (responseObject.errorCode !== 0) {
    console.log("onConnectionLost:"+responseObject.errorMessage);
  }
}
 
function onMessageArrived(message) {
  console.log("onMessageArrived:"+message.payloadString);
}
 
const client = new Paho.MQTT.Client('iot.eclipse.org', 443, 'uname');
client.onConnectionLost = onConnectionLost;
client.onMessageArrived = onMessageArrived;
client.connect({ onSuccess:onConnect, useSSL: true });

Example

To run the example, first make sure you have properly setup your env for react native development in ios and/or android: https://facebook.github.io/react-native/releases/0.21/docs/getting-started.html.

Then start the tsc compiler to watch and re-build changes, start up the js packager, and run android or ios.

cd /react-native-mqtt/
yarn
yarn run dev

cd /react-native-mqtt/example/
yarn
yarn start --reset-cache

cd /react-native-mqtt/example/
react-native run-android OR react-native run-ios

Lastly, once you have the example running, you can use this web app to verify that everything works as expected by publishing messages to the "WORLD" topic, using the config below.

Host: iot.eclipse.org
Port: 443
SSL: true