Porterito-particle-firebase

A Nodejs app which connects to the Particle.io API, listen to a given event triggered by a Photon board and saves the data to Firebase.

Photon

Upload photon.cpp to your photon board, then connect a simple push switch using the D1 pin

How the code works? when the button is pushed it's publish the value defined for the variable to the Particle API.

Define the variable

 Particle.variable("btn_push", &btn_state, INT);

Set and publish the value when the button is pushed

if(pushButtonState == LOW){

    if  (btn_state == 0) {
        btn_state = 1;
        Particle.publish("btn_push", String(btn_state));
    } else if (btn_state == 1){
        btn_state = 0;
        Particle.publish("btn_push", String(btn_state));
    }
  }

Server

The listener.js sets an EventSource pointing to the Pariticle API endpoint.

var eventSource = new EventSource(API_URL + deviceID + "/events/?access_token=" + accessToken);

Add the a listener to the btn_push event

eventSource.addEventListener('btn_push', (e) => {
    let parsedData = JSON.parse(e.data)

    // POST en la base da datos de Firebase
    firebase.database().ref("sensor/btn_push").set(parsedData)
}, false)

Install dependencies

$ npm install

Setup Firebase and Particle API

Define your Particle API keys on the function

connectToParticle('TuDeviceID', 'TuAccessToken');

Initialize your Firebase app on index.html

<script>
    var config = {
        apiKey: "--",
        authDomain: "--",
        databaseURL: "--",
        storageBucket: "--",
        messagingSenderId: "--"
    };
    firebase.initializeApp(config);
</script>

Run

$ webpack
$ node app/server.js

Open in http://localhost:3006

Extra

Show the Firebase data on an Android App in real-time

https://github.com/juliocesar-io/porterito-android-firebase