Amazon Echo to Arduino Connection

We are using AWS lambda functions to update firebase. Then we will use an Arduino to carry out a task whenever anything on firebase changes.

IntermediateWork in progress1,287

Things used in this project

Hardware components

Amazon Alexa Amazon Echo

Arduino Yun

Raspberry Pi 2 Model B

Software apps and online services

Google Firebase

Amazon Web Services AWS Lambda

Story

Update 11/8: We are currently working on familiarizing ourselves with the Amazon Echo and how to use AWS lambda functions. We have already began by coding two basic Alexa Skills: a four function calculator and a word speller. We will soon begin trying to store data on firebase through AWS lambda functions.

Update 12/4: We have moved away from coding Alexa Skills and have started to work on storing data on firebase through AWS lambda functions.

Update 1/2: We are continuing to work on storing data on firebase through AWS lambda functions. We have finished the interaction module for the Skill.

Update 4/19: We have finished the storing data on firebase through the Amazon Echo. We are now working on reading data from firebase using Arduino. We have incorporated the Raspberry Pi for this part of the project and we are working on fixing wifi issues.

Update 5/31: We have completed our project. Below are pictures for our final product.

Amazon Web Services Lambda Function

Firebase Database

Python script using urllib2

Raspberry Pi with simple LED circuit

Final Raspberry Pi Code

Overall Flow Chart

Code

index.js

'use strict';
//https://stackoverflow.com/questions/37325775/amazon-lambda-to-firebase
//sice me
var firebase = require("firebase");

exports.handler = (event, context, callback) => {
    context.callbackWaitsForEmptyEventLoop = false;  //<---Important

    var config = {
    apiKey: "foo",
    authDomain: "foo",
    databaseURL: "foo",
    projectId: "foo",
    storageBucket: "foo",
    messagingSenderId: "foo"
};

if(firebase.apps.length == 0) {   // <---Important!!! In lambda, it will cause double initialization.
        firebase.initializeApp(config);
    }

var defaultDatabase = firebase.database();
// if(event.request.type) == "IntentRequest"{
//     if(event.request.intent.name) == "changeLightState"{
//         firebase.database().ref('lightState/').set({
//             state: event.request.intent.slots.command.value
//         });
//     }
// }
    
    if(event.request.intent.name == "changeLightState")
    var lState = event.request.intent.slots.command.value;
    firebase.database().ref('lightState/').set({
         state: lState
    });
    var response = "Mission Accomplished";
    var res = buildRes(response)

    setTimeout(function(){context.succeed(res);}, 1000);

}
//change the lambda function on the skill

// Helpers



function buildRes(response) {
    return {
        version: "1.0",
        "response": {
        "outputSpeech": {
            "type": "PlainText",
            "text": response,
            },
            "shouldEndSession": true
        }  
    } 

}