This document discusses building a smart IoT foosball table using an Arduino, Android app, and Firebase backend. Sensors on the foosball table feed real-time data to the Arduino, which then communicates with the Android app. The Android app and a Node.js Slackbot integrate with the Firebase backend to provide real-time updates and functionality. The hardware part of the project involves modifying the foosball table to add sensors and an Arduino.

2. Introduction to IoT Foosball
2

3. Electrical circuit
3
Gate A
Gate B

4. Arduino Firmware
4

5. Table modification
5

6. Platform IO
6

7. Introduction to Smart Foosball
7

8. Firebase - backend as service
8

9. Firebase Authentication
9

10. Firebase Realtime Database
10

11. Firebase Storage
11

12. Android app
12

13. Android and Firebase
13
1 public interface ChildEventListener {
2 void onChildAdded(DataSnapshot var1, String var2);
3
4 void onChildChanged(DataSnapshot var1, String var2);
5
6 void onChildRemoved(DataSnapshot var1);
7
8 void onChildMoved(DataSnapshot var1, String var2);
9
10 void onCancelled(DatabaseError var1);
11 }
1 DatabaseReference database;
2 database = FirebaseDatabase.getInstance().getReference();
3 DatabaseReference databaseReference = database.getRef().child("/games/");
…
…
…
30 databaseReference.addChildEventListener(childEventListener);

14. Slackbot
14

15. Digital Ocean
15

16. Let’s Encrypt
16

17. Botkit
17
1 var Botkit = require(‘botkit');
2
3 var slackBot = Botkit.slackbot({
4 debug: false
5 });
6
7 slackBot.spawn({
8 token: process.env.token
9 }).startRTM(function(err) {
10 if (err) {
11 throw new Error(err);
12 }
13 });
14
15 slackBot.hears(['game', 'play'], ['direct_message', 'direct_mention'], function (bot, message) {
16 bot.reply(message, "Cool, I'm in!");
17 });

18. Node.js and Firebase
18
1 var Firebase = require('firebase');
2 var firebaseDatabase = Firebase.database();
3
4 firebaseDatabase.ref('/games/').on('value', function (snapshot) {
5 console.log("Value is:");
6 console.log(JSON.stringify(snapshot.val(), "", 4));
7 });
8
9 firebaseDatabase.ref('/games/').on('child_added', function (snapshot) {
10 console.log("New child was added:");
11 console.log(JSON.stringify(snapshot.val(), "", 4));
12 });

19. Summary
Arduino
app
Android
Smart
Foosball IoT
Firebase Slackbot
19
Hardware part

20. Links
20
github - Smart Foosball IoT - https://github.com/handsomecode/smart-foosball-iot
Firebase - https://firebase.google.com
Platrom IO - http://platformio.org/
Digital Ocean - https://www.digitalocean.com/ (5 $ referral https://m.do.co/c/d7d609569ff4)
github - botkit - https://github.com/howdyai/botkit
Let’s encrypt - https://letsencrypt.org/
github - firebase autovalue - https://github.com/mattlogan/auto-value-firebase
Yandex speechkit - https://tech.yandex.com/speechkit/