Tra i sistemi di sicurezza anti-intrusione o anti-taccheggio già presenti sul mercato, senza dubbio questo progetto rappresenta una soluzione low-cost, di facile utilizzo e configurazione. Individuata nell’Arduino Yún la board che rappresenti il cuore del sistema embedded, è stato necessario selezionare i giusti sensori atti ad ottenere un giusto equilibrio tra l’utilizzo in un ambiente reale (sia domestico che lavorativo) e il contenimento dei costi. Grazie all’Arduino IDE si è resa possibile la stesura del codice Sketch che, attraverso la coordinazione di sensori, un display LCD e la Choreo SendEmail di Temboo, permette la messa in sicurezza di un'area ben definita. Video: https://youtu.be/1IioQDRjlNA

1. University of Messina
Department of Engineering
Course in Engineering and Computer Science (ECS)
B.Sc. CASALE GIUSEPPE
Project for Embedded System
System Security with Arduino Yún:
“ Stay Away From Me! ”
peppecasale@virgilio.it

2. Use scenario:
Pedestal in an exhibition
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
● Short messages are displayed on the LCD according to the area of interest.
● In “Allarme”, an Alert is sent by e-mail through the Temboo service.

3. START
Welcome Message
Sensors Calibration
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
Motion
Detected?
SI
In which Direction?
I Orient the Servo
I Calculate the Distance
and Act Accordingly
END
Anyway, I Calculate
the Distance from a
Possible Object
No

4. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
DIAGRAM OF OPERATION...PROJECT

5. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
DIAGRAM OF OPERATION...TEMBOO
Source: https://temboo.com/

6. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
● 1x Board Arduino Yún rel. 4;
● 1x Breadboard;
● 2x HC-SR501 PIR;
● 2x 10 Kohms Resistor with +/- 5% tolerance;
● 1x 2004A LCD Display with 20x4 characters available;
● 1x 220 ohms Resistor with +/- 5% tolerance;
● 1x Potentiometer;
● 1x SG90 Servo-motor;
● 1x 100 μF Condenser;
● 1x HC-SR04 Ultrasonic Sensor;
● Different wires;
Components Used:

7. ARDUINO YúN
Heart of the entire system!!!
Provided with: Microcontroller, Microprocessor, wired or wireless network
connectivity, pins to communicate with the outside world, micro-SD and much more...
Source:
http://arduino.cc/en/Main/ArduinoBoardYun
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it

8. PIR SENSOR (Pyroelectric InfraRed)
How does it work? It detects, through 2 slots, the infrared emission produced by an object!
Datasheet:
http://www.datasheet-pdf.info/entry/HC-SR501-Datasheet-PDF
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it

9. The magic happens with the Fresnel lens.
The Principle: How it happens: How we see it!
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
https://it.wikipedia.org/wiki/Lente_di_Fresnel

10. 20x4 LCD Display
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
● Interaction with the external environment through messages;
● To write a character you need to:
1. Make sure the cursor is at the point where you want to print the
character;
2. Set to 1 the R / S pin and to 0 the R / W pin;
3. Send the corresponding ASCII character code;
4. Set to 1 the E pin for at least 450 nanoseconds and then
back to 0.
● Do you want it to be easy???
Use the liquidCrystal LIBRARY
[ https://www.arduino.cc/en/Reference/LiquidCrystal ]

11. 20x4 LCD Display
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
Time of sensors calibration: do I see the countdown???
Please...I use the ALIEN!!!
How can I make animation on a text display???

12. TAITO’S ALIEN
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
Easy:
I draw the Pixels...
...I recall them to make an ANIMATION!

13. The ultrasonic sensor: HC-SR04
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
When the sound waves encounter the separation interface between two material
means, they give rise to phenomena such as refraction and reflection.

14. The ultrasonic sensor: HC-SR04
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
It uses the concept of sonar to determine the distance to an object,
as bats or dolphins.
Datasheet: https://docs.google.com/document/d/1Y-yZnNhMYy7rwhAgyL_pfa39RsB-x2qR4vP8saG73rE/edit.

15. SG90 Servo
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
Within the servomotors, there are several mechanical and electronic parts. Here's a list:
● DC Motor -> Moves the wheels;
● Potentiometer -> Generates a resistive value proportional to the angle of the current position;
● Control electronics (feedback system) -> decides the direction of the rotation;
● Motor driver (power stage) -> Feeds the motor correctly;
● Set of gears and gear reduction mechanism -> These are used to increase the accuracy, reduce
the inertia and increase the torque;
SG90 9g Micro Servo:
http://www.micropik.com/PDF/SG90Servo.pdf

16. COMPLETE REALIZATION OF THE CIRCUIT
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it

17. TEMBOO x E-MAIL
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
● It provides a unified access to more than 100 web services,
including the ability to send emails;
● Key words: TembooChoreo and SendEmailChoreo;
● Input Parameters for the Choreo:
1. (“Username”, GMAIL_USER_NAME): this is the username of the Gmail
account, which also corresponds to the email address of the Sender,
formatted as a full email address;
2. (“Password”, GMAIL_APP_PASSWORD): this allows a user that uses
the two-step verification to access to his/her Google Account through
unofficial applications. It is generated automatically, immediately after
entering the security code provided by the Google Authenticator App [ ], in
the Auth phase of the creation of the application;
3. (“ToAddress”, TO_EMAIL_ADDRESS): this is the email address of the
Recipient;
4. (“Subject”, “Testo_Personalizzabile”): it represents the voice OBJECT in the
header of an email. The User can insert the text he/she prefers instead of
Testo_Personalizzabile;
5. (“MessageBody”, “Testo_Personalizzabile” ): the text inserted by the User
will be the BODY of the email instead of Testo_Personalizzabile;

18. “TembooAccount.h”
CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
● Key word: SECURITY!!!
● External file for sensitive data of the
Temboo and Gmail Account;
● Parameters:
1. TEMBOO_ACCOUNT: this is the name
associated to the Temboo account;
2. TEMBOO_APP_KEY_NAME: this is the
name of the key associated to the project, in
this case “TiHoVisto” (I’ve Seen You);
3. TEMBOO_APP_KEY: this is the univocal
key generated by Temboo for the particular
App;
4. GMAIL_USER_NAME: this is the username,
formatted as a complete email address, of
the Gmail account of the sender;
5. GMAIL_APP_PASSWORD: this is the
password of the sender’s account codified
in base64;
6. TO_EMAIL_ADDRESS: this is the email
address of the recipient of the Alert;

19. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
REFERENCE
[1] Arduino Yun official page: http://arduino.cc/en/Main/ArduinoBoardYun.
[2] Wikipedia page: Breadboard: https://it.wikipedia.org/wiki/Breadboard.
[3] Datasheet PIR HC-SR501 sensor: http://www.datasheet-pdf.info/entry/HC-SR501-Datasheet-PDF.
[4] Shenzhen Eone Electronics CO.,LTD. Specification For LCD Module 2004A:
https://www.beta-estore.com/download/rk/RK-10290_410.pdf
[5] Micropic.com - SG90 9g Micro Servo: http://www.micropik.com/PDF/SG90Servo.pdf.
[6] Cytron Technology. Product User’s Manual – HC-SR04 Ultrasonic Sensor:
https://docs.google.com/document/d/1Y-yZnNhMYy7rwhAgyL_pfa39RsB-x2qR4vP8saG73rE/edit.
[7] Arduino official page. http://arduino.cc/
[8] Wiring official page. http://wiring.org.co/ .
[9] Processing official page. https://processing.org/ .
[10] Community Arduino official page: https://forum.arduino.cc/
[11] Dario Bruneo. Embedded Systems slide part 3: The Arduino Yún Board, 2014.
[12] 8-bit avr microcontroller with 16/32k bytes of isp ash and usb controller. ATmega16U4 and ATmega32U4:
http://www.atmel.com/Images/Atmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf.

20. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
[13] Datasheet for Qualcomm Atheros AR9331:
https://www.atheros-drivers.com/qualcomm-atheros-download-datasheets-nr-110-with-code-4351.html .
[14] OpenWrt official page: https://openwrt.org/ .
[15] Linino official page: http://www.linino.org/ .
[16] cURL official page: http://curl.haxx.se/ .
[17] Python scripting language official page. https://www.python.org/ .
[18] Bridge Library official page. http://arduino.cc/en/Tutorial/Bridge/ .
[19] EEPROM Library official page. https://www.arduino.cc/en/Reference/EEPROM/ .
[20] Wire Library official page. http://arduino.cc/en/Reference/Wire/ .
[21] SPI Library official page. http://arduino.cc/en/Reference/SPI/ .
[22] LiquidCrystal Library official page. https://www.arduino.cc/en/Reference/LiquidCrystal/ .
[23] Wikipedia page on HD44780: https://it.wikipedia.org/wiki/HD44780/ .
[24] Servo Library official page: https://www.arduino.cc/en/Reference/Servo/ .
[25] NewPing Library official page: http://playground.arduino.cc/Code/NewPing/ .
[26] Wikipedia page on Taito’s Space Invaders: https://it.wikipedia.org/wiki/Space_Invaders/ .

21. CASALE GIUSEPPE - Engineering and Computer Science - ECS UNIME - peppecasale@virgilio.it
Credits:
Dr. Giuseppe Casale
E-mail: peppecasale@virgilio.it
Tel.: 340.095.33.86
Fb.com/Giuseppe.Casale01
https://youtu.be/1IioQDRjlNA