1. Raspberry Internet Rover Dipto Pratyaksa www.linuxcircle.com

2. Why did I create this? Physical computing
Why did I create this?
Physical computing
I wondered how codes can be translated into movements and vice-versa
Sense the world via webcam and sensors

3. Why the Rover? Cat patrol
Why the Rover? Cat patrol
I want to stare at my cat at home while I'm at work

4. Why the Rover? Cat patrol
Why the Rover? Cat patrol
Watch her! Poke her! Run into her!

5. Plan it! Features: Move 8 directions + stop Light on / off Camera tilt
React to obstacles
Feed camera remotely
Access:
Controlled remotely via web browser

6. Key Ingredient 1: 4WD Chasis
Key Ingredient 1: 4WD Chasis
$45
4 motors
Battery Pack
2 layers of platform
3 stands / holders

7. Key Ingredient 2: DFRobot Romeo Controller
Key Ingredient 2: DFRobot Romeo Controller
$30
2 DC motor ports
5 Test buttons
Several IO ports
Power Supply input
Micro USB port

8. Key Ingredient 3: Raspberry Pi
Key Ingredient 3: Raspberry Pi

9. Key Ingredient 4: Power Supply
Key Ingredient 4: Power Supply
5 V
2 Amps
Micro USB port
Anything large enough to run for 3 hours
Be Eco-friendly: Solar Rechargeable

10. Key Ingredient 5: USB & other devices
Key Ingredient 5: USB & other devices
USB Hub 4-7 ports
Wipi = Wifi dongle
USB cables
Web cam
Led
Ultrasonic distance sensor

11.
Let's Cook!

12. Assemble this!

13. The Recipe Assemble the 4WD Chassis kit
The Recipe
Assemble the 4WD Chassis kit
Connect motors to Romeo via 4 motor ports
Connect Romeo to Raspberry Pi via USB port
Prep your USB devices
Prep your codes

14. Architecture The Controller: Arduino Script
Architecture
The Controller: Arduino Script
The Pi WebServer: NodeJS and PySerial
The Client: HTML with CoffeScript

15. Arduino Script http://www.linuxcircle.com/
void advance(char a,char b) //Move forward {
analogWrite (E1,a); //PWM Speed Control
digitalWrite(M1,HIGH);
analogWrite (E2,b);
digitalWrite(M2,HIGH);
direction = "forward"; }
void turn_L (char a,char b) //Turn Left {
analogWrite (E1,a);
digitalWrite(M1,LOW);
analogWrite (E2,b);
digitalWrite(M2,HIGH); }

16. http://www.linuxcircle.com/ if(Serial.available()){
char val = Serial.read();
if(val != -1) {
switch(val)
case 'w'://Move Forward
advance (200,200); //move forward in half (max speed 255)
Serial.println("Forward");
break;
case 'x'://Move Backward
back_off (175,175); //move back in slow spee
Serial.println("Reverse");
case 'a'://Turn Left
turn_L (255,255);
Serial.println("Left");
case 'd'://Turn Right
turn_R (255,255);
Serial.println("Right");

17. Datagram Server: Python Codes
Datagram Server: Python Codes
Open Serial Ports
Open Socket Connection on port: 9001
Listen for datagram commands from NodeJS
Send command to Arduino via Serial Ports

18. WebServer NodeJS Codes
Host Client HTML code
Listen for Socket connections on port 1338
Send instructions to Datagram Server on port 9001

19.
The Client

20. Implement Additional Features
Implement Additional Features
Webcam
Blinking light
Collision Detector
Beeper

21. Other Applications House Surveillance Hobby Toy Field Surveyor Spying
Driver-less transportation
Teach kids programming and robotics

22. Demo Log into the webserver 10.1.1.71:1338 via your smart phone!
Demo
Log into the webserver :1338 via your smart phone!

23. Questions Codes are available on: www.linuxcircle.com
Questions
Codes are available on: