Arduino .pptx

arduino

1. Arduino Jayanthi M.G, Associate Professor, Department of CSE. CiTech

2. Arduino for beginners Arduino is a open-source It consists of a circuit board, which can be programed (referred to as a microcontroller) a a ready-made software called Arduino IDE

3. Features of Arduino Analog and Digital data Various sensor , actuator, led, cloud Control board through Arduino IDE USB C++, Packages

4. Board and IDE

5. Board Types Microcontrollers Common is IDE Difference is no of inputs and outputs Speed ,operating voltage.. etc .

6. Arduino Board description

7. Arduino Board description Power USB(1) Power(2) Voltage Regulator(3) Crystal Oscillator(4) Arduino Reset (17) Pins 6,7,8,9 (3.3,5 ,GND, Vin) Analog pins (10) Main Microcontroller (11)

8. Arduino Board description 9. ICSP pin (12) 10. Power LED indicator(13) 11. Tx and Rx LEDs(14) 12. Digital IO(15) 13. AREF (16)

9. Arduino installation Arduino board any type USB cable (A to B type) Download Arduino IDE software. Power up your board Launch Arduino IDE Open your first project

10. Arduino Program basic structure

11. Data Types in programming void Boolean char Unsigned char byte int Unsigned int word long Unsigned long short float double array String-char array String-object

12. Variable Scope Local Global Formal parameters

13. Arduino Control statements If If-else Switch Conditional Operators

14. Looping For Loop While Do---While

15. Function type int sum_func ( int x, int y) // function declaration { int z = 0; z = x+y ; return z; // return the value } void setup () { Statements // group of statements } void loop () { int result = 0 ; result = Sum_func (5,6) ; // function call }

16. Input Function pinMode ( pin,mode ) Mode- INPUT OUTPUT INPUT_PULLUP

17. digitalWrite Digital write function is used to write LOW or HIGH digitalWrite (pin, value) analogRead (pin ,value)

18. i nt button = 5 ; // button connected to pin 5 int LED = 6; // LED connected to pin 6 void setup () { pinMode (button , INPUT_PULLUP); // set the digital pin as input with pull-up resistor pinMode (button , OUTPUT); // set the digital pin as output } void setup () { If ( digitalRead (button ) == LOW) // if button pressed { digitalWrite (LED,HIGH); // turn on led delay(500); // delay for 500 ms digitalWrite (LED,LOW); // turn off led delay(500); // delay for 500 ms } }

19. LED blinking Components Required You will need the following components − 1 × Breadboard 1 × Arduino Uno R3 1 × LED 1 × 330Ω Resistor 2 × Jumper

20. Circuit diagram

21. Code to Blink LED void setup() { // initialize digital pin 13 as an output pinMode (2, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite (2, HIGH); delay(1000); // wait for a second digitalWrite (2, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }

22. PIR sensor Components Required You will need the following components − 1 × Breadboard 1 × Arduino Uno R3 1 × PIR Sensor (MQ3)

23. PIR sensor interface to arduino

24. PIR code #define pirPin 2 int calibrationTime = 30; long unsigned int lowIn ; long unsigned int pause = 5000; boolean lockLow = true; boolean takeLowTime ; int PIRValue = 0; void setup() { Serial.begin (9600); pinMode ( pirPin , INPUT); } void loop() { PIRSensor (); } void PIRSensor () { if( digitalRead ( pirPin ) == HIGH) { if( lockLow ) { PIRValue = 1; lockLow = false; Serial.println ("Motion detected."); delay(50); } takeLowTime = true; } if( digitalRead ( pirPin ) == LOW) { if( takeLowTime ){ lowIn = millis (); takeLowTime = false; } if(! lockLow && millis () - lowIn > pause) { PIRValue = 0; lockLow = true; Serial.println ("Motion ended."); delay(50); } } }

25. Arduino Ultra sonic Componenets 1 × Breadboard 1 × Arduino Uno R3 1 × ULTRASONIC Sensor (HC-SR04)

26. Ultra sonic code with Arduino const int pingPin = 7; // Trigger Pin of Ultrasonic Sensor const int echoPin = 6; // Echo Pin of Ultrasonic Sensor void setup() { Serial.begin (9600); // Starting Serial Terminal } void loop() { long duration, inches, cm; pinMode ( pingPin , OUTPUT); digitalWrite ( pingPin , LOW); delayMicroseconds (2); digitalWrite ( pingPin , , HIGH); delayMicroseconds (10); digitalWrite ( pingPin , LOW); pinMode ( echoPin , INPUT); duration = pulseIn ( echoPin , HIGH); Inches = microsecondsToInches (duration);

27. cm = microsecondsToCentimeters (duration); Serial.print (inches); Serial.print ("in, "); Serial.print (cm); Serial.print ("cm"); Serial.println (); delay(100); } long microsecondsToInches (long microseconds) { return microseconds / 74 / 2; } long microsecondsToCentimeters (long microseconds) { return microseconds / 29 / 2; }

28. Button to LED glow const int buttonPin = 8; // the number of the pushbutton pin const int ledPin = 2; // the number of the LED pin // variables will change: int buttonState = 0; // variable for reading the pushbutton status void setup() { // initialize the LED pin as an output: pinMode ( ledPin , OUTPUT); \ // initialize the pushbutton pin as an input: pinMode ( buttonPin , INPUT); } void loop() { // read the state of the pushbutton value: buttonState = digitalRead ( buttonPin ); // check if the pushbutton is pressed. // if it is, the buttonState is HIGH: if ( buttonState == HIGH) { // turn LED on: digitalWrite ( ledPin , HIGH); } else { // turn LED off: digitalWrite ( ledPin , LOW); } }