robotics

2. ESP32

3. Led blink
LED blink Code
#define led 2
void setup() {
// put your setup code here, to run once:
pinMode(led,OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(led,HIGH);
delay(1000);
digitalWrite(led,LOW);
delay(1000);
}

4. Ultrasonic
const int trigPin = 2;
const int echoPin = 4;
float duration, distance;
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
}
void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration*.0343)/2;
Serial.print("Distance: ");
Serial.println(distance);
delay(100);
}

5. LINE follower car
#define irPin1 2
#define irPin2 4
#define motorPin1 18
#define motorPin2 19
#define motorPin3 22
#define motorPin4 23
void setup() {
pinMode(irPin1,INPUT);
pinMode(irPin2,INPUT);
Serial.begin(9600);
pinMode(motorPin1,OUTPUT);
pinMode(motorPin2,OUTPUT);
pinMode(motorPin3,OUTPUT);
pinMode(motorPin4,OUTPUT);
}
void loop() {
if(irPin1){
Left();
}
else if(irPin2){
Right();
}
else if(irPin1 && irPin2){
Forward();
}
else{
Stop();
}
}

6. void Forward(){
digitalWrite(motorPin1,1);
digitalWrite(motorPin2,0);
digitalWrite(motorPin3,1);
digitalWrite(motorPin4,0);
}
void Left(){
digitalWrite(motorPin1,0);
digitalWrite(motorPin2,0);
digitalWrite(motorPin3,1);
digitalWrite(motorPin4,0);
}
void Right(){
digitalWrite(motorPin1,1);
digitalWrite(motorPin2,0);
digitalWrite(motorPin3,0);
digitalWrite(motorPin4,0);
}
void Stop(){
digitalWrite(motorPin1,0);
digitalWrite(motorPin2,0);
digitalWrite(motorPin3,0);
digitalWrite(motorPin4,0);
}

7. Bluetooth Car
#include "BluetoothSerial.h"
BluetoothSerial SerialBT;
char receivedChar;// received value will be stored as CHAR in this
variable
#define Motor_Pin1 23
#define Motor_Pin2 22
#define Motor_Pin3 19
#define Motor_Pin4 18
void setup() {
Serial.begin(9600);
SerialBT.begin("Team 2"); //type your team number
pinMode(Motor_Pin1,OUTPUT);
pinMode(Motor_Pin2,OUTPUT);
pinMode(Motor_Pin3,OUTPUT);
pinMode(Motor_Pin4,OUTPUT);
}

8. void loop() {
if (SerialBT.available()) {
receivedChar = SerialBT.read();
Serial.print ("Received:");//print on serial monitor
Serial.println(receivedChar);//print on serial monitor
if(receivedChar == 'F')
{
Forward();
}
if(receivedChar == 'B')
{
Back();
}
if(receivedChar == 'L')
{
Left();
}
if(receivedChar == 'R')
{
Right();
}
if(receivedChar == 'S')
{
Stop();
}
}
delay(20);
}

9. void Forward(){
digitalWrite(Motor_Pin1,1);
digitalWrite(Motor_Pin2,0);
digitalWrite(Motor_Pin3,1);
digitalWrite(Motor_Pin4,0);
}
void Left(){
digitalWrite(Motor_Pin1,0);
digitalWrite(Motor_Pin2,0);
digitalWrite(Motor_Pin3,1);
digitalWrite(Motor_Pin4,0);
}
void Right(){
digitalWrite(Motor_Pin1,1);
digitalWrite(Motor_Pin2,0);
digitalWrite(Motor_Pin3,0);
digitalWrite(Motor_Pin4,0);
}
void Stop(){
digitalWrite(Motor_Pin1,0);
digitalWrite(Motor_Pin2,0);
digitalWrite(Motor_Pin3,0);
digitalWrite(Motor_Pin4,0);
}
void Back(){
digitalWrite(Motor_Pin1,0);
digitalWrite(Motor_Pin2,1);
digitalWrite(Motor_Pin3,0);
digitalWrite(Motor_Pin4,1);
}

10. Search Arduino Iot Cloud

11. Click On Arduino
Cloud -Home Page

12. Click On Get Started

13. Click On Sign In

14. Click On Iot Cloud

15. Click On Create Thing

16. Click On Add Variable

17. Write led in name
Select bool in Declaration
Click on Read & Write
Click on “on change”
Click on Add Variable

18. Click On Select Device

19. Click On Set Up new
Device

20. Click On Set up a
3rd party device

21. Click On ESP32

22. Search v1 and Select DOIT ESP32

23. Click On Continue

24. Write any name

25. Click On Done

26. Click On Dashboards

27. Click On BUILD
DASHBOARD

28. Click On ADD

29. Click On Switch

30. Click On Link Variable

31. Click On led

32. Click On Link Variable

33. Click On Done

34. #include <ArduinoIoTCloud.h>
#include <Arduino_ConnectionHandler.h>
#define ledPin 2
const char DEVICE_LOGIN_NAME[] = ""; //enter your device login name from pdf
const char DEVICE_KEY[] = ""; // enter your device key from pdf
const char SSID[] = ""; //enter your mobile hotspot name
const char PASS[] = ""; //enter your hotspot password
bool led;
bool status = false;
void onLedChange();
WiFiConnectionHandler ArduinoIoTPreferredConnection(SSID, PASS);
void setup() {
Serial.begin(9600);
initProperties();
ArduinoCloud.begin(ArduinoIoTPreferredConnection);
setDebugMessageLevel(2);
ArduinoCloud.printDebugInfo();
pinMode(ledPin,OUTPUT);
}

35. void loop() {
ArduinoCloud.update();
if(!status){
if(ArduinoCloud.connected()){
digitalWrite(ledPin,HIGH);
delay(5000);
digitalWrite(ledPin,LOW);
status=true;
}
}
}
void onLedChange() {
if(led==true){
digitalWrite(ledPin,HIGH);
Serial.write("led on");
}
else{
digitalWrite(ledPin,LOW);
Serial.write("led off");
}
}
void initProperties(){
ArduinoCloud.setBoardId(DEVICE_LOGIN_NAME);
ArduinoCloud.setSecretDeviceKey(DEVICE_KEY);
ArduinoCloud.addProperty(led, READWRITE, ON_CHANGE, onLedChange);
}

36. Copy Device ID

37. Paste Device ID

38. Copy Secret Key

39. Paste Key

40. Enter hotspot name and pass.

41. Click on Library manager

42. Search ArduinoIot

43. Install ArduinoIoTCloud.h

44. Install Arduino_ConnectionHandler.h

45. Upload The Code