kjnikhil6 / iot

Hi

I'm NIKHIL KJ,Undergraduate @ GEC PKD

LEVEL 1:

Expt 1:LED Blinking

int ledPin = 4;
void setup() {
  pinMode(ledPin,OUTPUT);
}

void loop() {
  digitalWrite(ledPin,HIGH);
  delay(1000);
  digitalWrite(ledPin,LOW);
  delay(1000);
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/JToYQKcGWNk" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 2:Traffic Light

int rLED = 13;
int yLED = 8;
int gLED = 2;
int i;
void setup() {
  pinMode(rLED,OUTPUT);
  pinMode(yLED,OUTPUT);
  pinMode(gLED,OUTPUT);
}

void loop() {
  digitalWrite(gLED,HIGH);
  delay(5000);
  digitalWrite(gLED,LOW);
  
  for(i=0;i<3;i++){
    delay(500);
    digitalWrite(yLED,HIGH);
    delay(500);
    digitalWrite(yLED,LOW);
  }
  delay(500);
  digitalWrite(rLED,HIGH);
  delay(5000);
  digitalWrite(rLED,LOW);
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/Wa89EvzFB1U" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 3:LED Chasing Effect

int BASE =2;
int NUM =5;
int dTime=200;

void CHASING(int POWER){
  for(int i =BASE;i<BASE+NUM;i++){
    digitalWrite(i,POWER);
    delay(dTime);
  }
}
void setup() {
  // put your setup code here, to run once:
  for(int i =BASE;i<BASE+NUM;i++){
    pinMode(i,OUTPUT);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  
  CHASING(HIGH);
  CHASING(LOW);

}

<iframe width="560" height="315" src="https://www.youtube.com/embed/sk6itZsqzhE" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 4:Button Controlled LED

int readPIN = 8;
int ledPIN  = 12;

void setup() {
  //pinMode(readPIN,INPUT_PULLUP);
  pinMode(readPIN,INPUT);
  pinMode(ledPIN,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int readVal;
  readVal = digitalRead(readPIN);
  Serial.println(readVal);
  if(readVal)
    digitalWrite(ledPIN,HIGH);
  else
    digitalWrite(ledPIN,LOW);
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/T9m9NT8zQqs" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 5:Buzzer

int buzzPin = 12;
void setup() {
  pinMode(buzzPin,OUTPUT);
}

void loop() {
  digitalWrite(buzzPin,HIGH);
  delayMicroseconds(1000);
  digitalWrite(buzzPin,LOW);
  delayMicroseconds(1000);
}

Expt 6:RGB LED

String color;
int RedL=3;
int GreenL=6;
int  BlueL=9;
String msg ="Enter the color:";

void RGB(int R, int G , int B){
   analogWrite(RedL,R);
   analogWrite(GreenL,G);
   analogWrite(BlueL,B);
   delay(1200);
}
void setup() {
pinMode(RedL,OUTPUT);
pinMode(GreenL,OUTPUT);
pinMode(BlueL,OUTPUT);
Serial.begin(9600);
}

void loop() {
  //RED
  RGB(255,0,0);
  //GREEN
  RGB(0,255,0);
  //BLUE
  RGB(0,0,255);
  //CYAN
  RGB(0,255,255);
  //YELLOW
  RGB(255,255,0);
  //magenta
  RGB(255,0,255);
  //WHITE
  RGB(255,255,255);
  //
  RGB(125,255,10);
  //
  RGB(170,200,50);
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/NKEFPGZ-0GU" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 7:LDR

int LDrPin=8;
int ledPin=12;
int buzzPin= 7;

void setup() {
  Serial.begin(9600);
  pinMode(LDrPin,INPUT);
  pinMode(ledPin,OUTPUT);
  pinMode(buzzPin,OUTPUT);
}

void loop() {

  int LDrVal;
  digitalWrite(ledPin,LOW);
  int dt=155;
  LDrVal=digitalRead(LDrPin);
  Serial.println(LDrVal);

  while(LDrVal){
    digitalWrite(ledPin,HIGH);
    
    digitalWrite(buzzPin,HIGH);
    delay(dt);
    digitalWrite(buzzPin,LOW);
    delay(dt);
    LDrVal=digitalRead(LDrPin);
  }
  
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/QuOpklLrG78" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 8: Flame Sensor

int Flame = A0;
int Buzzer =8;

void setup() {
  pinMode(Flame,INPUT);
  pinMode(Buzzer,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  
  int flameVAL = analogRead(Flame);
  Serial.println(flameVAL);
  if(flameVAL> 600)
    digitalWrite(Buzzer,HIGH);
  else
    digitalWrite(Buzzer,0);
  delay(500);

}

<iframe width="560" height="315" src="https://www.youtube.com/embed/zzLf0j56xfw" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 9:Temperature Sensor LM35

int temp = A0;

void setup() {
  pinMode(temp,INPUT);
  Serial.begin(9600);
}

void loop() {
  
  int val = analogRead(temp);
  int dat;// define variable
  val=analogRead(0);
  dat=(125*val)>>8;// temperature calculation formula
  Serial.print("Temp ");
  Serial.print(dat);
  Serial.println(" C");
  delay(500);
}

Expt 10: IR Remote

#include <IRremote.h>
int RECV_PIN = 3;
int LED1 = 8;
int LED2 = 9;
int LED3 = 10;
int LED4 = 11;

const unsigned long LED1_IR = 0x00C0006D;
const unsigned long LED2_IR = 0xC0006E;
const unsigned long LED3_IR = 0xC0006F;
const unsigned long LED4_IR = 0xC00070;
const unsigned long TOGGLE_IR = 0xC0000C;

IRrecv irrecv(RECV_PIN);
decode_results results;

void dump(decode_results results) {
  switch (results.decode_type) {
    case NEC:
      Serial.println("NEC");
      break;
    case SONY:
      Serial.println("SONY");
      break;
    case RC5:
      Serial.println("RC5");
      break;
    case RC6:
      Serial.print("RC6:");
      break;
    case DISH:
      Serial.print("DISH:");
      break;
    case SHARP:
      Serial.print("SHARP:");
      break;
    case JVC:
      Serial.print("JVC:");
      break;
    case SANYO:
      Serial.print("SANYO:");
      break;
    case MITSUBISHI:
      Serial.print("MITSUBISHI:");
      break;
    case SAMSUNG:
      Serial.print("SAMSUNG:");
      break;
    case LG:
      Serial.print("LG:");
      break;
    case WHYNTER:
      Serial.print("WHYNTER:");
      break;
    case AIWA_RC_T501:
      Serial.print("AIWA_RC_T501:");
      break;
    case PANASONIC:
      Serial.print("PANASONIC:");
      break;
    case DENON:
      Serial.print("DENON:");
      break;
    default:
    case UNKNOWN:
      Serial.print("UNKNOWN:");
      break;
  }
  Serial.print(results.value, HEX);
  Serial.print(" (");
  Serial.print(results.bits, DEC);
  Serial.println(" bits)");
}

void lights(int a,int b,int c,int d){
  digitalWrite(LED1,a);
  digitalWrite(LED2,b);
  digitalWrite(LED3,c);
  digitalWrite(LED4,d);
}

void setup()
{
  pinMode(RECV_PIN, INPUT);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(13, OUTPUT);
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}
int on = 0;
unsigned long last = millis();
void loop()
{
  if (irrecv.decode(&results))
  {
    // If it's been at least 1/4 second since the last
    // IR received, toggle the relay
    if (millis() - last > 250)
    {
      on = !on;
      digitalWrite(13, on ? HIGH : LOW);
      dump(results);
    }
    

    switch (results.value){
      case LED1_IR :
            Serial.print(results.value);
            lights(1,0,0,0);
            break;
      case LED2_IR :
            lights(0,1,0,0);
            break;
      case LED3_IR :
            lights(0,0,1,0);
            break;
      case LED4_IR :
            lights(0,0,0,1);
            break;
      case TOGGLE_IR :
            lights(on,on,on,on);
            break;
            
    }



    last = millis();
    irrecv.resume(); // Receive the next value
  }
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/S8j5t4o1oxc" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 11:POTENTIOMETER

int potVal;
int potPin=A0;
int ledPin=11;
float ledV;
float ledVal;

float potV2ledV(int potV){
  ledV=(255./1023.)*potV;
  return ledV;
}
void setup() {
  Serial.begin(9600);
  pinMode(potPin,INPUT);
  pinMode(ledPin,OUTPUT);
}
void loop() {
  potVal=analogRead(potPin);
  Serial.println(potVal);
  ledVal = potV2ledV(potVal);
  Serial.println(ledVal);
  Serial.println("--------------");
  analogWrite(ledPin,ledVal);  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/dhxAwZ74s28" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 12: 7 Segment Display

int g = 12;
int f = 11;
int e = 10;
int d = 9;
int c = 8;
int b = 7;
int a = 6;
int dp = 5;


void digital_0(void) // display number 5
{
unsigned char j;
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,LOW);
digitalWrite(dp,LOW);
}
void digital_1(void)
{// display number 1
digitalWrite(a,LOW);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,LOW);
digitalWrite(e,LOW);
digitalWrite(f,LOW);
digitalWrite(g,LOW);
digitalWrite(dp,LOW);
}
void digital_2(void) // display number 2
{
unsigned char j;
digitalWrite(b,HIGH);
digitalWrite(a,HIGH);
for(j=9;j<=12;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
digitalWrite(c,LOW);
digitalWrite(f,LOW);
}
void digital_3(void) // display number 3
{
 digitalWrite(g,HIGH);
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(dp,LOW);
digitalWrite(f,LOW);
digitalWrite(e,LOW);
}
void digital_4(void) // display number 4
{
 digitalWrite(c,HIGH);
digitalWrite(b,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
digitalWrite(dp,LOW);
digitalWrite(a,LOW);
digitalWrite(e,LOW);
digitalWrite(d,LOW);
}
void digital_5(void) // display number 5
{
digitalWrite(a,HIGH);
digitalWrite(b, LOW);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e, LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
digitalWrite(dp,LOW);
}
void digital_6(void) // display number 6
{
unsigned char j;
for(j=7;j<=11;j++)
digitalWrite(j,HIGH);
digitalWrite(c,HIGH);
digitalWrite(dp,LOW);
digitalWrite(b,LOW);
}
void digital_7(void) // display number 7
{
unsigned char j;
for(j=6;j<=8;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
for(j=9;j<=12;j++)
digitalWrite(j,LOW);
}
void digital_8(void) // display number 8
{
unsigned char j;
for(j=6;j<=12;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
}
void digital_9(void) // display number 5
{
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e, LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
digitalWrite(dp,LOW);
}
void setup()
{
  int i;// set variable
  for(i=5;i<=12;i++)
  pinMode(i,OUTPUT);// set pin 5-12 as “output”
}

void loop()
{
while(1)
{
digital_0();
delay(1000);
digital_1();
delay(1000);
digital_2();
delay(1000);
digital_3();
delay(1000); 
digital_4();
delay(1000); 
digital_5();
delay(1000); 
digital_6();
delay(1000); 
digital_7();
delay(1000);
digital_8();
delay(1000); 
digital_9();
delay(1000); 
}}

<iframe width="560" height="315" src="https://www.youtube.com/embed/OtOnRjMkYkE" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt #:Toggle Switch

int readPIN = 8;
int ledPIN  = 12;

void setup() {
  //pinMode(readPIN,INPUT_PULLUP);//press =0
  pinMode(readPIN,INPUT);
  pinMode(ledPIN,OUTPUT);
  Serial.begin(9600);
}


bool prevVal = HIGH; 
bool prev_readVal;
void loop() {
  bool readVal;
  readVal = digitalRead(readPIN);
  delay(50);
  if(readVal & !prev_readVal){ // 0 to 1 transition
     digitalWrite(ledPIN, prevVal);
     prevVal = !prevVal;
    }
  prev_readVal=readVal;   
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/0aEnn13wK4Q" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt #: Button Controlled dimmable LED

int readPIN_up = 11;
int readPIN_down = 12;
int ledPIN  = 9;

int BrightVal=0;

void setup() {
  pinMode(readPIN_up,INPUT_PULLUP);
  pinMode(readPIN_down,INPUT_PULLUP);
  pinMode(ledPIN,OUTPUT);
  Serial.begin(9600);
}


void loop() {

  int dt =50;
  
  int readVal_up;
  readVal_up=digitalRead(readPIN_up);
  delay(dt);
  
  int readVal_down;
  readVal_down=digitalRead(readPIN_down);
  delay(dt);
  
  if(!readVal_up){
    if(BrightVal != 255){
      BrightVal += 17;
      Serial.println(BrightVal);
      analogWrite(ledPIN,BrightVal);
    }
  }
  
  if(!readVal_down){
    if(BrightVal != 0){
      BrightVal-= 17;
      Serial.println(BrightVal);
      analogWrite(ledPIN,BrightVal);
    }
  }
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/lTaUh4BUp1A" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

ASSIGNMENT 1 : THERMOMETER

int temp = A0;
int LED1=8;
int LED6=13;
void setup() {
  pinMode(temp,INPUT);
  for(int i=LED1;i<=LED6;++i){
    pinMode(i,OUTPUT);
  }
  Serial.begin(9600);
}

void ledOn(int led){
   for(int i=LED1;i<=LED1+led;++i){
   digitalWrite(i,HIGH);
  }
}

void thermometerScale(float temp){
 if(temp<-13.32)
    ledOn(0);
  else if(temp<20.68)
    ledOn(1);
  else if(temp<47.48)
    ledOn(2);
  else if(temp<81.64)
    ledOn(3);
  else if(temp<115.80)
    ledOn(4);
  else if(temp<149)
    ledOn(5);
  else 
    ledOn(6);
    
}


void loop() {
  
  int val = analogRead(temp);
  float dat;// define variable
  val=analogRead(0);
  dat=(125*val)>>8;// temperature calculation formula
  Serial.print("Temp ");
  Serial.print(dat);
  Serial.println(" C");
  thermometerScale(dat);
  delay(5000);
}

ASSIGNMENT 2 : DIGITAL DICE

int buttonPin = 7;
int LED1=8;
int LED6=13;

void rolling(){//CHASING EFFECT
   for(int pin=LED1;pin<=LED6;++pin){
   digitalWrite(pin,HIGH);
   delay(100);
  }
  for(int pin=LED6;pin>=LED1;--pin){
   digitalWrite(pin,LOW);
   delay(100);
  }
}

void displayResult(int number){
  for(int i=LED1;i<LED1+number;++i){
    digitalWrite(i,HIGH);
    delay(50);
  }
}

void setup() {
  for (int i=LED1;i<=LED6;++i){
    pinMode(i,OUTPUT);
  }
  pinMode(buttonPin,INPUT_PULLUP);
  Serial.begin(9600);
  randomSeed(analogRead(0));
}
void loop() { 
  if(!digitalRead(buttonPin)){//IF THE BUTTON IS PRESSED
    
    for(int i=0;i<=3;++i){    // ROLLING EFFECT
      rolling();            
    }
    displayResult(random(1,7)); //DISPLAY RESULT
  } 
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/KFgrftnXKk8" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

LEVEL 2:

Expt : Ultrasonic Sensor(Blynk):

#define BLYNK_TEMPLATE_ID "TMPL7LjrPPdu"
#define BLYNK_DEVICE_NAME "ULTRASONIC SENSOR"

#define BLYNK_FIRMWARE_VERSION        "0.1.0"

#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG

#define APP_DEBUG

// Uncomment your board, or configure a custom board in Settings.h
//#define USE_WROVER_BOARD
//#define USE_TTGO_T7
//#define USE_ESP32C3_DEV_MODULE''J  
//#define USE_ESP32S2_DEV_KIT


#define trigPin 13
#define echoPin 12

float duration, distance;


#include "BlynkEdgent.h"
BlynkTimer timer;

double UltraSonic_distance()
{
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
 
 
  duration = pulseIn(echoPin, HIGH);
  
  // Use 343 metres per second as speed of sound
  
  distance = (duration / 2) * 0.0343;
  
 
  Serial.print("Distance = ");
  if (distance >= 400 || distance <= 2) {
     Serial.println("Out of range");
  }
  else {
    Serial.print(distance);
    Serial.println(" cm");
    delay(500);
  }
  delay(500);
  return distance;
}


void sendSensor()
{
  double dist = UltraSonic_distance();

  if (isnan(dist)) {
    Serial.println("Failed to read from hcsr04 sensor!");
    return;
  }
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V0, dist);
  
}



void setup()
{
  Serial.begin(115200);
  delay(100);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  BlynkEdgent.begin();
  timer.setInterval(1000L, sendSensor);
}

void loop() {
  BlynkEdgent.run();
  timer.run();
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/qy43WxsqTMA" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt #: LED on/off via Blynk:

#define BLYNK_TEMPLATE_ID "*****"
#define BLYNK_DEVICE_NAME "LED Blink"

#define BLYNK_FIRMWARE_VERSION        "0.1.0"

#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG

#define APP_DEBUG

// Uncomment your board, or configure a custom board in Settings.h
//#define USE_WROVER_BOARD
//#define USE_TTGO_T7
//#define USE_ESP32C3_DEV_MODULE
//#define USE_ESP32S2_DEV_KIT

#include "BlynkEdgent.h"

BLYNK_WRITE(V0)
{
  int pinValue = param.asInt();
  digitalWrite(13,pinValue);
}

void setup()
{
  Serial.begin(115200);
  delay(100);
  pinMode(13,OUTPUT);

  BlynkEdgent.begin();
}

void loop() {
  BlynkEdgent.run();
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/pIbwQVhK8ic" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt 3: LIGHT METER(Arduino IOT Cloud):

/* 
  Sketch generated by the Arduino IoT Cloud Thing "Untitled"
  https://create.arduino.cc/cloud/things/c8a8ddde-72c6-471d-b9b5-38b80cdfdb5e 

  Arduino IoT Cloud Variables description

  The following variables are automatically generated and updated when changes are made to the Thing

  int ldr;
  CloudLight led1;

  Variables which are marked as READ/WRITE in the Cloud Thing will also have functions
  which are called when their values are changed from the Dashboard.
  These functions are generated with the Thing and added at the end of this sketch.
*/

#include "thingProperties.h"

void setup() {
  // Initialize serial and wait for port to open:
  Serial.begin(9600);
  // This delay gives the chance to wait for a Serial Monitor without blocking if none is found
  delay(1500);
  pinMode(34,INPUT);

  // Defined in thingProperties.h
  initProperties();

  // Connect to Arduino IoT Cloud
  ArduinoCloud.begin(ArduinoIoTPreferredConnection);
  
  /*
     The following function allows you to obtain more information
     related to the state of network and IoT Cloud connection and errors
     the higher number the more granular information you’ll get.
     The default is 0 (only errors).
     Maximum is 4
 */
  setDebugMessageLevel(2);
  ArduinoCloud.printDebugInfo();
}

void loop() {
  ArduinoCloud.update();
  // Your code here 
  int ldr_val=analogRead(34);
  ldr=ldr_val;
  Serial.println(ldr_val);
  
  
  
}

/*
  Since Led1 is READ_WRITE variable, onLed1Change() is
  executed every time a new value is received from IoT Cloud.
*/
void onLed1Change()  {
  // Add your code here to act upon Led1 change
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/eQAuHvE9dYc" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

### Expt #: Soil Moisture(Blynk):

#define BLYNK_TEMPLATE_ID "TMPLxNtPLUlo"
#define BLYNK_DEVICE_NAME "SOIL MOISTURE"

#define BLYNK_FIRMWARE_VERSION        "0.1.0"

#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG

#define APP_DEBUG

// Uncomment your board, or configure a custom board in Settings.h
//#define USE_WROVER_BOARD
//#define USE_TTGO_T7
//#define USE_ESP32C3_DEV_MODULE''J  
//#define USE_ESP32S2_DEV_KIT


#define soilPin 34


#include "BlynkEdgent.h"
BlynkTimer timer;

float SoilMoisture_percentage()
{
  float moisture_percentage;

  moisture_percentage = ( 100.00 - ( (analogRead(soilPin)/4095.00) * 100.00 ) );
  Serial.println(analogRead(soilPin));

  Serial.print("Soil Moisture(in Percentage) = ");
  Serial.print(moisture_percentage);
  Serial.println("%");

  delay(1000);
  return moisture_percentage;
}


void sendSensor()
{
  float percntge = SoilMoisture_percentage();

  if (isnan(percntge)) {
    Serial.println("Failed to read from soil sensor!");
    return;
  }
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V0, percntge);
  
}



void setup()
{
  Serial.begin(115200);
  delay(100);
  pinMode(soilPin, INPUT);
  BlynkEdgent.begin();
  timer.setInterval(1000L, sendSensor);
}

void loop() {
  BlynkEdgent.run();
  timer.run();
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/YO98mE9eAxw" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Expt #: IR PROXIMITY SENSOR (Arduino IOT Cloud):

/* 
  Sketch generated by the Arduino IoT Cloud Thing "Untitled 2"
  https://create.arduino.cc/cloud/things/6103c627-b619-4a8b-ad2b-364d5aa86481 

  Arduino IoT Cloud Variables description

  The following variables are automatically generated and updated when changes are made to the Thing

  CloudLight iR_PROX;

  Variables which are marked as READ/WRITE in the Cloud Thing will also have functions
  which are called when their values are changed from the Dashboard.
  These functions are generated with the Thing and added at the end of this sketch.
*/

#include "thingProperties.h"

void setup() {
  // Initialize serial and wait for port to open:
  Serial.begin(9600);
  // This delay gives the chance to wait for a Serial Monitor without blocking if none is found
  delay(1500); 
  pinMode(34,INPUT);
  

  // Defined in thingProperties.h
  initProperties();

  // Connect to Arduino IoT Cloud
  ArduinoCloud.begin(ArduinoIoTPreferredConnection);
  
  /*
     The following function allows you to obtain more information
     related to the state of network and IoT Cloud connection and errors
     the higher number the more granular information you’ll get.
     The default is 0 (only errors).
     Maximum is 4
 */
  setDebugMessageLevel(2);
  ArduinoCloud.printDebugInfo();
}

void loop() {
  ArduinoCloud.update();
  // Your code here 
  iR_PROX=digitalRead(34);
  
  
  
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/riflRFg5dG8" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

### EXPT # : LED CONTROL using MIT APP INVENTOR

#include <WiFi.h>
const char* ssid = "8888888";
const char* password = "8888888";

WiFiServer server(80); // Port 80

#define LED2  2    // LED2 is a Built-in LED.
String STATE = "";
int wait30 = 30000; // time to reconnect when connection is lost.

void setup() {
  Serial.begin(115200);
  pinMode(LED2, OUTPUT);

// Connect WiFi net.
  Serial.println();
  Serial.print("Connecting with ");
  Serial.println(ssid);
 
  WiFi.begin(ssid, password);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected with WiFi.");
 
  // Start Web Server.
  server.begin();
  Serial.println("Web Server started.");
 
  Serial.print("This is IP to connect to the WebServer: ");
  Serial.print("http://");
  Serial.println(WiFi.localIP());
}
 
void loop() {
// If disconnected, try to reconnect every 30 seconds.
  if ((WiFi.status() != WL_CONNECTED) && (millis() > wait30)) {
    Serial.println("Trying to reconnect WiFi...");
    WiFi.disconnect();
    WiFi.begin(ssid, password);
    wait30 = millis() + 30000;
  } 
  // Check if a client has connected..
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
   
  Serial.print("New client: ");
  Serial.println(client.remoteIP());



  /////////////////////////////////////////////////////
  // Read the information sent by the client.
  String req = client.readStringUntil('\r');
  Serial.println(req);

  // Make the client's request.
       if (req.indexOf("ON") != -1) {digitalWrite(LED2, HIGH); STATE = "ON";}
       if (req.indexOf("OFF") != -1){digitalWrite(LED2, LOW); STATE = "OFF";}
 
  //  WEB PAGE.
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  Important.
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("<head><meta charset=utf-8></head>");
  client.println("<body>")
  client.println("</body></html>");

  Serial.print("Client disconnected: ");
  Serial.println(client.remoteIP());
  client.flush();
  client.stop();
}

<iframe width="560" height="315" src="https://www.youtube.com/embed/beZ7IvgaxA8" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>