****************** Aurdino DH11 Hardware **************************
 
#include <DHT.h> // Include Adafruit DHT11 Sensors Library #define
DHTPIN 7 // DHT11 Output Pin connection
#define DHTTYPE DHT11 // DHT Type is DHT11 DHT
dht(DHTPIN, DHTTYPE); // Initialize DHT sensor
void setup () {
dht.begin();
pinMode(6,OUTPUT);
Serial.begin(9600); // To see data on serial monitor
}
void loop (){
float H = dht.readHumidity(); //Read Humidity
float T = dht.readTemperature(); // Read temperature as Celsius //
Check if any reads failed and if exit
if (isnan(H) || isnan(T))
{ Serial.println("Failed to read from DHT sensor!"); return; } //
Combine Humidity and Temperature into single string String dhtData =
String(H) + "," + String(T);
Serial.println(dhtData);
if(H > 50){
digitalWrite(6,HIGH); // LED is now ON
}
else{
}
digitalWrite(6,LOW); // LED is now OFF
delay(2000); // Wait two seconds between measurements
}


**************** Gas Sensor ****************************
int LED = 13;
int MQ2pin = A0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
float sensorValue;
sensorValue = analogRead(MQ2pin);
if(sensorValue >= 250)
{
digitalWrite(LED,HIGH);
Serial.print(sensorValue);
Serial.println("GAS DETECTED");
}
else
{
digitalWrite(LED,LOW);
Serial.print("Air quality in ppm is : ");
Serial.println(sensorValue);
}
delay (1000);
}

******************* TINKER CAD SMART STREET  LIGHT , SOIL MOISTURE LEVEL *****************

SMART LIGHT ---------------------->

int ldr_pin = A5;
int ldr_value;
int light = 3;
void setup()
{
pinMode(light, OUTPUT);
pinMode(ldr_pin, INPUT);
}
void loop()
{
ldr_value = analogRead(ldr_pin);
if (ldr_value > 512)
digitalWrite(light, 0);
else
digitalWrite(light, 1);
}

SOIL MOISTURE -------------------->

int moisture_data = 0;
void setup()
{
pinMode(A0, INPUT);
Serial.begin(9600);
pinMode(12, OUTPUT);
pinMode(6, OUTPUT);
}
void loop()
{
moisture_data = analogRead(A0);
Serial.println(moisture_data);
if (moisture_data < 21) {
digitalWrite(12, HIGH);
digitalWrite(6, HIGH);
} else {
digitalWrite(12, LOW);
digitalWrite(6, LOW);
}
delay(10); // Delay a little bit to improve simulation performance
}

************************** SOIL MOISTURE SENSORE - IR LDR *******************

intasensor=A2;    //Define pin for A0 pin of the sensor
intdsensor=4;    //Define pin for D0 pinof the sensor
voidsetup(){
Serial.begin(9600);    //Set baud rate for serial communication
}voidloop(){
intasensorData=analogRead(asensor);    //Read analog datat from the sensor
intdsensorData=digitalRead(dsensor);    //Read digital data from the sensor
Serial.print(" A Sensor Data:");
Serial.println(asensorData);           //Print analog data on the serial monitor
Serial.print(" D Sensor Data:");
Serial.println(dsensorData);        //Print digital data on the serial monitor
delay(1000);}








var m = msg.playload.split(",")
var H = {payload: parseFloat(m[0])};
var T = {payload: parseFloat(m[1])};
return [H, T];

#include <DHT.h>
#define DHTPIN 7
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
void setup () {
 dht.begin();
 Serial.begin(9600);
}
void loop (){
 float H = dht.readHumidity();
 float T = dht.readTemperature();
 if (isnan(H) || isnan(T)){
 Serial.println("Failed to read from DHT sensor!");
 return;
 }
 String dhtData = String(H) + "," + String(T);
 Serial.println(dhtData);
 delay(2000);
}



int red1=8;
int green1=6;
int yellow1=7;
int red2=3;
int green2=5;
int yellow2=4;
const int pingPin = 10; // Trigger Pin of Ultrasonic Sensor
const int echoPin = 9; // Echo Pin of Ultrasonic Sensor
const int pingPin2 = 12; // Trigger Pin of Ultrasonic Sensor
const int echoPin2 = 11; // Echo Pin of Ultrasonic Sensor

void setup() {
  // put your setup code here, to run once:
pinMode(red1,OUTPUT);
pinMode(red2,OUTPUT);
pinMode(yellow1,OUTPUT);
pinMode(yellow2,OUTPUT);
pinMode(green1,OUTPUT); 
pinMode(green2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int distance1,distance2;
  distance1=calculatedistance(pingPin , echoPin);
  distance2=calculatedistance(pingPin2 , echoPin2);
  if(distance1>=distance2){
     digitalWrite(red1,LOW);
digitalWrite(green2,LOW);
digitalWrite(red2,LOW);
digitalWrite(green1,LOW);
digitalWrite(yellow1,HIGH);
digitalWrite(yellow2,HIGH);
delay(200);
    while(distance1>distance2){
   distance1=calculatedistance(pingPin , echoPin);
  distance2=calculatedistance(pingPin2 , echoPin2);
digitalWrite(red1,HIGH);
digitalWrite(green2,HIGH);
digitalWrite(red2,LOW);
digitalWrite(green1,LOW);
digitalWrite(yellow1,LOW);
digitalWrite(yellow2,LOW);
    }

  }



if(distance2>distance1){
    digitalWrite(red1,LOW);
digitalWrite(green2,LOW);
digitalWrite(red2,LOW);
digitalWrite(green1,LOW);
digitalWrite(yellow1,HIGH);
digitalWrite(yellow2,HIGH);
delay(200);
  while(distance2>distance1){
      distance1=calculatedistance(pingPin , echoPin);
  distance2=calculatedistance(pingPin2 , echoPin2);
digitalWrite(red1,LOW);
digitalWrite(green2,LOW);
digitalWrite(red2,HIGH);
digitalWrite(green1,HIGH);
digitalWrite(yellow1,LOW);
digitalWrite(yellow2,LOW);
  }


}

}


long microsecondsToCentimeters(long microseconds)
{
   return microseconds / 29 / 2;
}

int calculatedistance(int pingPin , int echoPin){
    long duration, inches, cm,meter;
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(pingPin, LOW);

  pinMode(echoPin, INPUT);
  duration = pulseIn(echoPin, HIGH);
  
  cm = microsecondsToCentimeters(duration);
  meter = cm/100;
  return meter;
}