COMBINATION OF TEMPERATURE ,PIR AND ULTRASONIC SENSORS

 

CODE:-

int sensorPin = A0;

//int sensor = 2;              // the pin that the sensor is atteched to

int val = 0;

#define echoPin 8 // attach pin D2 Arduino to pin Echo of HC-SR04

#define trigPin 3 //attach pin D3 Arduino to pin Trig of HC-SR04

// defines variables

long duration; // variable for the duration of sound wave travel

int distance;

void setup(){

  pinMode(sensorPin,INPUT);//temp

  pinMode (2,INPUT);//pir

  pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT

  pinMode(echoPin, INPUT);

   pinMode(4, OUTPUT);

  pinMode(5, OUTPUT);

  pinMode(6, OUTPUT);

  Serial.begin(9600); 

}

void loop() {

  

    int adcData = analogRead(sensorPin);  

float voltage = (adcData)*(5.0/1024)*1000;

float temperatureC = (voltage - 500)/10 ;  //converting from 10 mv per degree with 500 mV offset

     //to degrees ((voltage - 500mV)/10)

Serial.print("adcData="); 

Serial.println(adcData);

Serial.print(temperatureC); 

Serial.println(" degrees C");

  // now convert to Fahrenheit

float temperatureF = (temperatureC * 9.0 / 5.0) + 32.0;

Serial.print(temperatureF); 

Serial.println(" degrees F");

 

  

     val = digitalRead(2);   // read sensor value

  Serial.print("motion =");

  Serial.println(val);

 

  

    

   // Clears the trigPin condition

  digitalWrite(trigPin, LOW);

  delayMicroseconds(2);

  // Sets the trigPin HIGH (ACTIVE) for 10 microseconds

  digitalWrite(trigPin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);

  // Reads the echoPin, returns the sound wave travel time in microseconds

  duration = pulseIn(echoPin, HIGH);

  // Calculating the distance

  distance = (duration * 0.0343) / 2; // Speed of sound wave divided by 2 (go and back)

  // Displays the distance on the Serial Monitor

  Serial.print("Distance: ");

  Serial.print(distance);

  Serial.println(" cm");

  

  if(val==1){

    if( temperatureC>=10&& temperatureC<=30){

      if(distance>=10&&distance<=100){

        digitalWrite(4,HIGH);

        digitalWrite(5,LOW);

        digitalWrite(6,LOW);

      }

    }

  

  

  else if( temperatureC>30&& temperatureC<=60){

      if(distance>100&&distance<=200){

        digitalWrite(4,LOW);

        digitalWrite(5,HIGH);

        digitalWrite(6,LOW);

      }

    }

  

 else if( temperatureC>60&& temperatureC<=80){

      if(distance>200&&distance<=250){

        digitalWrite(4,LOW);

        digitalWrite(5,LOW);

        digitalWrite(6,HIGH);

      }

    }

  

  

  

  

  

  

  

  

  }delay(500);}