COVID-19 Prevention Badge

#include <OneWire.h>

#include <OneWire.h>
#include <DallasTemperature.h>
int buzzer = 8;
int const trigPin = 10;
int const echoPin = 9;



int temp_sensor = 2;

float temperature = 0;
int lowerLimit = 15;
int higherLimit = 38.5;
OneWire oneWirePin(temp_sensor);
DallasTemperature sensors(&oneWirePin);
void setup(void){
  pinMode(trigPin, OUTPUT); 
	pinMode(echoPin, INPUT); 
	pinMode(8, OUTPUT);
  Serial.begin(9600);
  
 

  sensors.begin();
}
void loop(){
int duration, distance;
digitalWrite(trigPin, HIGH); 
	delay(1);
	digitalWrite(trigPin, LOW);
	
	duration = pulseIn(echoPin, HIGH);
	distance = (duration/2) / 29.1;
	if (distance <= 50 ) {
    	// Buzz
    	digitalWrite(8 , LOW);
    } else {
    	// Don't buzz
    	digitalWrite(8 , HIGH);
    }
    // Waiting 60 ms won't hurt any one
    delay(60);
  Serial.print("Requesting Temperatures from sensors: ");
  sensors.requestTemperatures(); 
  Serial.println("DONE");
  
  temperature = sensors.getTempCByIndex(0);
  ;
  Serial.print("Temperature is ");
  Serial.print(temperature);

if(temperature <= lowerLimit){ 
    Serial.println(", You are safe."); 
     digitalWrite(8, LOW);} 

 
else if(temperature >= higherLimit){
    Serial.println(", COVID-19 detected");
    digitalWrite(8, HIGH);
}
delay(250);
}