COVID-19 Prevention Badge

1#include <OneWire.h>
2
3#include <OneWire.h>
4#include <DallasTemperature.h>
5int  buzzer = 8;
6int const trigPin = 10;
7int const echoPin = 9;
8
9
10
11int  temp_sensor = 2;
12
13float temperature = 0;
14int lowerLimit = 15;
15int higherLimit  = 38.5;
16OneWire oneWirePin(temp_sensor);
17DallasTemperature sensors(&oneWirePin);
18void  setup(void){
19  pinMode(trigPin, OUTPUT); 
20	pinMode(echoPin, INPUT); 
21	pinMode(8,  OUTPUT);
22  Serial.begin(9600);
23  
24 
25
26  sensors.begin();
27}
28void  loop(){
29int duration, distance;
30digitalWrite(trigPin, HIGH); 
31	delay(1);
32	digitalWrite(trigPin,  LOW);
33	
34	duration = pulseIn(echoPin, HIGH);
35	distance = (duration/2)  / 29.1;
36	if (distance <= 50 ) {
37    	// Buzz
38    	digitalWrite(8 , LOW);
39    } else {
40    	// Don't buzz
41    	digitalWrite(8 , HIGH);
42    }
43    // Waiting 60 ms won't hurt any one
44    delay(60);
45  Serial.print("Requesting  Temperatures from sensors: ");
46  sensors.requestTemperatures(); 
47  Serial.println("DONE");
48  
49  temperature = sensors.getTempCByIndex(0);
50  ;
51  Serial.print("Temperature  is ");
52  Serial.print(temperature);
53
54if(temperature <= lowerLimit){ 
55    Serial.println(", You are safe."); 
56     digitalWrite(8, LOW);} 
57
58  
59else if(temperature >= higherLimit){
60    Serial.println(", COVID-19 detected");
61    digitalWrite(8, HIGH);
62}
63delay(250);
64}