automatic thermal check and hand sanitizing machine

/*
HC-SR05 pin   Arduino pin   Relay Board
  vcc           5V             X
  Trig         pin 9           X
  Echo         pin 8           X
  Gnd          Gnd             Gnd
   X           pin 12         signal pin
   X           Vin            +V         
*/
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
// OLED display TWI address

// OLED display TWI address

#include <Buzzer.h>

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <stdint.h>
#include <Adafruit_MLX90614.h>
 #define OLED_RESET    4
Adafruit_SSD1306 display1(OLED_RESET);
Adafruit_SSD1306 display2(OLED_RESET);

 

Adafruit_MLX90614 mlx = Adafruit_MLX90614();


Adafruit_SSD1306 display(-1);


int laserPin = 11;

int s;
int state=0; 
void setup() {
 
   pinMode(laserPin, OUTPUT); 
  
  // initialize serial communication:
  Serial.begin(9600);
   pinMode(8, INPUT);
   pinMode(9, OUTPUT);
   pinMode(12, OUTPUT);  
   digitalWrite(9, LOW);
   digitalWrite(8, LOW);


Serial.begin(57600);
  pinMode(13, OUTPUT);
  Serial.println("Adafruit MLX90614 test");  
  mlx.begin();  
 display1.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display2.begin(SSD1306_SWITCHCAPVCC, 0x3D);   // initialize with the I2C addr 0x3C (for the 128x32)
}

void loop() {
  // establish variables for duration of the ping,
  // and the distance result in inches and centimeters:
   digitalWrite(laserPin, HIGH); // Open the laser head
  long duration, inches, cm;

  // The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
 

    digitalWrite(9, HIGH);
    delayMicroseconds(5);
    digitalWrite(9, LOW);
    delayMicroseconds(5);
  // The same pin is used to read the signal from the PING))): a HIGH
  // pulse whose duration is the time (in microseconds) from the sending
  // of the ping to the reception of its echo off of an object.
 
  duration = pulseIn(8, HIGH);

  // convert the time into a distance
  inches = microsecondsToInches(duration);
  cm = microsecondsToCentimeters(duration);

  Serial.print(inches);
  Serial.print("in, ");
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();

  
  if(inches<5){  //  change number increse or decrese distanse eg 12 for 12 inches
 // initialize and clear display

 display1.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display1.clearDisplay();
  display1.display();
  
  display1.setTextSize(5);
  display1.setTextColor(WHITE);
  display1.setCursor(0,0);
  display1.print(" ON");
 
   display1.display();
   digitalWrite(12, LOW);
   delay(1000);
   
  digitalWrite(12, HIGH);
     delay(2000);
    }
    
else {display1.begin(SSD1306_SWITCHCAPVCC, 0x3C);
 display1.clearDisplay();
  display1.display();
 
  display1.setTextSize(5);
  display1.setTextColor(WHITE);
  display1.setCursor(0,0);
  display1.print(" Off");
  
   display1.display();
  
     digitalWrite(12, HIGH); 
}

       // Clear the buffer.
  display2.clearDisplay();
 
  // text display tests
  display2.setTextSize(4);
  display2.setTextColor(WHITE);
  display2.setCursor(0,0);
  //display.print("Ambient: ");//
  //display.print(mlx.readAmbientTempF());// 
  //display.print(" c");//
  display2.setCursor(0,0);
  //display.print("Object: ");//
  display2.print(round(mlx.readObjectTempF())); 
  display2.print(" F");
  display2.display();
  //delay(500); //
if (mlx.readObjectTempF()>98) {digitalWrite(13, HIGH);
}
else {
    digitalWrite(13, LOW);
    }
  //delay(500);//

}

long microsecondsToInches(long microseconds) {
  // According to Parallax's datasheet for the PING))), there are
  // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
  // second).  This gives the distance travelled by the ping, outbound
  // and return, so we divide by 2 to get the distance of the obstacle.
  // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
  return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds) {
  // The speed of sound is 340 m/s or 29 microseconds per centimeter.
  // The ping travels out and back, so to find the distance of the
  // object we take half of the distance travelled.
  return microseconds / 29 / 2;
}









 
#if (SSD1306_LCDHEIGHT != 32)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif