WU_HuiQiao
Published © GPL3+

Touchless Thermometer

This project can measure human body temperature without contact, and it also can send an alarm when it has detected an unnormal temperature.

IntermediateFull instructions provided6,312

Things used in this project

Hardware components

Arduino Nano R3
Arduino Nano R3
×1
5 mm LED: Red
5 mm LED: Red
×3
5 mm LED: Yellow
5 mm LED: Yellow
×3
5 mm LED: Green
5 mm LED: Green
×3
Ultrasonic Sensor - HC-SR04 (Generic)
Ultrasonic Sensor - HC-SR04 (Generic)
×1
Buzzer
Buzzer
×1
Rotary Encoder with Push-Button
Rotary Encoder with Push-Button
×6
Resistor 10k ohm
Resistor 10k ohm
×2
Resistor 1k ohm
Resistor 1k ohm
×1
Jumper wires (generic)
Jumper wires (generic)
×1
Custom PCB
Custom PCB
×1
MLX90641
×1
Standard LCD - 16x2 White on Blue
Adafruit Standard LCD - 16x2 White on Blue
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

Read more

Schematics

Schematic for the project

Code

MLX90641_Buzzer Code

C/C++
/*  Written by HuiQiao  
 */
 
 
 #include <EEPROM.h>
#include <Wire.h>
#include <LiquidCrystal.h>
#include <Adafruit_MLX90614.h>
#include "Adafruit_NeoPixel.h"
#ifdef __AVR__
#include <avr/power.h>
#endif




LiquidCrystal lcd(6, 10, 9, 14, 15, 16);




#define RGBPIN            4
#define NUMPIXELS         4
#define btnRIGHT  0
#define btnUP     1
#define btnDOWN   2
#define btnLEFT   3
#define btnSELECT 4
#define btnSELECT1 6
#define btnNONE   5
#define BellStart 5
#define CLOSEDIS  40
Adafruit_MLX90614 mlx = Adafruit_MLX90614();




int musicpin=5;
int bellFlag=0;
int soundFlag=1;
int startFlag=0;
int TrigPin = 1; 
int EchoPin = 0; 




Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, RGBPIN, NEO_GRB + NEO_KHZ800);
byte bell[8] =
{
 B00010,
 B00111,
 B00111,
 B00110,
 B00111,
 B10110,
 B11110,
 B01010
};
byte bell1[8] =
{
 B00001,
 B00011,
 B00100,
 B01000,
 B01000,
 B01000,
 B11111,
 B00001
};

byte bell2[8] =
{
 B10000,
 B11000,
 B00100,
 B00010,
 B00010,
 B00010,
 B11111,
 B10000
};
byte bell3[8] =
{
 B00001,
 B00010,
 B00100,
 B01000,
 B10000,
 B11000,
 B00111,
 B00000
};
byte bell4[8] =
{
 B00001,
 B00010,
 B00100,
 B01000,
 B10000,
 B11000,
 B00111,
 B00000
};
byte bell5[8] =
{
 B00000,
 B00011,
 B00111,
 B11101,
 B11101,
 B00111,
 B00011,
 B00000
};
byte bell6[8] =
{
 B00001,
 B00010,
 B00100,
 B01000,
 B10000,
 B11000,
 B00111,
 B00000
};
byte freep[8] =
{
 B00000,
 B00000,
 B00000,
 B00000,
 B00000,
 B00000,
 B00000,
 B00000
};




int mat1=0;
int mat2=0;
/////////////////////////////////////////
struct bellTime{
    int thour;
    int tmin;
    int tsec;
};
bellTime _bTime;
bellTime _obTime;

int wb_H=0;
int wb_L=30;
/////////////////////////////////////////
void setup() {
  
  int i;
  
  float wTemp;
  
  Serial.begin(9600);
  
  pinMode (musicpin, OUTPUT);
  
  pinMode (A0, INPUT);
  
  pinMode (A1, INPUT);
  
  pinMode (A2, INPUT);
  
  pinMode (A3, INPUT);
  
  pinMode (7, INPUT);
  
  pinMode (8, INPUT);
  
  pinMode(TrigPin, OUTPUT);
  
  pinMode(EchoPin, INPUT); 
  
  mlx.begin();
  
  delay(100);
  
  for(i=0;i<8;i++)
  
  {
    
    bell3[i] = ~bell1[i];
    
    bell4[i] = ~bell2[i];
    
    bell6[i] = ~bell5[i];
    
    }  
    
  lcd.createChar(0, bell);
  
  lcd.createChar(1, bell1);
  
  lcd.createChar(2, bell2);
  
  lcd.createChar(3, bell3);
  
  lcd.createChar(4, bell4);
  
  lcd.createChar(5, bell5); 
  
  lcd.createChar(6, bell6);
  
  lcd.begin(16, 2);
  
  ////////////////////////////////////
  
  wb_H = ReadCfg(0); 
  
  wb_L = ReadCfg(1);
  
  wTemp = ((wb_H<<8)+wb_L)/10.0;  
  
  ////////////////////////////////////
  
  char tmbuff[16];
  
  mat1 = 1;
  
  lcd.setCursor(BellStart-3,1);
  
  lcd.write(mat1);
  
  mat2 = 2;
  
  lcd.setCursor(BellStart-2,1);
  
  lcd.write(mat2);
  
  mat1 = 6;
  
  lcd.setCursor(12,1);
  
  lcd.write(mat1);

  dtostrf(wTemp,2,1,tmbuff);
  
  String s = String(tmbuff)+"*C";
  
   lcd.setCursor(BellStart,1);
   
   lcd.print(s);
   
  pixels.begin(); 

}

int frmCnt=0;
int crosPos=0;


void loop() {
  
    int frameDelay=25;
    
    float boTemp;
    
    float sum;
    
    char tmbuff[2];
    
    char disbuff[16];
    
    String s;   
    
    char sHour[4];
    
    char sMin[4];
    
    char sSec[4]; 
    
    int i;
    
    float distance;
    
    
    
    
    // 10usTrigPin 
    
        digitalWrite(TrigPin, LOW); 
        
        delayMicroseconds(2); 
        
        digitalWrite(TrigPin, HIGH); 
        
        delayMicroseconds(10);
        
        digitalWrite(TrigPin, LOW); 
        
    // 
    
    
        distance = pulseIn(EchoPin, HIGH) / 58.00;
        
        Serial.print(distance); 
        
        Serial.print("cm"); 
        
        Serial.println(); 
        
        if(distance<10||distance>CLOSEDIS)
        
        {
          
          for( i=0;i<NUMPIXELS;i++){ 
            
            pixels.setPixelColor(i, pixels.Color(0,0,0));
            
            pixels.show(); 
            
            }
            
            startFlag=0;
            
          delay(1000);
          
          return;
          
          }else if(distance<CLOSEDIS)
          
          {
            
            for( i=0;i<NUMPIXELS;i++){ 
              
            pixels.setPixelColor(i, pixels.Color(200,255,0));
            
            pixels.show(); 
            
            }
            
            startFlag = 1;
            
            }
    
      if(getKey()==btnSELECT)
      
      {
        SetClock();
        
        }else if(getKey()==btnLEFT)
        
        {
          soundFlag = 1;
          
          mat1 = 5;
          
          lcd.setCursor(12,1);
          
          lcd.write(mat1);
          
          }else if(getKey()==btnRIGHT)
          
        {
          soundFlag = 0;
          
          mat1 = 6;
          
          lcd.setCursor(12,1);
          
          lcd.write(mat1);
          
          }
             
      if(startFlag)
      
      {
        sum=0.0;
        
        if(startFlag==1)
        
        {
          s = "|";
          
          for(i=0;i<5;i++)
          
          {
            s+="-";
            
            sum+=mlx.readObjectTempC();
            
            delay(200);
            
            lcd.setCursor(5,0);
            
            lcd.print(s);
            
            }

            sum = sum/5.0;
            
            dtostrf(sum,2,1,disbuff);
            
    s = String(disbuff)+"*C;
    
    lcd.setCursor(5,0);
    
    lcd.print(s);
    
    if((sum*10)>((wb_H<<8)+wb_L))
    
    {
      for( i=0;i<NUMPIXELS;i++){ 
        
            pixels.setPixelColor(i, pixels.Color(255,0,0));
            
            pixels.show(); 
            
            }
      Warnning(18);
      
      }else{
        
        for( i=0;i<NUMPIXELS;i++){ 
          
            pixels.setPixelColor(i, pixels.Color(0,255,0));
            
            pixels.show();
            
            }
            
        Warnning(2);
        
        }
    
          }
          
          startFlag++;
          
          if(startFlag==10)
          
              startFlag=0;
        }
        
   delay(500);
  
}
void Warnning(int b)
{
  int i;
  
  for(i=0;i<b;i++)
  
  {
    if((i%2)==0)
    {
      mat1 = 3;   
      
      mat2 = 4;  
      
      }else{
        
      mat1 = 1;   
      
      mat2 = 2;  
        }
        
       lcd.setCursor(BellStart-3,1);
       
       lcd.write(mat1); 
       
       lcd.setCursor(BellStart-2,1);
       
       lcd.write(mat2); 
       
       if(soundFlag) 
       
       {
         
        digitalWrite(musicpin,(i%2));    
        
          }
          
       delay(1000/b);
    }
    
    digitalWrite(musicpin,0); 
    
  }
//



void SetClock(){
  
  int setCnt=0;
  
  char tmbuff[16];
  
  String s;
  
  int noact=0;
  
  int aimDis = ((wb_H<<8)+wb_L);
  
  float setVal;
  
    crosPos = 1;
    
        setCnt = 0;
        
        lcd.setCursor(BellStart+crosPos+2,1);
        
        lcd.blink();
        
        for(;;)
        
        {             
             if(setCnt>3&&getKey()==btnSELECT1)
             
             {     
                 break;
              }   
              
             if(getKey()==btnUP)
             
              {
                noact=0;
                
                lcd.noBlink();
                
                      if(aimDis<400)
                      
                      aimDis++;
                      
                      else
                      
                      aimDis=0;
                      
                      setVal = aimDis/10.0;
                      
                      dtostrf(setVal,2,1,tmbuff);
                      
                      s = String(tmbuff)+"*C";
                      
                      lcd.setCursor(BellStart+crosPos-1,1); 
                      
                      lcd.print(s);  
                      
                      lcd.setCursor(BellStart+crosPos+2,1);    
                      
                      lcd.blink();
                      
                }else if(getKey()==btnDOWN)
                
              {
                noact=0;
                
                lcd.noBlink();
                
                      if(aimDis>0)
                      
                      aimDis--;
                      
                      else
                      
                      aimDis=400;
                      
                      setVal = aimDis/10.0;
                      
                      dtostrf(setVal,2,1,tmbuff);
                      
                      s = String(tmbuff)+"*C";
                      
                      lcd.setCursor(BellStart+crosPos-1,1);  
                      
                      lcd.print(s);
                      
                      lcd.setCursor(BellStart+crosPos+2,1);                      
                      lcd.blink();
                      
                }else if(getKey()==btnNONE)
                
                {
                  noact++;
                  
                  if(noact>50)
                  
                  break;
                  
                  }
                  
              delay(200);
              
              setCnt++;
              
          }
          
          //RTC.begin();
          
          crosPos = 0;
          
          lcd.noBlink();
          
          wb_H = aimDis>>8;
          
          wb_L = aimDis&0xff;
          
          WriteCfg(0,wb_H);
          
          WriteCfg(1,wb_L);
          
          Serial.println("set ok!");

}

int getKey() {
  
   if(!digitalRead(A0))
   
   {
    delay(10);
    
    if(!digitalRead(A0))
    
       return btnUP;
       
    }
   if(!digitalRead(A1))
   
   {
    delay(10);
    
    if(!digitalRead(A1))
    
    return btnRIGHT; 
    
    }
   if(!digitalRead(A3)){ 
     
    delay(10);
    
    if(!digitalRead(A3))
    
    return btnDOWN;
    
    }
   if(!digitalRead(A2)){
     
    delay(10);
    
    if(!digitalRead(A2))
    
     return btnLEFT;
     
     }
   if(!digitalRead(7)) {
     
    delay(10);
    
    if(!digitalRead(7))
    
    return btnSELECT;
    
    } 
    if(!digitalRead(8)) {
      
    delay(10);
    
    if(!digitalRead(8))
    
    return btnSELECT1; 
    
    } 
  return btnNONE;
  
}

unsigned char ReadCfg(unsigned char addr)

 {
      unsigned char val;
      
      val =  EEPROM.read(addr);  
      
      return val;
      
  }
  
  void WriteCfg(unsigned char addr,unsigned char val)
 {
      EEPROM.write(addr, val);
  }

Credits

WU_HuiQiao

WU_HuiQiao

1 project • 5 followers
I like building things.

Comments