Make A Coronavirus Detector Using MLX90615 Digital Infrared Temperature Sensor

Note: This project is made by Linter originally appeared on Hackster.io

This is a “coronavirus detector” based on Seeed Studio Grove – MLX90615 Digital Infrared Temperature Sensor.

Coronavirus Detector

There are two detectors on the mask. Each detector is made by the same infrared temperature sensor. And I choose to use Grove – OLED Display 1.12” V2 to display the temperature data on the mask.

Things used in this project

Detector

1 x Arduino Uno

1 x Grove Base Shield V2.0

2 x Grove – Digital Infrared Temperature Sensor

1 x Grove – MP3 v2.0

1 x Battery

1 x Grove – Button

1 x Mono Enclosed Speaker – 2W 6 Ohm Mono Enclosed Speaker – 2W 6 Ohm

1 x Grove – OLED Display 1.12” V2

1 x Grove – RGB LED Ring (20 – WS2813 Mini)

Many grove cables

Structural

3mm thick acrylic board

some Glue

Tools

Hot melt glue gun.

electric soldering iron

laser cutter 3D Printer machine

This detector has the following functions:

  • The digital infrared temperature sensor above the mask can detect the self-body temperature in real-time and show up the temperature on the OLED display that is attached to the mask.
  • The detector on the other side can detect the temperature of the person I have contacted.
  • If the other person’s temperature is normal, the RGB LED ring in the left eye part is green.
  • If the other person ’s temperature exceeds 38℃, the RGB LED ring will turn to red color and be accompanied by an alert, indicating that he/she is a potential risk with coronavirus, then I will advise him to go to the hospital for test and treatment.

Step 1: What we need

Hardware List

Detector

1 x Arduino Uno

1 x Grove Base Shield V2.0

2 x Grove – Digital Infrared Temperature Sensor

1 x Grove – MP3 v2.0

1 x Battery

1 x Grove – Button

1 x Mono Enclosed Speaker – 2W 6 Ohm

1 x Grove – OLED Display 1.12” V2

1 x Grove – RGB LED Ring (20 – WS2813 Mini)

Many Grove cables

Structural

3mm thick acrylic board

Some glue

Tool

Hot melt glue gun

Electric soldering iron

Laser cutter

3D printer

Step 2: Draw and design CAD

Here is the CAD drawing I have built.

Step 3: Laser cutting

​If you have a manufacturer space near you, you can easily find a laser cutter. I can say that every manufacturer’s space has a laser cutter. If you can’t find the board of the laser cutter, you can try​ the laser cutting service provided by Seeed.

Step 4: Transform the battery

Since our battery is two ports, in order to link to Seeedunio easier, we need to make a small modification to transform the battery to the Grove interface.

Firstly, cut off the port of our battery from the port of the Grove cable.

Secondly, according to the rule of red line pairing with the red line and black line pairing with the black line, solder the lines with an electric soldering iron.

Step 5: Software work

Step 6: ​ Hardware connecting and build up

Connect the hardware as shown below:

The detector will be connected like this:

Note: Because the detection distance of the digital infrared temperature Sensor will lead to different results. I used a distance of about 6mm for detection, so you need to adjust the body temperature formula according to the actual situation of your detection.

This work is actually being modified while trying many different solutions. The current is also a bit rough, and a more refined version will be produced in the future. I hope everyone will like it.

I attached the CAD file and the code below.

detector.inoC/C++
#include <Wire.h>
#include <SeeedGrayOLED.h>
#include <avr/pgmspace.h>

#include "Adafruit_NeoPixel.h"

#include "MLX90615.h"

#include "WT2003S_Player.h"

#ifdef __AVR__
#include <SoftwareSerial.h>
SoftwareSerial SSerial(2, 3); // RX, TX
#define COMSerial SSerial
#define ShowSerial Serial

WT2003S<SoftwareSerial> Mp3Player;
#endif

#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
#define COMSerial Serial1
#define ShowSerial SerialUSB

WT2003S<Uart> Mp3Player;
#endif

#ifdef ARDUINO_ARCH_STM32F4
#define COMSerial Serial
#define ShowSerial SerialUSB

WT2003S<HardwareSerial> Mp3Player;
#endif



#define BY_PINS // Uncomment this to use pins for every MLX
// #define BY_ADDR // Uncomment this to use single bus

#ifdef BY_PINS // USING ADDITIONAL PINS
byte sda_1 = 5;
byte scl_1 = 4;
byte sda_2 = 7;
byte scl_2 = 6;

SoftI2cMaster i2c_1(sda_1, scl_1);
MLX90615 mlx90615_1(DEVICE_ADDR, &i2c_1);
SoftI2cMaster i2c_2(sda_2, scl_2);
MLX90615 mlx90615_2(DEVICE_ADDR, &i2c_2);
#endif // BY_PINS


#ifdef BY_ADDR
// TODO: Update with your real addresses and quantity of MLXs!
#define DEVICE1_ADDR DEVICE_ADDR
#define DEVICE2_ADDR DEVICE_ADDR+1

// #define INCLUDED_I2C

#ifdef INCLUDED_I2C // Using included I2C Library
#define SDA_PIN SDA //define the SDA pin
#define SCL_PIN SCL //define the SCL pin
SoftI2cMaster i2c_bus(SDA_PIN, SCL_PIN);
MLX90615 mlx90615_1(DEVICE1_ADDR, &i2c_bus);
MLX90615 mlx90615_2(DEVICE2_ADDR, &i2c_bus);
#else // Using Wire
MLX90615 mlx90615_1(DEVICE1_ADDR, &Wire);
MLX90615 mlx90615_2(DEVICE2_ADDR, &Wire);
#endif // WITH_WIRE defined
#endif // BY_ADDR defined


//LED
#define PIN 8
#define NUMPIXELS 24
#define BRIGHTNESS 255

Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);
int delayval = 500; // delay for half a






int button1 = 14; //trigger button A0

//MP3
uint8_t vol = 70;
uint32_t spi_flash_songs = 0;
uint32_t sd_songs = 0;
STROAGE workdisk = SD;


float temperatureObj1 = 0;
float temperatureObj2 = 0;





void setup() {
Wire.begin();
SeeedGrayOled.init(SH1107G); //initialize SEEED OLED display
SeeedGrayOled.clearDisplay(); //Clear Display.
SeeedGrayOled.setNormalDisplay(); //Set Normal Display Mode
SeeedGrayOled.setVerticalMode(); // Set to vertical mode for displaying text

COMSerial.begin(9600);
Mp3Player.init(COMSerial);
Mp3Player.volume(vol);

Serial.begin(115200);
while (!Serial); // Only for native USB serial
delay(2000); // Additional delay to allow open the terminal to see setup() messages
Serial.println("Setup...");


pinMode(button1, INPUT);


strip.setBrightness(BRIGHTNESS);
strip.begin();
strip.show(); // Initialize all pixels to 'off'

#ifdef WITH_WIRE
Wire.begin();
#endif // WITH_WIRE defined
}

void loop() {
temperatureObj1 = mlx90615_1.getTemperature(MLX90615_OBJECT_TEMPERATURE);
temperatureObj1=temperatureObj1+3;

if(digitalRead(button1)){
temperatureObj2 = mlx90615_2.getTemperature(MLX90615_OBJECT_TEMPERATURE);
temperatureObj2=temperatureObj2+3;
if(temperatureObj2<38){
mode1();
}
else{
Mp3Player.playSDRootSong(0x0001);
mode2();
}

}

delay(1000);

// Serial.print("Temp_1: ");
// Serial.print(temperatureObj1);
// Serial.print("°C ");

SeeedGrayOled.setTextXY(2,0); //set Cursor to ith line, 0th column
SeeedGrayOled.setGrayLevel(5); //Set Grayscale level. Any number between 0 - 15.
SeeedGrayOled.putFloat(temperatureObj1); //Print Hello World





}


void mode1(void){

for(int i=0;i<NUMPIXELS;i++){
// pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
strip.setPixelColor(i, strip.Color(0,255,0)); // Moderately bright green color.
strip.show(); // This sends the updated pixel color to the hardware.
// delay(250); // Delay for a period of time (in milliseconds).
}
}

void mode2(void){

for(int i=0;i<NUMPIXELS;i++){
// pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
strip.setPixelColor(i, strip.Color(255,0,0)); // Moderately bright green color.
strip.show(); // This sends the updated pixel color to the hardware.
// delay(250); // Delay for a period of time (in milliseconds).
}
}
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