Pemantau Oksigen Darah & Suhu Tubuh Arduino – Bangun Sistem Dual-Sensor
Komponen dan Perlengkapan
× 1 × 1 Max30102 Heart Rate Sensor
× 1 × 1 × 1 Modul Sensor Suhu Inframerah Non-Kontak GY-906-BCC
× 1 × 1
Tentang Proyek Ini
Proyek ini dapat mendeteksi nilai oksigen darah dan suhu tubuh secara bersamaan, nilai apa pun yang lebih rendah dari nilai yang ditetapkan akan menyala merah.
Hal yang penting adalah modul oksigen darah perlu diletakkan jari Anda secara alami di atasnya untuk deteksi, dan tidak perlu menekan terlalu kuat, jika tidak nilai akan salah.
Selamat Tahun Baru dan Nikmatinya.
► Kode di GitHub (skema dan sketsa): https://github.com/DKARDU/bloodoxygen
► Komponen
Berikut adalah bagian yang digunakan dalam proyek ini:
Arduino UNO, https://amzn.to/3ihYFBl
20 x 4 I2C LCD, https://amzn.to/3gTMZnW
Max30102 Heart Rate Sensor
Dua LED, https://amzn.to/3g1v5za
Dua resistansi 220Ω, https://amzn.to/2OSGlBW
Modul Sensor Suhu Inframerah Non-Kontak GY-906-BCC
❤Langganan Gratis https://bit.ly/2C6HdAg
Terima kasih telah menonton, Tetap di rumah dan Tetap aman... Semoga harimu menyenangkan!
#Arduinoproject #ArduinoBloodOxygen #Howto #COVID19 #BloodOxygen #ArduinoBodyTemperature #BodyTemperature
Kode
Blood_Oximeter.inoArduino
#include <LiquidCrystal_I2C.h> #include <Wire.h> #include <Adafruit_MLX90614.h> #include <EEPROM.h> #include "MAX30105.h" //sparkfun MAX3010X library MAX30105 particleSensor; LiquidCrystal_I2C lcd(0x27,20,4); //#define MAX30105 //if you have Sparkfun's MAX30105 breakout board , try #define MAX30105 Adafruit_MLX90614 mlx = Adafruit_MLX90614(); double avered = 0; double aveir = 0; double sumirrms = 0; double sumredrms = 0; int i = 0; int Num = 100;//calculate SpO2 by this sampling interval int Temperature; int temp; float ESpO2;//initial value of estimated SpO2 float ESpO2_ROM; double FSpO2 = 0.7; //filter factor for estimated SpO2 double frate = 0.95; //low pass filter for IR/red LED value to eliminate AC component #define TIMETOBOOT 3000 // wait for this time(msec) to output SpO2 #define SCALE 88.0 //adjust to display heart beat and SpO2 in the same scale #define SAMPLING 5 //if you want to see heart beat more precisely , set SAMPLING to 1 #define FINGER_ON 30000 // if red signal is lower than this , it indicates your finger is not on the sensor #define USEFIFO #define Greenled 8 #define Redled 9 void setup() { Serial.begin(115200); lcd.init(); lcd.backlight(); lcd.setCursor(3,1); lcd.print("Running......"); delay(3000); lcd.clear(); ESpO2 = readEEPROM(); Temperature = EEPROM.read(6); pinMode(Greenled,OUTPUT); pinMode(Redled,OUTPUT); digitalWrite(Greenled,LOW); digitalWrite(Redled,LOW); // Initialize sensor while (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed { Serial.println("MAX30102 was not found. Please check wiring/power/solder jumper at MH-ET LIVE MAX30102 board. "); //while (1); } //Setup to sense a nice looking saw tooth on the plotter byte ledBrightness = 0x7F; //Options: 0=Off to 255=50mA byte sampleAverage = 4; //Options: 1, 2, 4, 8, 16, 32 byte ledMode = 2; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green //Options: 1 = IR only, 2 = Red + IR on MH-ET LIVE MAX30102 board int sampleRate = 200; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200 int pulseWidth = 411; //Options: 69, 118, 215, 411 int adcRange = 16384; //Options: 2048, 4096, 8192, 16384 // Set up the wanted parameters particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange); //Configure sensor with these settings particleSensor.enableDIETEMPRDY(); mlx.begin(); } void loop() { uint32_t ir, red , green; double fred, fir; double SpO2 = 0; //raw SpO2 before low pass filtered #ifdef USEFIFO particleSensor.check(); //Check the sensor, read up to 3 samples while (particleSensor.available()) {//do we have new data #ifdef MAX30105 red = particleSensor.getFIFORed(); //Sparkfun's MAX30105 ir = particleSensor.getFIFOIR(); //Sparkfun's MAX30105 #else red = particleSensor.getFIFOIR(); //why getFOFOIR output Red data by MAX30102 on MH-ET LIVE breakout board ir = particleSensor.getFIFORed(); //why getFIFORed output IR data by MAX30102 on MH-ET LIVE breakout board #endif i++; fred = (double)red; fir = (double)ir; avered = avered * frate + (double)red * (1.0 - frate);//average red level by low pass filter aveir = aveir * frate + (double)ir * (1.0 - frate); //average IR level by low pass filter sumredrms += (fred - avered) * (fred - avered); //square sum of alternate component of red level sumirrms += (fir - aveir) * (fir - aveir);//square sum of alternate component of IR level if ((i % SAMPLING) == 0) {//slow down graph plotting speed for arduino Serial plotter by thin out if ( millis() > TIMETOBOOT) { float ir_forGraph = (2.0 * fir - aveir) / aveir * SCALE; float red_forGraph = (2.0 * fred - avered) / avered * SCALE; //trancation for Serial plotter's autoscaling if ( ir_forGraph > 100.0) ir_forGraph = 100.0; if ( ir_forGraph < 80.0) ir_forGraph = 80.0; if ( red_forGraph > 100.0 ) red_forGraph = 100.0; if ( red_forGraph < 80.0 ) red_forGraph = 80.0; // Serial.print(red); Serial.print(","); Serial.print(ir);Serial.print("."); float temperature = particleSensor.readTemperatureF(); if (ir < FINGER_ON){ temp = Temperature; EEPROM.write(6,temp); ESpO2_ROM = ESpO2; writeEEPROM(&ESpO2_ROM); lcd.setCursor(0,2); lcd.print("Last test: "); lcd.setCursor(11,2); lcd.print(ESpO2_ROM); lcd.print(" "); lcd.print("% "); lcd.setCursor(0,3); lcd.print("Last temp: "); lcd.setCursor(11,3); lcd.print(temp); lcd.print(" "); lcd.print("*C"); break; } if(ir > FINGER_ON){ Temperature = mlx.readObjectTempC(); lcd.setCursor(0,0); lcd.print("Oxygen % = "); lcd.setCursor(11,0); lcd.print(ESpO2); lcd.print(" "); lcd.print("% "); // Temperature = Temperature+2; lcd.setCursor(0,1); lcd.print("Temperature: "); lcd.print(Temperature); lcd.print(" *C"); if((ESpO2 >= 90) && (Temperature < 38)){ digitalWrite(Redled,LOW); digitalWrite(Greenled,HIGH); } if((ESpO2 < 90) || (Temperature > 37)){ digitalWrite(Greenled,LOW); digitalWrite(Redled,HIGH); } } } } if ((i % Num) == 0) { double R = (sqrt(sumredrms) / avered) / (sqrt(sumirrms) / aveir); // Serial.println(R); SpO2 = -23.3 * (R - 0.4) + 100; //https://ww1.microchip.com/downloads/jp/AppNotes/00001525B_JP.pdf ESpO2 = FSpO2 * ESpO2 + (1.0 - FSpO2) * SpO2;//low pass filter // Serial.print(SpO2);Serial.print(",");Serial.println(ESpO2); sumredrms = 0.0; sumirrms = 0.0; i = 0; break; } particleSensor.nextSample(); //We're finished with this sample so move to next sample // Serial.println(SpO2); } #endif } void writeEEPROM(float *data) { byte ByteArray[4]; memcpy(ByteArray, data, 4); for(int x = 0; x < 4; x++) { EEPROM.write(x, ByteArray[x]); } } float readEEPROM() { float ESpO2 = 85.0; byte ByteArray[4]; for(int x = 0; x < 4; x++) { ByteArray[x] = EEPROM.read(x); } memcpy(&ESpO2, ByteArray, 4); return ESpO2; }
Skematik
