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#DonLucElectronics #DonLuc #MAX30102PPG #FireBeetle2ESP32E #ESP32 #DFRobot #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant
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Photoplethysmography
A PPG sensor is a non-invasive optical device that uses light (usually LEDs) and a photodetector to measure changes in blood volume in tissues, commonly used in wearables for monitoring heart rate, oxygen saturation (SpO2), and respiration by detecting fluctuations in light absorption or reflection as blood pumps through vessels. These sensors are cost-effective and popular in smartwatches and fitness trackers, working by shining light into the skin and analyzing how much light returns, which varies with each heartbeat.
Gravity: MAX30102 PPG Heart Rate and Oximeter Sensor
DFRobot Gravity: MAX30102 heart rate and blood oxygen sensor module integrates the Maxim MAX30102 chip and an MCU with heart rate and blood oxygen algorithm. The MAX30102 uses PPG to measure data, which will be converted into heart rate and oximetry values when processed by the MCU, then output through I2C or UART, making the sensor easy to use and greatly reducing resource occupation of the main controller. The pressure may change when the finger is directly pressed down the sensor, which will affect the data output. So please try to fix the sensor on your finger. Wear the sensor on your finger and there is no difference in the direction of wearing.
DL2512Mk03
1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 3.5” 480×320 TFT LCD Capacitive
1 x GDL Line 10 CM
1 x Gravity: IO Shield for FireBeetle 2
1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT
1 x Gravity: MAX30102 PPG Heart Rate and Oximeter Sensor
1 x Lithium Ion Battery – 1000mAh
1 x USB 3.0 to Type-C Cable
DL2512Mk03p
DL2512Mk03p.ino
/****** Don Luc Electronics © ******
Software Version Information
Project #28 – Sensors – MAX30102 PPG Sensor – Mk21
28-21
DL2512Mk03p.ino
DL2512Mk03
1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 3.5” 480x320 TFT LCD Capacitive
1 x GDL Line 10 CM
1 x Gravity: IO Shield for FireBeetle 2
1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT
1 x Gravity: MAX30102 PPG Heart Rate and Oximeter Sensor
1 x Lithium Ion Battery - 1000mAh
1 x USB 3.0 to Type-C Cable
*/
// Include the Library Code
// EEPROM Library to Read and Write EEPROM
// with Unique ID for Unit
#include "EEPROM.h"
// Arduino
#include "Arduino.h"
// DFRobot Display GDL API
#include <DFRobot_GDL.h>
// MAX30102 PPG Heart Rate and Oximeter
#include <DFRobot_BloodOxygen_S.h>
// Use I2C for communication, but use the
//serial port for communication if the
//line of codes were masked
#define I2C_COMMUNICATION
// Address
#define I2C_ADDRESS 0x57
// MAX30102 PPG Heart Rate and Oximeter
DFRobot_BloodOxygen_S_I2C MAX30102(&Wire ,I2C_ADDRESS);
float fSPO2 = 0;
float fHeartBeat = 0;
float fTempB = 0;
// Defined ESP32
#define TFT_DC D2
#define TFT_CS D6
#define TFT_RST D3
/*dc=*/ /*cs=*/ /*rst=*/
// DFRobot Display 320x480
DFRobot_ILI9488_320x480_HW_SPI screen(TFT_DC, TFT_CS, TFT_RST);
// EEPROM Unique ID Information
#define EEPROM_SIZE 64
String uid = "";
// Software Version Information
String sver = "28-21";
void loop() {
// PPG
isPPG();
// isDisplayPPG
isDisplayPPG();
// Delay
delay( 1000 );
}
getDisplay.ino
// DFRobot Display 320x480
// DFRobot Display 320x480 - UID
void isDisplayUID(){
// DFRobot Display 320x480
// Text Display
// Text Wrap
screen.setTextWrap(false);
// Rotation
screen.setRotation(3);
// Fill Screen => black
screen.fillScreen(0x0000);
// Text Color => white
screen.setTextColor(0xffff);
// Font => Free Sans Bold 12pt
screen.setFont(&FreeSansBold12pt7b);
// TextSize => 1.5
screen.setTextSize(1.5);
// Don Luc Electronics
screen.setCursor(0, 30);
screen.println("Don Luc Electronics");
// SD
screen.setCursor(0, 60);
screen.println("PPG Sensor");
// Version
screen.setCursor(0, 90);
screen.println("Version");
screen.setCursor(0, 120);
screen.println( sver );
// EEPROM
screen.setCursor(0, 150);
screen.println("EEPROM");
screen.setCursor(0, 180);
screen.println( uid );
}
// isDisplayPPG
void isDisplayPPG(){
// DFRobot Display 320x480
// Text Display
// Text Wrap
screen.setTextWrap(false);
// Rotation
screen.setRotation(3);
// Fill Screen => white
screen.fillScreen(0xffff);
// Text Color => blue
screen.setTextColor(0x001F);
// Font => Free Sans Bold 12pt
screen.setFont(&FreeSansBold12pt7b);
// TextSize => 1.5
screen.setTextSize(1.5);
// Accelerometer
screen.setCursor(0, 30);
screen.println("PPG Sensor");
// SPO2
screen.setCursor(0, 60);
screen.println("SPO2: ");
screen.setCursor(190, 60);
screen.println( fSPO2 );
screen.setCursor(260, 60);
screen.println(" %");
// Heartbeat
screen.setCursor(0, 90);
screen.println("Heartbeat: ");
screen.setCursor(190, 90);
screen.println( fHeartBeat );
screen.setCursor(260, 90);
screen.println(" Times/Min");
// Temperature Board
screen.setCursor(0, 120);
screen.println("Temp Board: ");
screen.setCursor(190, 120);
screen.println( fTempB );
screen.setCursor(260, 120);
screen.println(" C");
}
getEEPROM.ino
// EEPROM
// isUID EEPROM Unique ID
void isUID() {
// Is Unit ID
uid = "";
for (int x = 0; x < 7; x++)
{
uid = uid + char(EEPROM.read(x));
}
}
getPPG.ino
// MAX30102 PPG Heart Rate and Oximeter
// Setup PPG
void iSetupPPG(){
// Setup PPG
while (false == MAX30102.begin())
{
delay(1000);
}
// Begin
MAX30102.sensorStartCollect();
}
// is PPG
void isPPG(){
// MAX30102 PPG Heart Rate and Oximeter
MAX30102.getHeartbeatSPO2();
// SPO2
fSPO2 = MAX30102._sHeartbeatSPO2.SPO2;
// Heartbeat
fHeartBeat = MAX30102._sHeartbeatSPO2.Heartbeat;
// Temperature Board
fTempB = MAX30102.getTemperature_C();
}
setup.ino
// Setup
void setup()
{
// Delay
delay( 100 );
// EEPROM Size
EEPROM.begin(EEPROM_SIZE);
// EEPROM Unique ID
isUID();
// Delay
delay( 100 );
// Wire
Wire.begin();
// Delay
delay( 100 );
// Setup PPG
iSetupPPG();
// Delay
delay( 100 );
// DFRobot Display 320x480
screen.begin();
// Delay
delay(100);
// DFRobot Display 320x480 - UID
// Don Luc Electronics
// Version
// EEPROM
isDisplayUID();
// Delay 5 Second
delay( 5000 );
}
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