DIY heart rate monitor and pulse oximeter

1#include <Wire.h>
2#include "MAX30100_PulseOximeter.h"
3#define  BLYNK_PRINT Serial
4#include <Blynk.h>
5#include <ESP8266WiFi.h>
6#include  <BlynkSimpleEsp8266.h>
7 
8#include "Wire.h"
9
10#define REPORTING_PERIOD_MS  1000
11
12// PulseOximeter is the higher level interface to the sensor
13// it  offers:
14//  * beat detection reporting
15//  * heart rate calculation
16//  * SpO2 (oxidation level) calculation
17 
18char auth[] = "v60fhfJerBZAZzmYbwS2uSzs2Qvy6sjK";             // You should get Auth Token in the Blynk App.
19char ssid[] = "TP-LINK_9950";                                     // Your WiFi credentials.
20char pass[] =  "8348502146";
21 
22// Connections : SCL PIN - D1 , SDA PIN - D2 , INT PIN -  D0
23PulseOximeter pox;
24 
25float BPM, SpO2;
26uint32_t tsLastReport = 0;
27  
28// Callback (registered below) fired when a pulse is detected
29 
30void onBeatDetected()
31{
32    Serial.println("Beat!");
33}
34 
35void setup()
36{
37    Serial.begin(115200);
38    
39    pinMode(16, OUTPUT);
40    Blynk.begin(auth, ssid, pass);
41 
42    Serial.print("Initializing Pulse Oximeter..");
43    // Initialize the PulseOximeter  instance
44    // Failures are generally due to an improper I2C wiring, missing  power supply
45    // or wrong target chip
46 
47    if (!pox.begin()) {
48        Serial.println("FAILED");
49        for(;;);
50    } else {
51        Serial.println("SUCCESS");
52    }
53
54    // The default current for the IR LED is 50mA and it could be changed
55    //   by uncommenting the following line. Check MAX30100_Registers.h for all  the
56    //   available options.
57    // pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
58
59    // Register a callback for the beat detection
60    pox.setOnBeatDetectedCallback(onBeatDetected);
61  
62}
63 
64void loop()
65{
66    pox.update();
67    Blynk.run();
68 
69    BPM = pox.getHeartRate();
70    SpO2 = pox.getSpO2();
71    
72   if (millis()  - tsLastReport > REPORTING_PERIOD_MS)
73    {
74        Serial.print("Heart rate:");
75        Serial.print(BPM);
76        Serial.print(" bpm / SpO2:");
77        Serial.print(SpO2);
78        Serial.println(" %");
79 
80        Blynk.virtualWrite(V7, BPM);
81        Blynk.virtualWrite(V8, SpO2);
82 
83        tsLastReport = millis();
84    }
85}
86