Problem sending Heartbeat and spo2 data to Firebase using MAX30100_Minimal code

Using Arduino Programming Questions
#1

Hello everyone!

I am using GY-MAX30100 sensor to measure HeartRate and spo2. I am getting proper readings from the sensor when I am not sending my readings to firebase but when I start sending my readings to firebase, my sensor stops measuring heart rate and spo2 reading and only sending 0 bpm and 0 spo2 readings to firebase and even to my serial monitor.

Here is my code, when I am sending my readings to Firebase:

#include <ESP8266WiFi.h>
#include <FirebaseArduino.h>

// Set these to run example.
#define FIREBASE_HOST "test-8bc5c.firebaseio.com"
#define FIREBASE_AUTH "JATYiyaws143Yd68A12wjlG38MBa3UjFAn4BZ2Rv"
#define WIFI_SSID "TP-LINK_8D8E"
#define WIFI_PASSWORD "qwerty1234"

#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
float bpm = 0.0;
float oxygen = 0.0;

#define REPORTING_PERIOD_MS     1000
 
// PulseOximeter is the higher level interface to the sensor
// it offers:
//  * beat detection reporting
//  * heart rate calculation
//  * SpO2 (oxidation level) calculation
PulseOximeter pox;
 
uint32_t tsLastReport = 0;
 
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
    Serial.println("Beat!");
}
 
void setup()
{
    Serial.begin(230400);
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
    
 
    Serial.print("Initializing pulse oximeter..");
 
    // Initialize the PulseOximeter instance
    // Failures are generally due to an improper I2C wiring, missing power supply
    // or wrong target chip
    if (!pox.begin()) {
        Serial.println("FAILED");
        for(;;);
    } else {
        Serial.println("SUCCESS");
    }
 
    // The default current for the IR LED is 50mA and it could be changed
    //   by uncommenting the following line. Check MAX30100_Registers.h for all the
    //   available options.
    // pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
 
    // Register a callback for the beat detection
    pox.setOnBeatDetectedCallback(onBeatDetected);
    
    
    
    Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
}
 
void loop()
{
    // Make sure to call update as fast as possible
    pox.update();
    
    // Asynchronously dump heart rate and oxidation levels to the serial
    // For both, a value of 0 means "invalid"
      if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
          bpm = pox.getHeartRate();
          oxygen = pox.getSpO2();
          Serial.print("Heart rate:");
          Serial.print(bpm);
          Serial.print("bpm / SpO2:");
          Serial.print(oxygen);
          Serial.println("%");
          
          delay(100);
          tsLastReport = millis();
                
      }
     Firebase.setInt("/heartbeat", bpm);             
     Firebase.setInt("/oxygen", oxygen); 
  
}

Here are my readings when I am trying to send data to Firebase:

Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%
Heart rate:0.00bpm / SpO2:0.00%

I will be very thankful to you if you will look into my problem.
Thank You!

PS: I have also attached my sensor’s picture:

GY-MAX30100.jpg
GY-MAX30100.jpg1000×1000 152 KB

#2

Not really familiar with firebase but the example demo code has error checking which you do not

Firebase.setFloat("number", 42.0);
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /number failed:");
      Serial.println(Firebase.error());  
      return;

That may help shed some light on what is going wrong.

You also make your firebase calls EVERY time through loop() - maybe put them inside your time delay loop like your serial output.

#3

Thank you blh64 for your help. Actually, the problem is with the code it generates the heartbeat and oxygen in a particular time so, if we add another code with it, it will add delay, which stops reading heart rate and oxygen from the sensor.

So far, I did not find any proper solution. What I did is just add ESP.restart() command after sending data to firebase because I was getting zero reading after sending data to firebase.

1 Like
#4

Did you solve this problem? Im having the same issue

#5

Hi.

Try to move the line:

Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);

before

if (!pox.begin()) {}

so as to "make sure to call update as fast as possible".

Also try to add two lines before and after

Firebase.setInt();

as follows:

pox.shutdown();
Firebase.setInt("/heartbeat", bpm);
Firebase.setInt("/oxygen", oxygen);
pox.resume();

I have met a similar problem when using MAX30100 with Ambient, the Iot data visualizing service, on M5stickc.
I haven't tried it with Firebase, but by doing so it worked well anyway on Ambient.

I'm a beginner of Arduino so I'm afraid it might be misguided advice.
I hope it helps you.

Thanks,

#6

Any one solve this issue? I am also facing the same issue.

I will be very greatful to if any one can fix my isses.

Thanks in advance.

#7

Hi guys :slight_smile:

I found the solution, and it’s not necessary to restart the ESP.

Here you have the code.

//Unidades Tecnologicas de Santander
//Ingenieria de Telecomunicaciones
//Andres F. Ramirez B.

#include <Arduino.h>
#include <Wire.h>
#include “MAX30100_PulseOximeter.h”
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include “ESP8266WebServer.h”
#include <FirebaseArduino.h>

#define REPORTING_PERIOD_MS 1000

#define FIREBASE_HOST “THE LINK OF UR DB PROJECT”
#define FIREBASE_AUTH “THE KEY OF UR FIREBASE PROJECT”

#define WIFI_SSID “YOUR SSID”
#define WIFI_PASSWORD “YOUR PASS”

PulseOximeter pox;

unsigned long previousMillis=0;
const long interval=1000;
volatile boolean heartBeatDetected = false;

void onBeatDetected()
{
heartBeatDetected = true;
Serial.println(“Beat!”);

}

void setup()
{
Serial.begin(115200);

WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print(“Connecting”);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());

Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);

if (Firebase.failed()) {
Serial.print(“setting /message failed:”);
Serial.println(Firebase.error());
}

if (!pox.begin()) {
Serial.println(“FAILED”);
for(;;);
} else {
Serial.println(“SUCCESS”);
}

pox.setOnBeatDetectedCallback(onBeatDetected);
}

void leerDatos(){

float bpm = pox.getHeartRate();
float SpO2 =pox.getSpO2();

if( heartBeatDetected && bpm !=0) {

if(SpO2>0){

// here you put the variables what you have in ur db

Firebase.setFloat(“Dato/Ritmo cardiaco”, bpm);
Firebase.setFloat(“Dato/SpO2”, SpO2);

// you can delete this line below, it’s just to know it send the datas in the serial monitor
Serial.print(“Envia”);

}

}

}

void loop()
{

pox.update();

unsigned long currentMillis=millis();
if(currentMillis-previousMillis>=interval)
{
pox.shutdown();
leerDatos();
pox.resume();
previousMillis=currentMillis;

}

}

#8

hi
how you make it work ? i think i have same problem this my post:

i'm new to arduino can you help ?

#9