I’m creating an IoT Oximeter. I run my code without Blynk, and my loop runs as fast as possible then, when I implement Blynk, my loop runs slow. I’m using MAX30102 sensor. This gives an inaccurate reading from the sensor. Is there anything that I can improve in the code? Here is my code:
/* Fill-in your Template ID (only if using Blynk.Cloud) */
//#define BLYNK_TEMPLATE_ID "YourTemplateID"
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <Wire.h>
#include "MAX30105.h"
#include "heartRate.h"
MAX30105 particleSensor;
const byte RATE_SIZE = 4; //Increase this for more averaging. 4 is good.
byte rates[RATE_SIZE]; //Array of heart rates
byte rateSpot = 0;
long lastBeat = 0; //Time at which the last beat occurred
float beatsPerMinute;
int beatAvg;
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "*";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "*";
char pass[] = "*";
BlynkTimer timer;
void setup()
{
// Debug console
Serial.begin(9600);
Serial.println("Initializing...");
Blynk.begin(auth, ssid, pass);
// Initialize sensor
if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
{
Serial.println("MAX30105 was not found. Please check wiring/power. ");
while (1);
}
Serial.println("Place your index finger on the sensor with steady pressure.");
particleSensor.setup(); //Configure sensor with default settings
particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running
particleSensor.setPulseAmplitudeGreen(0); //Turn off Green LED
timer.setInterval(1L, sensor);
}
void loop()
{
Blynk.run();
timer.run();
}
void sensor()
{
long irValue = particleSensor.getIR();
if (checkForBeat(irValue) == true)
{
//We sensed a beat!
long delta = millis() - lastBeat;
lastBeat = millis();
beatsPerMinute = 60 / (delta / 1000.0);
if (beatsPerMinute < 255 && beatsPerMinute > 20)
{
rates[rateSpot++] = (byte)beatsPerMinute; //Store this reading in the array
rateSpot %= RATE_SIZE; //Wrap variable
//Take average of readings
beatAvg = 0;
for (byte x = 0 ; x < RATE_SIZE ; x++)
beatAvg += rates[x];
beatAvg /= RATE_SIZE;
}
}
Serial.print("IR=");
Serial.print(irValue);
Serial.print(", BPM=");
Serial.print(beatsPerMinute);
Serial.print(", Avg BPM=");
Serial.print(beatAvg);
Blynk.virtualWrite(V1,beatAvg);
if (irValue < 50000)
Serial.print(" No finger?");
Serial.println();
}