Receiving data from 3 sensors

Hello,
I am working with Arduino Uno and Mega for a project assignment. In this study, I aim to get movement data from the MPU6050 sensor, stress data from the GSR sensor, and pulse and SPO2 data from the MAX30102 sensor. All sensors work separately and receive data smoothly. However, when I want to combine 3 sensors at the same time in one code, only the MAX30102 sensor works. Other sensors do not measure or give a not found error. Since Uno's memory is not enough, I use Mega to receive data from 3 sensors simultaneously. I checked all the connections. I compiled the code in different formats, but the problem did not change. Can you help with this issue? RELEVANT CODE IS BELOW
Thanks.

`#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include "MAX30105.h"
#include "spo2_algorithm.h"
#include "heartRate.h"

Adafruit_MPU6050 mpu;
MAX30105 particleSensor;

#define MAX_BRIGHTNESS 255

#if defined(AVR_ATmega328P) || defined(AVR_ATmega168)
uint16_t irBuffer[100];
uint16_t redBuffer[100];
#else
uint32_t irBuffer[100];
uint32_t redBuffer[100];
#endif

int32_t bufferLength;
int32_t spo2;
int8_t validSPO2;
int32_t heartRate;
int8_t validHeartRate;

byte pulseLED = 11;
byte readLED = 13;
const byte RATE_SIZE = 4;
byte rates[RATE_SIZE];
byte rateSpot = 0;
long lastBeat = 0;

float beatsPerMinute;
int beatAvg;

const int gsrPin = A0;

void setup() {
  Serial.begin(115200);
  while (!Serial) {
    delay(10);
  }

  // MPU6050 Başlatma
  if (!mpu.begin(0x68)) {
    Serial.println("Failed to find MPU6050 chip at address 0x68");
    if (!mpu.begin(0x69)) {
      Serial.println("Failed to find MPU6050 chip at address 0x69");
      while (1) {
        delay(10);
      }
    }
  }
  Serial.println("MPU6050 found!");

  mpu.setAccelerometerRange(MPU6050_RANGE_16_G);
  mpu.setGyroRange(MPU6050_RANGE_250_DEG);
  mpu.setFilterBandwidth(MPU6050_BAND_21_HZ);
  delay(100);

  pinMode(pulseLED, OUTPUT);
  pinMode(readLED, OUTPUT);

  // MAX30105 Başlatma
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) {
    Serial.println(F("MAX30105 was not found. Please check wiring/power."));
    while (1);
  }

  Serial.println(F("Attach sensor to finger with rubber band. Press any key to start conversion"));
  while (Serial.available() == 0);
  Serial.read();

  byte ledBrightness = 60;
  byte sampleAverage = 4;
  byte ledMode = 2;
  byte sampleRate = 100;
  int pulseWidth = 411;
  int adcRange = 4096;

  particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange);
  Serial.println("Initializing...");

  Serial.println("Place your index finger on the sensor with steady pressure.");
  particleSensor.setPulseAmplitudeRed(0x0A);
  particleSensor.setPulseAmplitudeGreen(0);

  Serial.println("GSR/EDA sensörü hazır.");
}

void loop() {
  // MPU6050'dan Veri Okuma
  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  Serial.print("AccelX:");
  Serial.print(a.acceleration.x);
  Serial.print(",");
  Serial.print("AccelY:");
  Serial.print(a.acceleration.y);
  Serial.print(",");
  Serial.print("AccelZ:");
  Serial.print(a.acceleration.z);
  Serial.print(", ");
  Serial.print("GyroX:");
  Serial.print(g.gyro.x);
  Serial.print(",");
  Serial.print("GyroY:");
  Serial.print(g.gyro.y);
  Serial.print(",");
  Serial.print("GyroZ:");
  Serial.print(g.gyro.z);
  Serial.println("");

  delay(10);

  bufferLength = 100;

  for (byte i = 0; i < bufferLength; i++) {
    while (particleSensor.available() == false)
      particleSensor.check();

    redBuffer[i] = particleSensor.getRed();
    irBuffer[i] = particleSensor.getIR();
    particleSensor.nextSample();

    Serial.print(F("red="));
    Serial.print(redBuffer[i], DEC);
    Serial.print(F(", ir="));
    Serial.println(irBuffer[i], DEC);
  }

  maxim_heart_rate_and_oxygen_saturation(irBuffer, bufferLength, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

  for (byte i = 25; i < 100; i++) {
    redBuffer[i - 25] = redBuffer[i];
    irBuffer[i - 25] = irBuffer[i];
  }

  for (byte i = 75; i < 100; i++) {
    while (particleSensor.available() == false)
      particleSensor.check();

    digitalWrite(readLED, !digitalRead(readLED));

    redBuffer[i] = particleSensor.getRed();
    irBuffer[i] = particleSensor.getIR();
    particleSensor.nextSample();

    Serial.print(F("red="));
    Serial.print(redBuffer[i], DEC);
    Serial.print(F(", ir="));
    Serial.print(irBuffer[i], DEC);

    Serial.print(F(", BPM="));
    Serial.print(heartRate, DEC);

    Serial.print(F(", BPMvalid="));
    Serial.print(validHeartRate, DEC);

    Serial.print(F(", SPO2="));
    Serial.print(spo2, DEC);

    Serial.print(F(", SPO2Valid="));
    Serial.println(validSPO2, DEC);
  }

  maxim_heart_rate_and_oxygen_saturation(irBuffer, bufferLength, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);

  long irValue = particleSensor.getIR();

  if (checkForBeat(irValue) == true) {
    long delta = millis() - lastBeat;
    lastBeat = millis();

    beatsPerMinute = 60 / (delta / 1000.0);

    if (beatsPerMinute < 255 && beatsPerMinute > 20) {
      rates[rateSpot++] = (byte)beatsPerMinute;
      rateSpot %= RATE_SIZE;

      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);

  if (irValue < 50000)
    Serial.print(" No finger?");

  Serial.println();

  int gsrValue = analogRead(gsrPin);

  Serial.print("GSR/EDA Değeri: ");
  Serial.println(gsrValue);

  delay(1000);
}

6 posts - 4 participants

Read full topic