MAX30100 sensor stops working when I combine with stepper

Using Arduino Sensors
1

I have an arduino uno connected to a stepper motor via a driver and a max30100 purple edition (functioning model). When I have the HR sensor code by itself everything works, but when I added some other code from my stepper it stopped sending data. Any suggestions, its for a school project due on Friday 9th sep.
(Working by itself)

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image1041×1194 190 KB

(Stops working with stepper code added (code below)) (no data sent always stays at zero)

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 20, 4);

#include "MAX30100_PulseOximeter.h"

#define REPORTING_PERIOD_MS     1000

PulseOximeter pox;
uint32_t tsLastReport = 0;



#include <AccelStepper.h>
#define dirPin 2
#define stepPin 3
#define motorInterfaceType 1
AccelStepper stepper = AccelStepper(motorInterfaceType, stepPin, dirPin);


int stepArray[5] = {0, 60, 90, 120, 120};
int selectStep;
int stepSelect = 1;

int timeArray[5] = {0, 2, 3, 4, 4};
int selectTime;
int speedSelect = 1;

const byte limitSwitch = 4;
const byte buttonPin = 6;

void setup() {
  Serial.begin(9600) ;
  lcd.init();
  lcd.backlight();
  stepper.setMaxSpeed(1000);
  if (!pox.begin()) {
    Serial.println("FAILED");
    for (;;);
  } else {
    Serial.println("SUCCESS");
  }
  pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);

  while (digitalRead(buttonPin) != HIGH) {}
  PinMode(4, INPUT);
  PinMode(6, INPUT);
  Serial.println(digitalRead(limitSwitch));
  Serial.println(digitalRead(buttonPin));

  delay(1000);

  if (digitalRead(limitSwitch) == 1) {
    // Do Nothing
  }
  else if (digitalRead(limitSwitch) == 0) {
    long arbitraryStep = 50000;
    stepper.setCurrentPosition(0);
    delay(1000);
    while ((stepper.currentPosition() != arbitraryStep) && (digitalRead(limitSwitch) == 0)) {
      stepper.setSpeed(1);
      stepper.runSpeed();
      delay(1000);
      Serial.print(digitalRead(limitSwitch));
    }
  }
}

void loop() {
  stepSelect = map(analogRead(A1), 0, 1024, 1, 5);
  selectStep = stepArray[stepSelect];
  lcd.setCursor(0, 0);
  lcd.print("TIDALVOLUME:");
  lcd.setCursor(12, 0);
  lcd.print((selectStep / 30) - 1);

  lcd.setCursor(0, 1);
  speedSelect = map(analogRead(A0), 0, 1024, 1, 5);
  selectTime = timeArray[speedSelect];
  lcd.print("BREATHSPERMINUTE:");
  lcd.print(60 / (selectTime + 2));
  unsigned long cTime = millis();
  while ((millis() - cTime) < 500) {// wait for 500 milliseconds
    pox.update();
  }

  stepper.setCurrentPosition(0);
  while (stepper.currentPosition() != selectStep)
  {
    pox.update();
    stepper.setSpeed(int(selectStep / (selectTime)));
    stepper.runSpeed();
  }
  cTime = millis();
  while ((millis() - cTime) < 500) {// wait for 500 milliseconds
    pox.update();
  }

  // Reset the position to 0:
  stepper.setCurrentPosition(0);

  cTime = millis();
  while ((millis() - cTime) < 500) {// wait for 500 milliseconds
    pox.update();
  }

  // Run the motor backwards at 600 steps/second until the motor reaches -200 steps (1 revolution):
  while (stepper.currentPosition() != -selectStep)
  {
    pox.update();
    stepper.setSpeed(-int(selectStep / (selectTime)));
    stepper.runSpeed();
  }
  pox.update();
  if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
    //    lcd.clear();      // Clear LCD
    lcd.setCursor(0, 2);
    lcd.print("HR:");
    lcd.setCursor(3, 2);
    Serial.print("Heart rate:");
    Serial.print(pox.getHeartRate());
    lcd.print(pox.getHeartRate());
    lcd.setCursor(0, 3);
    lcd.print("SPO2:");
    lcd.setCursor(5, 3);
    float spo2Value = pox.getSpO2();
    lcd.print(spo2Value);
    Serial.print("bpm / SpO2:");
    Serial.print(spo2Value);
    Serial.println("%");
    if (spo2Value < 90) {
      // play a note on pin 6 for 1 second :
      tone(5, 440, 1000);
    }
    cTime = millis();
    while ((millis() - cTime) < 500) {// wait for 500 milliseconds
      pox.update();
    }
    tsLastReport = millis();
  }
  cTime = millis();
  while ((millis() - cTime) < 500) {// wait for 500 milliseconds
    pox. Update();
  }

}type or paste code here
2

?!?

Did you mean this?

  pinMode(4, INPUT);
  pinMode(6, INPUT);

What are Pin 4 and Pin 6 connected to?

3

Good pickup, i will adjust that in the code, but any ideas how to solve the HR sensor not giving any data when I combine it with my stepper code?

4

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