WS2812 Interfering with Other Components of Sketch

Components & Accessories LEDs
1

The below sketch works unless the commented out lines are included as well. All of the commented lines are to program a WS2812 LED. How can that be resolved?

#include <Wire.h>
#include "SparkFun_Qwiic_Rfid.h"
#include <SparkFun_Qwiic_OLED.h>
#include "SparkFun_Qwiic_Keypad_Arduino_Library.h"
#include <Servo.h>
#include <FastLED.h>

#define RFID_ADDR 0x13
#define NUM_LEDS 1
#define LED_DATA_PIN 7

const int intPin = 3; 

Qwiic_Rfid myRfid(RFID_ADDR);
QwiicMicroOLED myOLED;

KEYPAD keypad;

Servo servo;

//CRGB leds[NUM_LEDS];

String tag; 

String msg = "";
int x0, y0;

String passcode = "1111";
String currentEntry = "";
char button = "na";

int photoresistor = A0;
int photoresistorState;
bool checkForPhotoresistor = false;

void setup() {
  delay(1000);

  Wire.begin(); 

  Serial.begin(9600);

  if(myRfid.begin()) Serial.println("Ready to scan some tags!"); 
  else Serial.println("Could not communicate with the Qwiic RFID Reader!!!"); 

  pinMode(intPin, INPUT_PULLUP); 

  delay(1000);

  if (myOLED.begin() == false) {
    Serial.println("OLED begin failed. Freezing...");
    while (true)
        ;
  }

   if (keypad.begin() == false) {
    Serial.println("Keypad does not appear to be connected. Please check wiring. Freezing...");
    while (1);
  }

  servo.attach(5);

  pinMode(photoresistor, INPUT);

  delay(1000);

  //FastLED.addLeds<WS2812, LED_DATA_PIN, RGB>(leds, NUM_LEDS);

  delay(1000);

  //leds[0] = CRGB::Red;
  //FastLED.show();

  delay(1000);

  servo.write(150);
}

void loop() {
  keypad.updateFIFO();  // necessary for keypad to pull button from stack to readable register
  button = keypad.getButton();

  //Serial.println(button);

  if (button != "na" && button != 0) {
    currentEntry += button;

    myOLED.text(0, 0, currentEntry, 1);

    myOLED.display();
  }

  if (digitalRead(intPin) == LOW) {
    tag = myRfid.getTag();

    Serial.println(tag);
  }

  if (tag == "5809121824578" || currentEntry == passcode) {
    myOLED.erase();

    delay(1000);

    //leds[0] = CRGB::Green;
    //FastLED.show();

    msg = "Access Granted";

    x0 = (myOLED.getWidth() - myOLED.getStringWidth(msg)) / 2;
    // starting y position - screen height minus string height / 2 
    y0 = (myOLED.getHeight() - myOLED.getStringHeight(msg)) / 2;

    myOLED.text(0, 0, msg, 1);

    myOLED.display();

    servo.write(30);

    delay(1000);

    checkForPhotoresistor = true;
  } else {
    myOLED.erase();
  }

  while (checkForPhotoresistor) {
      photoresistorState = analogRead(photoresistor);

      Serial.println(photoresistorState);
      
      if (photoresistorState < 200) {
        msg = "";

        delay(2000);

        servo.write(150);

        myOLED.erase();

        myOLED.display();

        //leds[0] = CRGB::Red;
        //FastLED.show();
      }
  }
}
2

Hi @CloudInnovations ,

You have a lot going on there and have only given us part of the story. Which board are you running this on? What happens when you uncomment the WS2812 / FastLED code?

Best wishes,
Paul

3

Hi,

I’m using a Redboard. When commented out, everything is responsive - the keypad, OLED, RFID, but when uncommented nothing happens.

4

Which RedBoard? We have many… Thanks!

5
6

@CloudInnovations :

OK - thanks! I suspect you’re running out of RAM… The ATmega328P only has 2KB of RAM.

I hope this helps,
Paul

1 Like