/****************************************

// https://www.facebook.com/groups/arduino.support.forum/permalink/1200190981187527/
HERE IS A COMBINED CODE FOR AMTEL AVR XPLAINED MINI  OR CALLED
 NANAO V3 HAVING THREE ONBOARD RGB LEDS 
THAT ARE CONNECTED TO PIN 2 I HAVE USED THE NANAO BOARD AND HAVE SHOWN THE RGB LEDS SEPERATLY
AS NANO V3 IS NOT A COMPONENT OF WOKWI ,HOEVER THE ABOVE LINK WILL EXPLAIN NANO V3
ARVIND PATIL INDIA 23/7/24


https://youtu.be/GaplZeeH1P4?si=EWd2KeX36ce1fqZ4
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#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_NeoPixel.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 4
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define PIN        2   // The pin connected to the NeoPixel strip
#define NUMPIXELS  3   // The number of LEDs in the strip
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

// Variables for timing
unsigned long previousMillisDisplay = 0;
unsigned long previousMillisNeoPixel = 0;
const long intervalDisplay = 3000; // Interval for OLED display updates
const long intervalNeoPixel = 20;  // Interval for NeoPixel updates

// Function to generate rainbow colors across 0-255 positions
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  } else {
    WheelPos -= 170;
    return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  }
}

// Function for rainbow cycle
void rainbowCycle() {
  static uint16_t j = 0;
  uint16_t i;

  for (i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
  }
  strip.show();
  j++;
}

void setup() {
  Serial.begin(9600);
  // Initialize OLED display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // Initialize with the I2C addr 0x3C (for the 128x32)
  display.clearDisplay();
  display.display(); // This command will display all the data which is in buffer

  // Initialize NeoPixel strip
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  unsigned long currentMillis = millis();

  // Update OLED display based on the time interval
  if (currentMillis - previousMillisDisplay >= intervalDisplay) {
    previousMillisDisplay = currentMillis;

    // Drawing animation on OLED display
    display.clearDisplay();
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(10, 10);
    display.println("ARVIND");
    display.display();
    
    display.setCursor(20, 40);
    display.setTextSize(1);
    display.println("COMBINED CODES");
    display.display();
    delay(3000);
    // Drawing diagonal lines
    display.clearDisplay();
    display.drawLine(0, 0, display.width() - 1, display.height() - 1, WHITE);
    display.drawLine(display.width() - 1, 0, 0, display.height() - 1, WHITE);
    display.display();
    delay(5000);

    // Drawing rectangles
    display.clearDisplay();
    display.drawRect(100, 10, 20, 20, WHITE);
    display.fillRect(10, 10, 45, 15, WHITE);
    display.drawRoundRect(60, 20, 35, 35, 8, WHITE);
    display.display();
    delay(5000);

    // Drawing circles
    display.clearDisplay();
    display.drawCircle(30, 15, 15, WHITE);
    display.fillCircle(25, 10, 2, WHITE);
    display.fillCircle(35, 10, 2, WHITE);
    display.display();
    delay(5000);

    // Drawing points
    display.clearDisplay();
    display.drawPixel(20, 35, WHITE);
    display.drawPixel(45, 12, WHITE);
    display.drawPixel(120, 59, WHITE);
    display.drawPixel(97, 20, WHITE);
    display.drawPixel(35, 36, WHITE);
    display.drawPixel(72, 19, WHITE);
    display.drawPixel(90, 7, WHITE);
    display.drawPixel(11, 29, WHITE);
    display.drawPixel(57, 42, WHITE);
    display.drawPixel(69, 34, WHITE);
    display.drawPixel(108, 12, WHITE);
    display.display();
    delay(5000);
  }

  // Update NeoPixel strip based on the time interval
  if (currentMillis - previousMillisNeoPixel >= intervalNeoPixel) {
    previousMillisNeoPixel = currentMillis;
    rainbowCycle();  // Update NeoPixel colors
  }
}