CoronaBadge.ino

#include <Bounce2.h>
#define BUTTON_PIN PB4
#define led1Pin PB0
#define led2Pin PB1
#define led3Pin PB2
#define led4Pin PB3
#define switchPin PB4
#define delayInterval 100

Bounce debouncer = Bounce(); // Instantiate a Bounce object

uint8_t val; // variable for reading the pin status
uint8_t val2; // variable for reading the delayed status
uint8_t buttonState; // variable to hold the mode switch state

int lightMode = 2;

void setup() {
  PORTB |= (1 << PB4); // set PB4 as input & activate internal pull-up resistor for PB4
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(led3Pin, OUTPUT);
  pinMode(led4Pin, OUTPUT);
}

void loop() {
  val = digitalRead(switchPin); // read input value and store it in val
  delay(10);

  if (val != buttonState) {
    if (val == HIGH) { // check if the mode button is pressed
      if (lightMode == 0) {
        lightMode = 1; // turn LEDs on
      }
      else {
        if (lightMode == 1) { // if LEDs on
          lightMode = 2; // make it flash
        }
        else {
          if (lightMode == 2) { // if LEDs flashing
            lightMode = 3; // make it wave
          }
          else {
            if (lightMode == 3) { // if LEDs waving,
              lightMode = 0; // turn LEDs off
            }
          }
        }
      }
    }

    buttonState = val; // save the new state in our variable
  }
  // Now do whatever the lightMode indicates
  if (lightMode == 0) { // LEDs-off
    
    PORTB |= (1 << PB1); // HIGH
    digitalWrite(led2Pin, LOW);
    digitalWrite(led3Pin, LOW);
    digitalWrite(led4Pin, LOW);
  }

  if (lightMode == 1) { // LEDs-on
    digitalWrite(led1Pin, HIGH);
    digitalWrite(led2Pin, HIGH);
    digitalWrite(led3Pin, HIGH);
    digitalWrite(led4Pin, HIGH);
  }

  if (lightMode == 2) { // LEDS-flashing
    digitalWrite(led1Pin, HIGH);
    digitalWrite(led2Pin, HIGH);
    digitalWrite(led3Pin, HIGH);
    digitalWrite(led4Pin, HIGH);

    delay(100);
    digitalWrite(led1Pin, LOW);
    digitalWrite(led2Pin, LOW);
    digitalWrite(led3Pin, LOW);
    digitalWrite(led4Pin, LOW);
    delay(100);
  }

  if (lightMode == 3) { // LEDs-waving
    digitalWrite(led4Pin, LOW);
    digitalWrite(led1Pin, HIGH);
    delay(100);
    digitalWrite(led1Pin, LOW);
    digitalWrite(led2Pin, HIGH);
    delay(100);
    digitalWrite(led2Pin, LOW);
    digitalWrite(led3Pin, HIGH);
    delay(100);
    digitalWrite(led3Pin, LOW);
    digitalWrite(led4Pin, HIGH);
    delay(100);
    digitalWrite(led4Pin, LOW);
  }
}