const int led1 = 12; 
const int led2 = 11;
const int led3 = 6; 
const int sw1 = 2;   
const int sw2 = 3; 
const int sensorPin = A0;

bool sw_state1 = 0, last_sw_state1, buttonstate1 = 1, change = 0;
bool sw_state2 = 0, last_sw_state2, buttonstate2 = 1, change2 = 0;
bool state1 = 1, state2 = 1;
unsigned long time1, time2;
int debounceDelay = 40;
bool LED1State = 0;
unsigned long delayTime1;
unsigned long delayA0;

void setup() 
{
pinMode(led1, OUTPUT);  
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(sw1, INPUT); pinMode(sw2, INPUT);
Serial.begin(115200);
}

void checkSw1() {
  sw_state1 = digitalRead(sw1);
  if (sw_state1 != last_sw_state1) {
    time1 = millis();
  }
  if ((millis() - time1) > debounceDelay) {
    if (buttonstate1 != sw_state1) {
      buttonstate1 = sw_state1;
      change = 1;
    }
  }

  if ((buttonstate1 == 0) && (change == 1)) {
    state1 = !state1;
    change = 0;
  }
  if ((buttonstate1 == 1) && (change == 1)) {
    change = 0;
  }
  last_sw_state1 = sw_state1;
}
 
void checkSw2() {
  sw_state2 = digitalRead(sw2);
  if (sw_state2 != last_sw_state2) {
    time2 = millis(); // Store the current time for switch 2
  }
  if ((millis() - time2) > debounceDelay) {
    if (buttonstate2 != sw_state2) {
      buttonstate2 = sw_state2;
      change2 = 1; // Use change2 for switch 2
    }
  }

  if ((buttonstate2 == 0) && (change2 == 1)) {
    state2 = !state2;
    change2 = 0;
  }
  if ((buttonstate2 == 1) && (change2 == 1)) {
    change2 = 0;
  }
  last_sw_state2 = sw_state2;
}

void loop() 
{
  checkSw1();
  if (state1 == 0) {
    digitalWrite(led2, LOW);
  } else {
    digitalWrite(led2, HIGH);
  }

  checkSw2();
  if (state2 == 0) {
    digitalWrite(led3, LOW);
  } else {
    digitalWrite(led3, HIGH);
  }

  if ((millis() - delayTime1) <= 1000) {
    digitalWrite(led1, LED1State);
  } else {
    digitalWrite(led1, LOW);
  }

  if (millis() - delayTime1 > 2000) {
    delayTime1 = millis();
    LED1State = !LED1State; 
  }

  if ((millis() - delayA0) > 500) {
    int sensorValue = analogRead(sensorPin);
    float volt = sensorValue * 5.0 / 1024;
    int outputPWM = map(sensorValue, 0, 1023, 0, 255);
    analogWrite(6, outputPWM);
    Serial.print("ADC:");
    Serial.print(sensorValue);
    Serial.print(" volt:");
    Serial.println(volt);
    delayA0 = millis();
  }
}