const int buttonPin = 4; // 假设按钮连接到数字引脚4
const int led1 = 5; // 假设按钮连接到数字引脚4
const int led2 = 6; // 假设按钮连接到数字引脚4
unsigned long startTime = 0; //定义起始时间
unsigned long lastButtonPressTime = 0;  
int time=10;//倒计时时间，初始为10
void setup() {
  // put your setup code here, to run once:
   pinMode(buttonPin, INPUT_PULLUP); // 设置按钮引脚为输入并启用内部上拉电阻  
   Serial.begin(9600);
   pinMode(led1, OUTPUT);
   pinMode(led2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(buttonPin)==LOW){
    delay(500);//按键消抖时间，一定要消抖，不然会误触，消抖时间需实际调试
    
    
    startTime=millis();
    while(millis()-startTime <=3000)
    {
      delay(100);
      digitalWrite(led1, HIGH);
      Serial.println(time);
      
      if(digitalRead(buttonPin)==LOW)
      {
        digitalWrite(led2, HIGH);
        time+=10;
        if(time>60){
          time=10;
        }
        Serial.println(time);//屏幕时间显示
        startTime=millis();//将开始时间重置为最新按下按键的时候。
        continue; 
      }
    digitalWrite(led1, LOW);
    
    digitalWrite(led2, LOW);
    
    }
    Serial.println("烘干函数");
    daojishi(time);
    Serial.println("停止函数");

}

}
void daojishi(int x){
  for(x;x>0;x--){
    Serial.println(x);
    delay(1000);
  }


}