1、输入定时延时函数数值。2、为了模拟，输出为13，板子上面有LED观察，可改为其它引脚为继电器输出。
3、2、3设定为定时开始和停止按键。
由于要求未说明白，本例使用MsTimer2定时器和硬件中断，以提高稳定性。

1. #include <MsTimer2.h>
   
2. // 设定各类函数，定时、开始、停止、执行
   
3. volatile int atime;
   
4. volatile boolean start;
   
5. volatile boolean stop;
   
6. volatile boolean led;
   
7. 
   
8. void msTimer2_func() {
   
9.   start = start;
   
10.   digitalWrite(13,start);
    
11. }
    
12. 
    
13. void attachInterrupt_fun_RISING_2() {
    
14.   // MsTime2定时器
    
15.   MsTimer2::set(atime, msTimer2_func);
    
16.   MsTimer2::start();
    
17. }
    
18. 
    
19. void attachInterrupt_fun_RISING_3() {
    
20.   MsTimer2::stop();
    
21.   digitalWrite(13,stop);
    
22. }
    
23. 
    
24. void setup(){
    
25.   atime = 5000;//定时时间设定
    
26.   start = true;
    
27.   stop = false;
    
28.   led = true;
    
29.   pinMode(2, INPUT_PULLUP);
    
30.   pinMode(13, OUTPUT);//执行输出
    
31.   pinMode(3, INPUT_PULLUP);
    
32.   interrupts();// 硬件中断，2、3接开始和停止按钮
    
33.   attachInterrupt(digitalPinToInterrupt(2),attachInterrupt_fun_RISING_2,RISING);
    
34.   attachInterrupt(digitalPinToInterrupt(3),attachInterrupt_fun_RISING_3,RISING);
    
35. }
    
36. 
    
37. void loop(){
    
38. 
    
39. }

复制代码

看能否适用这个要求。
[color=rgba(0, 0, 0, 0.85)]

给你个参考。

int led_pin = 18;
int relay_pin = 12;
int sensor_pin = 4;

bool detected = false;
bool stop_relay = false;
unsigned long motion_stopped_time = 0; //will track the elapsed time after the motion stop

void setup() {
  pinMode(led_pin, OUTPUT);
  pinMode(relay_pin, OUTPUT);
  pinMode(sensor_pin, INPUT_PULLUP);
  Serial.begin(9600);
}


void loop(){

  if(digitalRead(sensor_pin) == HIGH){ //the sensor has detected motion

        //enclose the code here so it only executes once when motion is detected
        if(detected == false){
            Serial.println("Motion detected!");
            detected = true;

            digitalWrite(led_pin, HIGH); //turn led on
            digitalWrite(relay_pin, HIGH); //switch the relay on

        }

  }else{ //the sensor has stopped detecting motion

      if(detected == true){ //execute this only once when motion stops
            Serial.println("Motion stopped!");
            detected = false;

            digitalWrite(led_pin, LOW); //turn the led off

            motion_stopped_time = millis(); //remember the current time
            stop_relay = true;

       }else{
          if(stop_relay == true){ // ensures that this block will only execute once after the delay timer logic below

            //the current millis() time is 60sec more than the remembered time when the motion stopped
            if(millis() - motion_stopped_time >= 60000){
                digitalWrite(relay_pin, LOW); //switch the relay off
                stop_relay = false;
            }

          }
       }
  }
}

简单程序直接用等待语句，复杂场合用中断？