利用人体红外监测装置，如果深夜有人靠近，则利用蜂鸣器报警，如果并不是恶意侵犯，那么通过触摸传感器接触警报。

轻轻触摸开关，就可以关闭小蘑菇警报器

可以在宿舍守护各位宝宝的安全

#define sensorPin 6

#define buzzer_pin 4

#include

int pin2 = 2;

int state;

int pushButton =2;

void pin2Interrupt(void) {

/* 中断唤醒 */

/*当中断引脚为低电平时关闭中断*/

Serial.println("wake up!!!");

detachInterrupt(0);

}

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

* Name: enterSleep

* Returns: Nothing.

* Parameters: None.

* Description: Enters the arduino into sleep mode.

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

void enterSleep(void) {

attachInterrupt(0, pin2Interrupt, LOW);

delay(100);

set_sleep_mode(SLEEP_MODE_PWR_DOWN);

sleep_enable();

sleep_mode();

sleep_disable();

}

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

* Name: setup

* Returns: Nothing.

* Parameters: None.

* Description: Setup for the Arduino.

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

void setup() {

Serial.begin(9600);

/* Setup the pin direction. */

pinMode(pin2, INPUT);

Serial.println("Initialisation complete.");

pinMode(sensorPin, INPUT);

Serial.begin(9600);

pinMode(buzzer_pin,OUTPUT);

pinMode(pushButton, INPUT);

}

void loop()

{

state = digitalRead(sensorPin);

if (state == 1){

Serial.println("Somebody is in this area!");

for(int i=200;i<=800;i++) //用循环的方式将频率从200HZ 增加到800HZ

{

tone(buzzer_pin,i); //在四号端口输出频率

int buttonState = digitalRead(pushButton);

Serial.println(buttonState);

if(buttonState == 0){

Serial.println("Entering sleep");

enterSleep();

}

delay(5); //该频率维持5毫秒

}

}

else

Serial.println("No one!");

delay(1000);

}