关于：

我一直想要做一个东西来即时的通过手机或者邮件通知我谁在敲我的门铃，因为我经常会因为各种各样的原因而错过那些想要来我家拜访的人。

使用这个智能门铃，你将永远都不会错过任何想要拜访你的人。

使用一个Arduino 和以太网把门铃按钮连接到互联网，然后系统通过APP连接到云端，APP有IOS 和安卓端。所以当门铃按钮被按下的时候，系统就会发送一个email或者给手机发送一个推送。

APP的名字叫Blynk，下面是APP的地址：

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Arduino代码如下：

[mw_shl_code=cpp,true]#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <SimpleTimer.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "YourAuthToken";

SimpleTimer timer;

WidgetLCD lcd(V1);

void setup()
{
Serial.begin(9600);
Blynk.begin(auth);

while (Blynk.connect() == false) {
// Wait until connected
}
}
void notifyOnButtonPress()
{
// Invert state, since button is "Active LOW"
int isButtonPressed = !digitalRead(2);
if (isButtonPressed) {
BLYNK_LOG("Button is pressed.");

Blynk.notify("Please open up! Somebody is on the door!");
lcd.clear(); //Use it to clear the LCD Widget
lcd.print(4, 0, "Open"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
lcd.print(4, 1, "The Door!");
}
}

void emailOnButtonPress()
{

int isButtonPressed = !digitalRead(2); // Invert state, since button is "Active LOW"

if (isButtonPressed) // You can write any condition to trigger e-mail sending
{
BLYNK_LOG("Button is pressed."); // This can be seen in the Serial Monitor
Blynk.email("kaustubhagarwal18@gmail.com", "Subject: Doorbell", "Please open up! Somebody is on the door!");
lcd.clear(); //Use it to clear the LCD Widget
lcd.print(4, 0, "Open"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
lcd.print(4, 1, "The Door!");

}
}

void loop() {
// put your main code here, to run repeatedly:
Blynk.run();
timer.run();
}[/mw_shl_code]