SIM900 AT来电显示开启，一些代码

/*Note: this code is a demo for how to using gprs shield to send sms message, dial a voice call and 
  send a http request to the website, upload data to pachube.com by TCP connection,
 
  The microcontrollers Digital Pin 7 and hence allow unhindered
  communication with GPRS Shield using SoftSerial Library. 
  IDE: Arduino 1.0 or later
  Replace the following items in the code:
  1.Phone number, don't forget add the country code
  2.Replace the Access Point Name
  3. Replace the Pachube API Key with your personal ones assigned
  to your account at cosm.com
  */
 
 
#include <SoftwareSerial.h>
#include <String.h>
 
SoftwareSerial mySerial(7, 8);
 
void setup()
{
  mySerial.begin(19200);               // the GPRS baud rate   
  Serial.begin(19200);    // the GPRS baud rate 
  delay(500);
}
 
void loop()
{
  //after start up the program, you can using terminal to connect the serial of gprs shield,
  //if you input 't' in the terminal, the program will execute SendTextMessage(), it will show how to send a sms message,
  //if input 'd' in the terminal, it will execute DialVoiceCall(), etc.
 
  if (Serial.available())
    switch(Serial.read())
   {
     case 't':
       SendTextMessage();
       break;
     case 'd':
       DialVoiceCall();
       break;
     case 'h':
       SubmitHttpRequest();
       break;
     case 's':
       Send2Pachube();
       break;
   } 
  if (mySerial.available())
    Serial.write(mySerial.read());
}
 
///SendTextMessage()
///this function is to send a sms message
void SendTextMessage()
{
  mySerial.print("AT+CMGF=1
");    //Because we want to send the SMS in text mode
  delay(100);
  mySerial.println("AT + CMGS = "+8613616761237"");//send sms message, be careful need to add a country code before the cellphone number
  delay(100);
  mySerial.println("A test message!");//the content of the message
  delay(100);
  mySerial.println((char)26);//the ASCII code of the ctrl+z is 26
  delay(100);
  mySerial.println();
}
 
///DialVoiceCall
///this function is to dial a voice call
void DialVoiceCall()
{
  mySerial.println("ATD+8613616761237;");//dial the number
  delay(100);
  mySerial.println();
}
 
///SubmitHttpRequest()
///this function is submit a http request
///attention:the time of delay is very important, it must be set enough 
void SubmitHttpRequest()
{
  mySerial.println("AT+CSQ");
  delay(100);
 
  ShowSerialData();// this code is to show the data from gprs shield, in order to easily see the process of how the gprs shield submit a http request, and the following is for this purpose too.
 
  mySerial.println("AT+CGATT?");
  delay(100);
 
  ShowSerialData();
 
  mySerial.println("AT+SAPBR=3,1,"CONTYPE","GPRS"");//setting the SAPBR, the connection type is using gprs
  delay(1000);
 
  ShowSerialData();
 
  mySerial.println("AT+SAPBR=3,1,"APN","CMNET"");//setting the APN, the second need you fill in your local apn server
  delay(4000);
 
  ShowSerialData();
 
  mySerial.println("AT+SAPBR=1,1");//setting the SAPBR, for detail you can refer to the AT command mamual
  delay(2000);
 
  ShowSerialData();
 
  mySerial.println("AT+HTTPINIT"); //init the HTTP request
 
  delay(2000); 
  ShowSerialData();
 
  mySerial.println("AT+HTTPPARA="URL","http://122.226.151.4:6543/DHT11data.ashx?c=20.1&h=45.5"");// setting the httppara, the second parameter is the website you want to access
  delay(1000);
 
  ShowSerialData();
 
  mySerial.println("AT+HTTPACTION=0");//submit the request 
  delay(10000);//the delay is very important, the delay time is base on the return from the website, if the return datas are very large, the time required longer.
  //while(!mySerial.available());
 
  ShowSerialData();
 
  mySerial.println("AT+HTTPREAD");// read the data from the website you access
  delay(300);
 
  ShowSerialData();
 
  mySerial.println("");
  delay(100);
}
 
///send2Pachube()///
///this function is to send the sensor data to the pachube, you can see the new value in the pachube after execute this function///
void Send2Pachube()
{
  mySerial.println("AT+CGATT?");
  delay(1000);
 
  ShowSerialData();
 
  mySerial.println("AT+CSTT="CMNET"");//start task and setting the APN,
  delay(1000);
 
  ShowSerialData();
 
  mySerial.println("AT+CIICR");//bring up wireless connection
  delay(3000);
 
  ShowSerialData();
 
  mySerial.println("AT+CIFSR");//get local IP adress
  delay(2000);
 
  ShowSerialData();
 
  mySerial.println("AT+CIPSPRT=0");
  delay(3000);
 
  ShowSerialData();
 
  mySerial.println("AT+CIPSTART="tcp","api.cosm.com","8081"");//start up the connection
  delay(2000);
 
  ShowSerialData();
 
  mySerial.println("AT+CIPSEND");//begin send data to remote server
  delay(4000);
  ShowSerialData();
  String humidity = "1031";//these 4 line code are imitate the real sensor data, because the demo did't add other sensor, so using 4 string variable to replace.
  String moisture = "1242";//you can replace these four variable to the real sensor data in your project
  String temperature = "30";//
  String barometer = "60.56";//
  mySerial.print("{"method": "put","resource": "/feeds/42742/","params"");//here is the feed you apply from pachube
  delay(500);
  ShowSerialData();
  mySerial.print(": {},"headers": {"X-PachubeApiKey":");//in here, you should replace your pachubeapikey
  delay(500);
  ShowSerialData();
  mySerial.print(" "_cXwr5LE8qW4a296O-cDwOUvfddFer5pGmaRigPsiO0");//pachubeapikey
  delay(500);
  ShowSerialData();
  mySerial.print("jEB9OjK-W6vej56j9ItaSlIac-hgbQjxExuveD95yc8BttXc");//pachubeapikey
  delay(500);
  ShowSerialData();
  mySerial.print("Z7_seZqLVjeCOmNbEXUva45t6FL8AxOcuNSsQS"},"body":");
  delay(500);
  ShowSerialData();
  mySerial.print(" {"version": "1.0.0","datastreams": ");
  delay(500);
  ShowSerialData();
  mySerial.println("[{"id": "01","current_value": "" + barometer + ""},");
  delay(500);
  ShowSerialData();
  mySerial.println("{"id": "02","current_value": "" + humidity + ""},");
  delay(500);
  ShowSerialData();
  mySerial.println("{"id": "03","current_value": "" + moisture + ""},");
  delay(500);
  ShowSerialData();
  mySerial.println("{"id": "04","current_value": "" + temperature + ""}]},"token": "lee"}");
 
 
  delay(500);
  ShowSerialData();
 
  mySerial.println((char)26);//sending
  delay(5000);//waitting for reply, important! the time is base on the condition of internet 
  mySerial.println();
 
  ShowSerialData();
 
  mySerial.println("AT+CIPCLOSE");//close the connection
  delay(100);
  ShowSerialData();
}
 
void ShowSerialData()
{
  while(mySerial.available()!=0)
    Serial.write(mySerial.read());
}

#include <SoftwareSerial.h>
#include <String.h>
 
SoftwareSerial GPRS(7, 8);
String currentLine = ""; // string to hold the text from server
String triggerNo="13616761237";
String mobile = "";  
boolean readingNo=false;
long lastTriggerTime=0;
boolean fireing=false;
int led=4;
void setup()
{
  GPRS.begin(19200);               // the GPRS baud rate   
  Serial.begin(19200);    // the GPRS baud rate 
  pinMode(led,OUTPUT);
  digitalWrite(led,LOW);
  delay(500);
  powerUpOrDown();
}
void loop()
{
  if(fireing){
    if(  millis() - lastTriggerTime >= 12 * 1000){
     Serial.println("stop fire!"); 
     digitalWrite(led,LOW);
    fireing=false;
    }else{
     return; 
    }
  }
  
  
  while(GPRS.available()){
     char inChar=GPRS.read();
     currentLine +=inChar;
   
     if(inChar=='
')currentLine="";
     
     if(currentLine.endsWith( "+CLIP: "")){
       readingNo=true;
       mobile="";
     }
     
     if(readingNo){
       
       if(inChar !=','){
         if(inChar !='"')mobile+=inChar;
       }else{
         readingNo=false;
         Serial.println(mobile);
         if(mobile==triggerNo){
           lastTriggerTime=millis();
           Serial.println("fire!!"); 
           fireing=true;
           
           currentLine="";
           mobile="";
           delay(1000);
           digitalWrite(led,HIGH);
           delay(4000);
           
           GPRS.println("ATH");
           while(GPRS.available()){
             GPRS.read(); 
           }
           
         }
         
       }
     }
  } 
}

void powerUpOrDown()
{
  pinMode(9, OUTPUT); 
  digitalWrite(9,LOW);
  delay(1000);
  digitalWrite(9,HIGH);
  delay(2000);
  digitalWrite(9,LOW);
  delay(3000);
}

发送：AT+COLP=1，设置被叫号码显示

参考:
http://www.51hei.com/bbs/dpj-30516-1.html
http://www.seeedstudio.com/wiki/GPRS_Shield_V1.0