File content as of revision 0:0e1ee46c6ffb:

#include "mbed.h"
#include "string.h"

#define MAX_READ_LEN 256
#define SEVER "122.5.17.146"
#define PORT 9961

DigitalOut myled(LED1);
Timer timer;
Serial pc(USBTX,USBRX,9600);
Serial sim(PA_9,PA_10,115200);

char readBuf[MAX_READ_LEN];
int  bufPtr;
bool revOK;

enum rxMode{
    CMDMODE = 0;
    GPSMODE = 1;
};

void uartIrq()
{
    while(sim.readable()&&bufPtr<MAX_READ_LEN)
    {    
        char buf = sim.getc();
        if(buf!='\r'&&buf!='\n')
        {
            readBuf[bufPtr++] = buf;
        }
        if(buf=='\n')
        {
            readBuf[bufPtr] = 0;
            bufPtr = 0;
            revOK = true;
        }
    }
}

int getReply(uint16_t timeOut=1000)
{
    int begin;
    timer.start();
    begin = timer.read_ms();
    while(!revOK)
    {
        if(timer.read_ms()-begin>timeOut)
        {
            timer.stop();
            return 0;  //time out;    
        }
    }
    timer.stop(); 
    revOK = false;
    return 1;  
}

bool expectReply(char* eptReply,uint16_t timeOut,uint8_t mulNum=2)
{
    for(int i=0;i<mulNum;i++)
    {
        getReply(timeOut);
        if(0!=strstr(readBuf,eptReply))
        {
            return true;    
        }
    }
    return false;
}

int sendCheckReply(char* cmd,char* reply,uint16_t timeOut=1000)
{    
    sim.printf("%s\r\n",cmd);         
    return expectReply(reply,timeOut,5);
}

bool TCPconnect(char *server, uint16_t port)
{
    if (! sendCheckReply("AT+CIPSHUT", "SHUT OK", 5000) ) 
        return false;
    //pc.printf("%s\r\n",readBuf);
    
    if (! sendCheckReply("AT+CIPMUX=0", "OK") ) 
        return false;  
    
    sim.printf("AT+CIPSTART=\"TCP\",\"%s\",%d\r\n",server,port);
    if (! expectReply("OK",1000,2)) return false;
    if (! expectReply("CONNECT OK",1000,3)) return false;
    return true;
}

bool init()
{
    for(int i=0;i<3;i++)    
    {
        if(sendCheckReply("AT","OK"))
        {
            return true;
        }
        wait(0.5);
    }
    return false;
}

bool TCPsend(char*sendData)
{
    if(sendCheckReply("AT+CIPSTATUS","CONNECT OK"))    
    {
        sendCheckReply("AT+CIPSEND",">");
        sim.printf("%s\r\n",sendData);
        sim.printf("%c\r\n",char(0x1a));
        if(expectReply("SEND OK",1000,5))
        {
//            pc.printf("SEND OK\r\n");
            return true;
        }
        else 
        {
//            pc.printf("SEND FAIL:%s\r\n",readBuf);
            return false;
        }
    }
    return false;
}

bool TCPclose()
{
    if(sendCheckReply("AT+CIPCLOSE","CLOSE OK"))    
    {
        return true;    
    }
    else
    {
        return false;
    }
}

int main() {
    sim.attach(&uartIrq,Serial::RxIrq);
    pc.printf("Hello World!\r\n");
    while(pc.readable())
        pc.getc();
    if(init())
        pc.printf("init OK\r\n");
    else
        pc.printf("init failed!please try again later!\r\n");
    if(TCPconnect(SEVER,PORT))
        pc.printf("TCPconnect OK\r\n");
    else
        pc.printf("TCPconnect Fail\r\n");    
    if(TCPsend("I Love Juan"))
        pc.printf("Send OK\r\n");
    else
        pc.printf("Send Fail\r\n");
    while(1) {
        myled = !myled;
        wait(1);
    }
}