为什么使用 AT 命令从 Adruino GPRS 连接到 xively 时 TCP 连接一直关闭? [英] Why does TCP connection keep closing while connecting to xively from Adruino GPRS with AT commands?

问题描述

我正在尝试使用 AT 命令将数据从蜂窝连接的 arduino 温度传感器发送到 xively.com.我可以打开 TCP 连接，但它立即关闭.为什么 TCP 连接总是关闭?

I'm trying to send data from a cellular-connected arduino temperature sensor to xively.com using AT commands. I can open the TCP connection, but then it immediately closes. Why does the TCP connection keep closing?

设置:Arduino Uno麦克本Seeedstudio gprs v2.0att gophone sim卡

setup: arduino uno mackbook seeedstudio gprs v2.0 att gophone sim card

这是我的终端读数:

Call Ready
AT

OK
AT+CPIN?

+CPIN: READY

OK
AT+CGATT?

+CGATT: 1

OK
AT+CIPSHUT

SHUT OK
AT+CIPSTATUS

OK

STATE: IP INITIAL
AT+CIPMUX=0

OK
AT+CSTT="wap.cingular"

OK
AT+CIICR

OK
AT+CIFSR

10.52.49.206
AT+CIPSTART="TCP","api.xively.com","80"

OK

STATE: TCP CLOSED

我的设置:SEEEDStudio GPRS 屏蔽Arduino Unomacbook

my setup: SEEEDStudio GPRS shield Arduino Uno macbook

为了向 sheild 发送 AT 命令，我使用以下代码设置了一个串行继电器:

To send AT commands to the sheild, I have set up a serial relay using the following code:

//Serial Relay - Arduino will patch a 
//serial link between the computer and the GPRS Shield
//at 19200 bps 8-N-1
//Computer is connected to Hardware UART
//GPRS Shield is connected to the Software UART 

#include <SoftwareSerial.h>

SoftwareSerial GPRS(7, 8);
unsigned char buffer[64]; // buffer array for data recieve over serial port
int count=0;     // counter for buffer array 
void setup()
{
  GPRS.begin(19200);               // the GPRS baud rate   
  Serial.begin(19200);             // the Serial port of Arduino baud rate.

}

void loop()
{
  if (GPRS.available())              // if date is comming from softwareserial port ==> data is comming from gprs shield
  {
    while(GPRS.available())          // reading data into char array 
    {
      buffer[count++]=GPRS.read();     // writing data into array
      if(count == 64)break;
  }
    Serial.write(buffer,count);            // if no data transmission ends, write buffer to hardware serial port
    clearBufferArray();              // call clearBufferArray function to clear the storaged data from the array
    count = 0;                       // set counter of while loop to zero


  }
  if (Serial.available())            // if data is available on hardwareserial port ==> data is comming from PC or notebook
    GPRS.write(Serial.read());       // write it to the GPRS shield
}
void clearBufferArray()              // function to clear buffer array
{
  for (int i=0; i<count;i++)
    { buffer[i]=NULL;}                  // clear all index of array with command NULL
}

然后我输入命令并使用 CoolTerm 监控串行通信.

I then enter the commands and monitor serial communication with CoolTerm.

推荐答案

这对我有用:

send AT+CGREG? until you get +CGREG: 0,1
send AT+CGATT? response +CGATT: 1
send AT+CSTT="internet","","" response OK
send AT+CIICR response OK
send AT+CIFSR response IP address
send AT+CIPSTART="TCP","api.xively.com","80" response CONNECT OK

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