分享一个GSM短信猫接口程序
分享一个GSM短信猫接口程序
本系列文章由ex_net（张建波）编写，转载请注明出处。
http://blog.csdn.net/ex_net/article/details/8586348
作者：张建波 邮箱： [email protected] 电话：13577062679 欢迎来电交流！
市面上的短信猫，大多是TC35i、Tc35的模块。下面的程序主要是针对西门子的TC35系列的GSM模块。GSM模块的通讯采用AT指令。上位机（PC、单片机、ＡＲＭ等）通过串口与GSM模块连接。
上图是TC35i模块，淘宝上大多短信猫的里面都是这个模块+232电平转换电路+SIM卡座+天线部分等。
基于GSM短信的应用很多，例如远程控制、数据采集等等。GSM短信猫编程的难点在与“程序与GSM”通讯是异步的。
例如：
AT+CSQ 查询信号指令，ＰＣ通过ＲＳ２３２串口发送后，GSM短信猫要等一小会才回答，而且还可能不回答。
这样一来就导致编程复杂了。
下面的程序采用了串口中断接收、定时器、线程的方式配合。实现了接收短信，并把接收到的短信存在数据库中。然后定期发送短信。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace SMS
{
public class GSMModem
{
private string protName;
private int BaudRate;
private System.Collections.ArrayList alRecevingSM;// 短信接收 缓冲区
private System.Collections.ArrayList alSendSM; // 短信【待】发送 缓冲区
private System.Collections.ArrayList alAuthorizationNumber; //授权号码，系统只会回复授权号码
int WORK_STATE;//短信猫工作状态
//错误的短信数，主要是未经授权的号码发来的短信
private int ErrorSMCount = 0;
public int _ErrorSMCount
{
get
{
return ErrorSMCount;
}
}
/// <summary>
/// 0=自检
/// 1=接收
/// 2=发送
/// </summary>
public int _WORK_STATE
{
get
{
return WORK_STATE;
}
}
//接收和发送定时器不能同时工作，切记
//短信接收 轮询 定时器，定时发送 AT+CGMR={0}
System.Windows.Forms.Timer revTimer = new System.Windows.Forms.Timer();
//短信发送 队列 定时器，定时发送 AT+CMGS={0}
System.Windows.Forms.Timer sendTimer = new System.Windows.Forms.Timer();
//短信猫自检
System.Windows.Forms.Timer selfCheckingTimer = new System.Windows.Forms.Timer();
//短信猫连接设备端口
System.IO.Ports.SerialPort Port = new System.IO.Ports.SerialPort();
//短信猫串口接收缓冲
/*备注：该缓冲变量由串口DataReceived事件负责接收，具体的处理过程由
* Timer 定时器内的代码具体执行
*/
string temp_gsm_str_buf = "";
//
int CMGD_MAX_ID = 0;//短信卡最大SM容量，通常情况下设置为25
int CMGD_ID = 1; //当前串口发送读取的短信ID号
int GSM_RST_ACT = 0;
int GSM_MAX_RST_ACT = 8;
int CGMS_Count = 0; //短信发送数量
public int _CGMS_Count
{
get
{
return CGMS_Count;
}
}
public int _CMGD_MAX_ID
{
get
{
return CMGD_MAX_ID;
}
}
public int _CMGD_ID
{
get
{
return CMGD_ID;
}
}
public int _GSM_RST_ACT
{
get
{
return GSM_RST_ACT;
}
}
public int _GSM_MAX_RST_ACT
{
get
{
return GSM_MAX_RST_ACT;
}
}
#region 短信猫工作状态
string INF_GSM_CSQ;
string INF_GSM_CSCS;
string INF_GSM_CSCA;
string INF_GSM_CNMI;
bool INF_GSM_State;
public string _INF_GSM_CSQ
{
get
{
return INF_GSM_CSQ;
}
}
public string _INF_GSM_CSCS
{
get
{
return INF_GSM_CSCS;
}
}
public string _INF_GSM_CSCA
{
get
{
return INF_GSM_CSCA;
}
}
public string _INF_GSM_CNMI
{
get
{
return INF_GSM_CNMI;
}
}
public bool _INF_GSM_State
{
get
{
return INF_GSM_State;
}
}
#endregion
private int _CmgsSleepTime;
public GSMModem(string protName,
string BaudRate,
int CMGD_MAX_ID,
System.Collections.ArrayList RecevingSM,
System.Collections.ArrayList SendSM,
int revTimerInterval,
int sendTimerInterval,
int selfCheckingTimerInterval,
int CmgsSleepTime,
System.Collections.ArrayList alAuthorizationNumber
)
{
_CmgsSleepTime = CmgsSleepTime;//AT+CMGS 指令发送后，稍微延迟一定时间，让短信猫做出反应
this.alAuthorizationNumber = alAuthorizationNumber;//保存授权号码
this.CMGD_MAX_ID = CMGD_MAX_ID;
this.protName = protName;
this.BaudRate = int.Parse(BaudRate);
this.alRecevingSM = RecevingSM;
this.alSendSM = SendSM;
selfCheckingTimer.Enabled = false;
revTimer.Interval = revTimerInterval;
revTimer.Enabled = false;
sendTimer.Interval = sendTimerInterval;
sendTimer.Enabled = false;
revTimer.Tick += revTimer_Tick; //挂接短信轮询 定时器
sendTimer.Tick += sendTimer_Tick;
selfCheckingTimer.Interval = selfCheckingTimerInterval;
selfCheckingTimer.Tick += selfCheckingTimer_Tick;
Port.DataReceived += Port_DataReceived;
}
public bool Start()
{
try
{
Port.PortName = protName;
Port.BaudRate = BaudRate;
Port.Open();//打开串口
//短信猫 先自检，自检成功了，才能进行 接收 或 发送
selfCheckingTimer.Enabled = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return false;
}
return false;
}
public bool Stop()
{
sendTimer.Enabled = false;
revTimer.Enabled = false;
selfCheckingTimer.Enabled = false;
Port.Close();
CMGD_ID = 1;
alRecevingSM.Clear();
alSendSM.Clear();
ErrorSMCount = 0;
return true;
}
void Port_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
System.IO.Ports.SerialPort serialPort = Port;
int len = serialPort.BytesToRead;
byte[] bs = new byte[len];
serialPort.Read(bs, 0, len);
if (len == 0)
{
return;
}
else
{
//接收处理
string r = Encoding.ASCII.GetString(bs, 0, len);
temp_gsm_str_buf += r;
//接收数据处理
//txtGsmRevLog.Invoke(new EventHandler(DoUpdate), r); //线程处理
Console.Write(r);
}
}
private bool AuthorizationPhoneNumber(string phoneID)
{
for (int i = 0; i < alAuthorizationNumber.Count; i++)
{
string s = alAuthorizationNumber[i].ToString();
if (phoneID.Equals(s))
return true;
}
return false;
}
bool DoGsmDataReceived()
{
//短信猫发回数据处理
string str = temp_gsm_str_buf;
if (str.Trim().StartsWith("+CMGR"))
{
int P1 = str.IndexOf("0891");
if (P1 != -1)
{
str = str.Substring(P1);
int P2 = str.IndexOf("\r\n");
if (P2 != -1)
{
string uPDU = str.Substring(0, P2);
string decMsg = PDUDecoding.DecodingMsg(uPDU);
string[] content = decMsg.Split(',');
string stime = content[1].ToString();
string sphoneId = content[0].ToString().Replace("+86", "");
string sgsmtxt = content[2].ToString();
//object[] row = { stime, sphoneId, sgsmtxt };
if (AuthorizationPhoneNumber(sphoneId))
{
SMDATA sm = new SMDATA();
sm.sTime = stime;
sm.sPoneID = sphoneId;
sm.sContent = sgsmtxt;
sm.pdu = uPDU;
sm.sType = "Admin";
alRecevingSM.Add(sm);
}
else
{
//未经授权的用户，10086短信，广告信息，垃圾短信，用户手机号码
string[] gsmCmd = sgsmtxt.Trim().Split('+');
string cmd = gsmCmd[0].ToString();
if (cmd == "CX")
{
if (gsmCmd.Length == 1)
{
//仅限 用户手机号码
SMDATA sm = new SMDATA();
sm.sTime = stime;
sm.sPoneID = sphoneId;
sm.sContent = "CX"; //让BI查询车辆信息
sm.pdu = uPDU;
sm.sType = "User";
alRecevingSM.Add(sm);
}
}
else
{
Console.WriteLine("Error:" + stime + " " + sphoneId + " " + sgsmtxt);
ErrorSMCount++;
}
}
return true;
}
}
}
else
{
}
return false;
}
bool DoGsmDataSend()
{
//短信猫发回数据处理
string str = temp_gsm_str_buf;
if (str.Trim().IndexOf("+CMGS") > -1)
{
temp_gsm_str_buf = "";
CGMS_Count++;
return true;
}
else
{
//接收到错误信息，可能是短信发送失败
}
temp_gsm_str_buf = "";
return false;
}
//短信发送 指令发送定时器
int SendID;
int AT_CMGS_LEN;
void sendTimer_Tick(object sender, EventArgs e)
{
WORK_STATE = 2;//设置短信猫工作模式为 发送
if (DoGsmDataSend())
{
alSendSM.RemoveAt(SendID);
}
//没有发送的短信了
if (alSendSM.Count == 0)
{
CMGD_ID = 1;
sendTimer.Enabled = false; //关闭发送
revTimer.Enabled = true; //打开接收
}
else
{
SendID = 0;
SMDATA sendSM = (SMDATA)alSendSM[SendID];
string sPoneID = sendSM.sPoneID;
string sContent = sendSM.sContent;
string msg = sContent;
string pdu = PDUDecoding.GetPDUMsg(sPoneID, msg);
AT_CMGS_LEN = PDUDecoding.getLenght(msg);
GsmWrite(string.Format("AT+CMGS={0}\r", AT_CMGS_LEN.ToString()));
Thread.Sleep(_CmgsSleepTime); //500延时，如果短信猫反应慢，设置为1000
GsmWrite(pdu + "\r");
}
}
//短信轮询 指令发送定时器
void revTimer_Tick(object sender, EventArgs e)
{
//定时器每中断1次，接收1条指令
WORK_STATE = 1;//设置短信猫工作模式为 接收
if (DoGsmDataReceived())
{
int old_CMGD_ID = CMGD_ID - 1;
GsmWrite("AT+CMGD=" + old_CMGD_ID.ToString() + "\r");
Thread.Sleep(1000);
}
if (CMGD_ID > CMGD_MAX_ID)
{
revTimer.Enabled = false;//停止接收
sendTimer.Enabled = true;//启动短信发送
}
else
{
//再读取下一条
temp_gsm_str_buf = "";
GsmWrite("AT+CMGR=" + CMGD_ID.ToString() + "\r");
CMGD_ID++;
}
}
#region 短信猫初始信息
private void selfCheckingTimer_Tick(object sender, EventArgs e)
{
//先处理串口接收的数据
//Console.WriteLine(temp_gsm_str_buf);
WORK_STATE = 0; //设置工作状态为自检
string str = "";
if (temp_gsm_str_buf.Length > 0)
{
int CSQ = temp_gsm_str_buf.IndexOf("+CSQ");
if (CSQ > -1)
{
str = temp_gsm_str_buf.Substring(CSQ);
string[] content = str.Trim().Split(':');
if (content.Length > 1)
{
INF_GSM_CSQ = content[1].ToString().Replace("OK", "").Replace("\r\n", "").Replace("\"", "");
GSM_RST_ACT++;
}
temp_gsm_str_buf = "";
}
int CSCS = temp_gsm_str_buf.IndexOf("+CSCS");
if (CSCS > -1)
{
str = temp_gsm_str_buf.Substring(CSCS);
string[] content = str.Trim().Split(':');
if (content.Length > 1)
{
INF_GSM_CSCS = content[1].ToString().Replace("OK", "").Replace("\r\n", "").Replace("\"", "");
GSM_RST_ACT++;
}
temp_gsm_str_buf = "";
}
int CSCA = temp_gsm_str_buf.IndexOf("+CSCA");
if (CSCA > -1)
{
str = temp_gsm_str_buf.Substring(CSCA);
string[] content = str.Trim().Split(':');
if (content.Length > 1)
{
INF_GSM_CSCA = content[1].ToString().Replace("OK", "").Replace("\r\n", "").Replace("\"", "");
GSM_RST_ACT++;
}
temp_gsm_str_buf = "";
}
int CNMI = temp_gsm_str_buf.IndexOf("+CNMI");
if (CNMI > -1)
{
str = temp_gsm_str_buf.Substring(CNMI);
string[] content = str.Trim().Split(':');
if (content.Length > 1)
{
INF_GSM_CNMI = content[1].ToString().Replace("OK", "").Replace("\r\n", "");
GSM_RST_ACT++;
}
temp_gsm_str_buf = "";
}
}
//
switch (GSM_RST_ACT)
{
case 0: { GsmWrite("ATE0\r"); GSM_RST_ACT++; break; }
case 1: { GsmWrite("AT+CSQ\r"); break; }
case 2: { GsmWrite("AT+CMGF=1\r"); GSM_RST_ACT++; break; }
case 3: { GsmWrite("AT+CSCS?\r"); break; }
case 4: { GsmWrite("AT+CSCA?\r"); break; }
case 5: { GsmWrite("AT+CMGF=0\r"); GSM_RST_ACT++; break; }
//AT+CNMI=0,0,0,0
//case 6: { GsmWrite("AT+CNMI=3,1,0,0\r"); GSM_ACT++; break; }
case 6: { GsmWrite("AT+CNMI=0,0,0,0\r"); GSM_RST_ACT++; break; }
case 7: { GsmWrite("AT+CNMI?\r"); break; }
case 8:
{
INF_GSM_State = true;
selfCheckingTimer.Enabled = false;
revTimer.Enabled = true;//启动 接收
//btnSendTestSM.Enabled = true;
//checkBox1.Enabled = true;
//btnSendTestSM.Enabled = true;
//timer_gsm_REST.Enabled = false;
break;
}
default:
{
selfCheckingTimer.Enabled = false;
//timer_gsm_REST.Enabled = false;
INF_GSM_State = false;
MessageBox.Show("短信猫自检失败!");
break;
}
}
}
#endregion
private void GsmWrite(string str)
{
Port.Write(str);
Console.Write(str);
}
public int GetSMCount()
{
return alRecevingSM.Count;
}
}
}
在短信接收上，上面的代码实现了对垃圾号码、或着非授权号码进行了简单过滤。
另外附上一个机遇W77E58单片机+GPS+GSM做的一个远程定位系统的资料，虽然已经很“老土”了。
http://blog.csdn.net/ex_net/article/details/2765895
可以供大家参考PC机、单片机和GSM的通信处理方式。