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： [e-mail] 电话：[phone] 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。