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。

/ex_net/article/details/8586348

作者：张建波 邮箱： 281451020@ 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25int 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;}}#endregionprivate 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1000GsmWrite(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;}}}#endregionprivate 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。

/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。