A library for talking to Multi-Tech's Cellular SocketModem Devices.
Dependents: M2X_dev axeda_wrapper_dev MTS_M2x_Example1 MTS_Cellular_Connect_Example ... more
cellular/Cellular.cpp
- Committer:
- sgodinez
- Date:
- 2013-12-13
- Revision:
- 13:0af863114629
- Parent:
- 12:40ac31a09132
- Child:
- 17:2d7c4ea7491b
File content as of revision 13:0af863114629:
#ifndef CELLULAR_CPP #define CELLULAR_CPP #include "Cellular.h" #include "MTSText.h" #include <sstream> Cellular::Cellular(MTSBufferedIO& io) : io(io) , echoMode(true) , pppConnected(false) , mode(TCP) , socketOpened(false) , local_port(0) , host_port(0) { } Cellular::~Cellular() { } bool Cellular::connect() { //Check if socket is open if(socketOpened) { return true; } //Run Test first to validate a good state if(isConnected()) { return true; } //Check RSSI: AT+CSQ int rssi = getSignalStrength(); printf("[DEBUG] Signal strength: %d\n", rssi); //Check Registration: AT+CREG? == 0,1 Registration registration = getRegistration(); if(registration != REGISTERED) { printf("[WARNING] Not Registered [%d]\n", (int)registration); } //AT#CONNECTIONSTART: Make a PPP connection printf("[DEBUG] Making PPP Connection Attempt. APN[%s]\n", apn.c_str()); std::string pppResult = sendCommand("AT#CONNECTIONSTART", 120000); printf("[DEBUG] PPP CONNECT RESULT [%s]\n", pppResult.c_str()); std::vector<std::string> parts = Text::split(pppResult, "\r\n"); for(uint32_t i = 0; i < parts.size(); i++) { printf("[%d] [%s]\r\n", i, parts[i].c_str()); } if(pppResult.find("Ok_Info_GprsActivation") != std::string::npos) { if(parts.size() >= 2) { local_address = parts[1]; } printf("[INFO] PPP Connection Established: IP[%s]\n", local_address.c_str()); pppConnected = true; } else { pppConnected = false; } return pppConnected; } void Cellular::disconnect() { } bool Cellular::isConnected() { //1) Check if APN was set if(apn.size() == 0) { printf("[DEBUG] APN is not set\n"); return false; } //1) Check that we do not have a live connection up if(socketOpened) { printf("[DEBUG] Socket is opened\n"); return true; } //2) Query the radio pppConnected = false; std::string result = sendCommand("AT#VSTATE", 1000); if(result.find("CONNECTED") != std::string::npos) { pppConnected = true; } return pppConnected; } bool Cellular::bind(unsigned int port) { return false; } bool Cellular::open(const std::string& address, unsigned int port, Mode mode) { Code portCode, addressCode; //1) Check that we do not have a live connection up if(socketOpened) { printf("[DEBUG] Socket already opened\n"); return true; } //2) Check PPP connection if(!isConnected()) { printf("[ERROR] PPP not established. Attempting to connect\n"); if(!connect()) { printf("[ERROR] PPP connection failed\n"); return false; } else { printf("[DEBUG] PPP connection established\n"); } } //Setup IP Connection std::stringstream ss; if(mode == TCP) { ss << "AT#TCPPORT=1," << port; portCode = sendBasicCommand(ss.str(), 1000); addressCode = sendBasicCommand("AT#TCPSERV=1," + address, 1000); } else { ss << "AT#UDPPORT=1," << port; portCode = sendBasicCommand(ss.str(), 1000); addressCode = sendBasicCommand("AT#UDPSERV=1," + address, 1000); } if(portCode == OK) { host_port = port; } else { printf("[ERROR] Host port could not be set\n"); } if(addressCode == OK) { host_address = address; } else { printf("[ERROR] Host address could not be set\n"); } // Try and Connect string response = sendCommand("AT#OTCP=1", 30000); if (response.find("Ok_Info_WaitingForData") != string::npos) { printf("[INFO] Opened TCP Socket [%s:%d]\n", address.c_str(), port); socketOpened = true; } else { printf("[WARNING] Unable to open TCP Socket [%s:%d]\n", address.c_str(), port); socketOpened = false; } return socketOpened; } bool Cellular::isOpen() { return false; } void Cellular::close() { if(!socketOpened) { return; } //Build Escape Message => DLE ETX char buffer[3] = { 0x10, 0x03, 0x00 }; Code code = sendBasicCommand(buffer, 1000, NONE); if(code != OK) { printf("[WARNING] Radio did not accept close socket command"); //Handle cleanup } socketOpened = false; } int Cellular::read(char* data, int max, int timeout) { return -1; } int Cellular::write(char* data, int length, int timeout) { return -1; } unsigned int Cellular::readable() { return 0; } unsigned int Cellular::writeable() { return 0; } void Cellular::reset() { } Cellular::Code Cellular::test() { Code code = sendBasicCommand("AT", 1000); if(code != OK) { printf("[Error] Failed basic AT command"); return code; } //AT#VSTATE != "CHECKING" //AT#GPRSMODE == return OK; } Cellular::Code Cellular::echoOff(bool state) { Code code; if (state) { code = sendBasicCommand("ATE0", 1000); echoMode = (code == OK) ? false : echoMode; } else { code = sendBasicCommand("ATE1", 1000); echoMode = (code == OK) ? true : echoMode; } return code; } int Cellular::getSignalStrength() { string response = sendCommand("AT+CSQ", 1000); if (response.find("OK") == string::npos) { return -1; } int start = response.find(':'); int stop = response.find(',', start); string signal = response.substr(start + 2, stop - start - 2); int value; sscanf(signal.c_str(), "%d", &value); return value; } std::string Cellular::getPhoneNumber() { return "unknown"; } Cellular::Registration Cellular::getRegistration() { string response = sendCommand("AT+CREG?", 1000); if (response.find("OK") == string::npos) { return UNKNOWN; } int start = response.find(','); int stop = response.find(' ', start); string regStat = response.substr(start + 1, stop - start - 1); int value; sscanf(regStat.c_str(), "%d", &value); switch (value) { case 0: return NOT_REGISTERED; case 1: return REGISTERED; case 2: return SEARCHING; case 3: return DENIED; case 4: return UNKNOWN; case 5: return ROAMING; } return UNKNOWN; } Cellular::Code Cellular::sendBasicCommand(string command, int timeoutMillis, ESC_CHAR esc) { string response = sendCommand(command, timeoutMillis, esc); if (response.size() == 0) { return NO_RESPONSE; } else if (response.find("OK") != string::npos) { return OK; } else if (response.find("ERROR") != string::npos) { return ERROR; } else { return FAILURE; } } Cellular::Code Cellular::setApn(const std::string& apn) { Code code = sendBasicCommand("AT#APNSERV=\"" + apn + "\"", 1000); if (code != OK) { return code; } this->apn = apn; return code; } Cellular::Code Cellular::setDns(const std::string& apn) { return FAILURE; } Cellular::Code Cellular::sendSMS(const Sms& sms) { return sendSMS(sms.phoneNumber, sms.message); } Cellular::Code Cellular::sendSMS(const std::string& phoneNumber, const std::string& message) { Code code = sendBasicCommand("AT+CMGF=1", 1000); if (code != OK) { return code; } string cmd = "AT+CMGS=\"+"; cmd.append(phoneNumber); cmd.append("\""); string response1 = sendCommand(cmd, 1000); if (response1.find('>') == string::npos) { return NO_RESPONSE; } wait(.2); string response2 = sendCommand(message, 4000, CTRL_Z); printf("SMS Response: %s\n", response2.c_str()); if (response2.find("+CMGS:") == string::npos) { return FAILURE; } return OK; } std::vector<Cellular::Sms> Cellular::getReceivedSms() { int smsNumber = 0; std::vector<Sms> vSms; std::string received = sendCommand("AT+CMGL=\"ALL\"", 4000); size_t pos = received.find("+CMGL: "); while (pos != std::string::npos) { Cellular::Sms sms; std::string line(Text::getLine(received, pos, pos)); //printf("[DEBUG] Top of SMS Parse Loop. LINE[%s]\n", line.c_str()); if(line.find("+CMGL: ") == std::string::npos) { continue; } //Start of SMS message std::vector<std::string> vSmsParts = Text::split(line, ','); if(vSmsParts.size() != 6) { printf("[WARNING] Expected 6 commas. SMS[%d] DATA[%s]. Continuing ...\n", smsNumber, line.c_str()); continue; } sms.phoneNumber = vSmsParts[2]; sms.timestamp = vSmsParts[4] + ", " + vSmsParts[5]; if(pos == std::string::npos) { printf("[WARNING] Expected SMS body. SMS[%d]. Leaving ...\n", smsNumber); break; } //Check for the start of the next SMS message size_t bodyEnd = received.find("\r\n+CMGL: ", pos); if(bodyEnd == std::string::npos) { //printf("[DEBUG] Parsing Last SMS. SMS[%d]\n", smsNumber); //This must be the last SMS message bodyEnd = received.find("\r\n\r\nOK", pos); } //Safety check that we found the boundary of this current SMS message if(bodyEnd != std::string::npos) { sms.message = received.substr(pos, bodyEnd - pos); } else { sms.message = received.substr(pos); printf("[WARNING] Expected to find end of SMS list. SMS[%d] DATA[%s].\n", smsNumber, sms.message.c_str()); } vSms.push_back(sms); pos = bodyEnd; //printf("[DEBUG] Parsed SMS[%d]. Starting Next at position [%d]\n", smsNumber, pos); smsNumber++; } printf("Received %d SMS\n", smsNumber); return vSms; } Cellular::Code Cellular::deleteOnlyReceivedReadSms() { return sendBasicCommand("AT+CMGD=1,1", 1000); } Cellular::Code Cellular::deleteAllReceivedSms() { return sendBasicCommand("AT+CMGD=1,4", 1000); } string Cellular::sendCommand(string command, int timeoutMillis, ESC_CHAR esc) { int size = command.size() + 1; char cmd[size]; strcpy(cmd, command.c_str()); if (esc == CR) { cmd[size -1] = '\r'; } else if (esc == CTRL_Z) { cmd[size -1] = 0x1A; } else if(esc == NONE) { cmd[size -1] = '\0'; } io.rxClear(); io.txClear(); std::string result; int status = io.write(cmd, size); int available = io.rxAvailable(); int previous = -1; int timer = 0; char tmp[256]; tmp[255] = 0; bool started = !echoMode; bool done = false; do { wait(.1); timer = timer + 100; previous = available; available = io.rxAvailable(); int size = io.read(tmp,255); //1 less than allocated if(size > 0) { result.append(tmp, size); } if(!started) { //In Echo Mode (Command will have echo'd + 2 characters for \r\n) if(result.size() > command.size() + 2) { started = true; } } else { done = (available == previous); } if(timer >= timeoutMillis) { printf("[WARNING] sendCommand timed out after %d milliseconds\n", timeoutMillis); done = true; } } while (!done); return result; } #endif /* CELLULAR_CPP */