File content as of revision 9:5b12c5a8dde4:

#ifndef CELLULAR_CPP
#define CELLULAR_CPP

#include "Cellular.h"
#include "MTSText.h"

Cellular::Cellular(MTSBufferedIO& io) : io(io)
{
}

Cellular::~Cellular()
{
}

Cellular::Code Cellular::ATTest()
{
    return sendBasicCommand("AT", 1000);
}

Cellular::Code Cellular::echoOff(bool state)
{
    if (state) {
        return sendBasicCommand("ATE0", 1000);
    } else {
        return sendBasicCommand("ATE1", 1000);
    }
}

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;
}

int Cellular::connect(string host, int port)
{
    // Set the Server Address
    string hostCmd = "AT#TCPSERV=1,\"";
    hostCmd.append(host);
    hostCmd.append("\"");
    if (sendBasicCommand(hostCmd, 1000) != OK) {
        return -1;
    }

    // Set the Server Port
    string portCmd = "AT#TCPPORT=1,\"";
    char tmp[7];
    if (sprintf(tmp, "%d", port) < 0) {
        return -1;
    }
    portCmd.append(string(tmp));
    portCmd.append("\"");
    if (sendBasicCommand(portCmd, 1000) != OK) {
        return -1;
    }

    // Try and Connect
    string response = sendCommand("AT#OTCP=1", 2000);
    if (response.find("Ok_Info_WaitingForData") != string::npos) {
        return 0;
    } else {
        return -1;
    }
}

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::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;
    }

    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;
    
    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);
        }
    } while (available != previous && timer < timeoutMillis);
    
    return result;
}

#endif /* CELLULAR_CPP */