TinyGsmClientSIM800.h

 
#ifndef TinyGsmClientSIM800_h
#define TinyGsmClientSIM800_h
 
//#define TINY_GSM_DEBUG Serial
//#define TINY_GSM_USE_HEX
 
#if !defined(TINY_GSM_RX_BUFFER)
#define TINY_GSM_RX_BUFFER 64
#endif
 
#define TINY_GSM_MUX_COUNT 5
 
#include "TinyGsmCommon.h"
 
#define GSM_NL "\r\n"
static const char GSM_OK[] TINY_GSM_PROGMEM = "OK" GSM_NL;
static const char GSM_ERROR[] TINY_GSM_PROGMEM = "ERROR" GSM_NL;
 
enum SimStatus {
    SIM_ERROR = 0,
    SIM_READY = 1,
    SIM_LOCKED = 2,
};
 
enum RegStatus {
    REG_UNREGISTERED = 0,
    REG_SEARCHING    = 2,
    REG_DENIED       = 3,
    REG_OK_HOME      = 1,
    REG_OK_ROAMING   = 5,
    REG_UNKNOWN      = 4,
};
 
 
class TinyGsmSim800
{
 
public:
 
    class GsmClient : public Client
    {
        friend class TinyGsmSim800;
        typedef TinyGsmFifo<uint8_t, TINY_GSM_RX_BUFFER> RxFifo;
 
    public:
        GsmClient() {}
 
        GsmClient(TinyGsmSim800& modem, uint8_t mux = 1)
        {
            init(&modem, mux);
        }
 
        bool init(TinyGsmSim800* modem, uint8_t mux = 1)
        {
            this->at = modem;
            this->mux = mux;
            sock_available = 0;
            prev_check = 0;
            sock_connected = false;
            got_data = false;
 
            at->sockets[mux] = this;
 
            return true;
        }
 
    public:
        virtual int connect(const char *host, uint16_t port)
        {
            stop();
            TINY_GSM_YIELD();
            rx.clear();
            sock_connected = at->modemConnect(host, port, mux);
            return sock_connected;
        }
 
        virtual int connect(IPAddress ip, uint16_t port)
        {
            String host;
            host.reserve(16);
            host += ip[0];
            host += ".";
            host += ip[1];
            host += ".";
            host += ip[2];
            host += ".";
            host += ip[3];
            return connect(host.c_str(), port);
        }
 
        virtual void stop()
        {
            TINY_GSM_YIELD();
            at->sendAT(GF("+CIPCLOSE="), mux);
            sock_connected = false;
            at->waitResponse();
            rx.clear();
        }
 
        virtual size_t write(const uint8_t *buf, size_t size)
        {
            TINY_GSM_YIELD();
            at->maintain();
            return at->modemSend(buf, size, mux);
        }
 
        virtual size_t write(uint8_t c)
        {
            return write(&c, 1);
        }
 
        virtual int available()
        {
            TINY_GSM_YIELD();
            if (!rx.size() && sock_connected) {
                // Workaround: sometimes SIM800 forgets to notify about data arrival.
                // TODO: Currently we ping the module periodically,
                // but maybe there's a better indicator that we need to poll
                if (millis() - prev_check > 500) {
                    got_data = true;
                    prev_check = millis();
                }
                at->maintain();
            }
            return rx.size() + sock_available;
        }
 
        virtual int read(uint8_t *buf, size_t size)
        {
            TINY_GSM_YIELD();
            at->maintain();
            size_t cnt = 0;
            while (cnt < size && sock_connected) {
                size_t chunk = TinyGsmMin(size-cnt, rx.size());
                if (chunk > 0) {
                    rx.get(buf, chunk);
                    buf += chunk;
                    cnt += chunk;
                    continue;
                }
                // TODO: Read directly into user buffer?
                at->maintain();
                if (sock_available > 0) {
                    at->modemRead(rx.free(), mux);
                } else {
                    break;
                }
            }
            return cnt;
        }
 
        virtual int read()
        {
            uint8_t c;
            if (read(&c, 1) == 1) {
                return c;
            }
            return -1;
        }
 
        virtual int peek()
        {
            return -1;    //TODO
        }
        virtual void flush()
        {
            at->stream.flush();
        }
 
        virtual uint8_t connected()
        {
            if (available()) {
                return true;
            }
            return sock_connected;
        }
        virtual operator bool()
        {
            return connected();
        }
 
        /*
         * Extended API
         */
 
        String remoteIP() TINY_GSM_ATTR_NOT_IMPLEMENTED;
 
    private:
        TinyGsmSim800* at;
        uint8_t       mux;
        uint16_t      sock_available;
        uint32_t      prev_check;
        bool          sock_connected;
        bool          got_data;
        RxFifo        rx;
    };
 
    class GsmClientSecure : public GsmClient
    {
    public:
        GsmClientSecure() {}
 
        GsmClientSecure(TinyGsmSim800& modem, uint8_t mux = 1)
            : GsmClient(modem, mux)
        {}
 
    public:
        virtual int connect(const char *host, uint16_t port)
        {
            stop();
            TINY_GSM_YIELD();
            rx.clear();
            sock_connected = at->modemConnect(host, port, mux, true);
            return sock_connected;
        }
    };
 
public:
 
    explicit TinyGsmSim800(Stream& stream)
        : stream(stream)
    {
        memset(sockets, 0, sizeof(sockets));
    }
 
    /*
     * Basic functions
     */
    bool begin()
    {
        return init();
    }
 
    bool init()
    {
        if (!testAT()) {
            return false;
        }
        sendAT(GF("&FZ"));  // Factory + Reset
        waitResponse();
        sendAT(GF("E0"));   // Echo Off
        if (waitResponse() != 1) {
            return false;
        }
        getSimStatus();
        return true;
    }
 
    void setBaud(unsigned long baud)
    {
        sendAT(GF("+IPR="), baud);
    }
 
    bool testAT(unsigned long timeout = 10000L)
    {
        //streamWrite(GF("AAAAA" GSM_NL));  // TODO: extra A's to help detect the baud rate
        for (unsigned long start = millis(); millis() - start < timeout; ) {
            sendAT(GF(""));
            if (waitResponse(200) == 1) {
                delay(100);
                return true;
            }
            delay(100);
        }
        return false;
    }
 
    void maintain()
    {
        for (int mux = 0; mux < TINY_GSM_MUX_COUNT; mux++) {
            GsmClient* sock = sockets[mux];
            if (sock && sock->got_data) {
                sock->got_data = false;
                sock->sock_available = modemGetAvailable(mux);
            }
        }
        while (stream.available()) {
            waitResponse(10, NULL, NULL);
        }
    }
 
    bool factoryDefault()
    {
        sendAT(GF("&FZE0&W"));  // Factory + Reset + Echo Off + Write
        waitResponse();
        sendAT(GF("+IPR=0"));   // Auto-baud
        waitResponse();
        sendAT(GF("+IFC=0,0")); // No Flow Control
        waitResponse();
        sendAT(GF("+ICF=3,3")); // 8 data 0 parity 1 stop
        waitResponse();
        sendAT(GF("+CSCLK=0")); // Disable Slow Clock
        waitResponse();
        sendAT(GF("&W"));       // Write configuration
        return waitResponse() == 1;
    }
 
    String getModemInfo()
    {
        sendAT(GF("I"));
        String res;
        if (waitResponse(1000L, res) != 1) {
            return "";
        }
        res.replace(GSM_NL "OK" GSM_NL, "");
        res.replace(GSM_NL, " ");
        res.trim();
        return res;
    }
 
    bool hasSSL()
    {
#if defined(TINY_GSM_MODEM_SIM900)
        return false;
#else
        sendAT(GF("+CIPSSL=?"));
        if (waitResponse(GF(GSM_NL "+CIPSSL:")) != 1) {
            return false;
        }
        return waitResponse() == 1;
#endif
    }
 
    /*
     * Power functions
     */
 
    bool restart()
    {
        if (!testAT()) {
            return false;
        }
        sendAT(GF("+CFUN=0"));
        if (waitResponse(10000L) != 1) {
            return false;
        }
        sendAT(GF("+CFUN=1,1"));
        if (waitResponse(10000L) != 1) {
            return false;
        }
        delay(3000);
        return init();
    }
 
    bool poweroff()
    {
        sendAT(GF("+CPOWD=1"));
        return waitResponse(GF("NORMAL POWER DOWN")) == 1;
    }
 
    bool radioOff()
    {
        sendAT(GF("+CFUN=0"));
        if (waitResponse(10000L) != 1) {
            return false;
        }
        delay(3000);
        return true;
    }
 
    /*
      During sleep, the SIM800 module has its serial communication disabled. In order to reestablish communication
      pull the DRT-pin of the SIM800 module LOW for at least 50ms. Then use this function to disable sleep mode.
      The DTR-pin can then be released again.
    */
    bool sleepEnable(bool enable = true)
    {
        sendAT(GF("+CSCLK="), enable);
        return waitResponse() == 1;
    }
 
    /*
     * SIM card functions
     */
 
    bool simUnlock(const char *pin)
    {
        sendAT(GF("+CPIN=\""), pin, GF("\""));
        return waitResponse() == 1;
    }
 
    String getSimCCID()
    {
        sendAT(GF("+ICCID"));
        if (waitResponse(GF(GSM_NL "+ICCID:")) != 1) {
            return "";
        }
        String res = stream.readStringUntil('\n');
        waitResponse();
        res.trim();
        return res;
    }
 
    String getIMEI()
    {
        sendAT(GF("+GSN"));
        if (waitResponse(GF(GSM_NL)) != 1) {
            return "";
        }
        String res = stream.readStringUntil('\n');
        waitResponse();
        res.trim();
        return res;
    }
 
    SimStatus getSimStatus(unsigned long timeout = 10000L)
    {
        for (unsigned long start = millis(); millis() - start < timeout; ) {
            sendAT(GF("+CPIN?"));
            if (waitResponse(GF(GSM_NL "+CPIN:")) != 1) {
                delay(1000);
                continue;
            }
            int status = waitResponse(GF("READY"), GF("SIM PIN"), GF("SIM PUK"), GF("NOT INSERTED"));
            waitResponse();
            switch (status) {
            case 2:
            case 3:
                return SIM_LOCKED;
            case 1:
                return SIM_READY;
            default:
                return SIM_ERROR;
            }
        }
        return SIM_ERROR;
    }
 
    RegStatus getRegistrationStatus()
    {
        sendAT(GF("+CREG?"));
        if (waitResponse(GF(GSM_NL "+CREG:")) != 1) {
            return REG_UNKNOWN;
        }
        streamSkipUntil(','); // Skip format (0)
        int status = stream.readStringUntil('\n').toInt();
        waitResponse();
        return (RegStatus)status;
    }
 
    String getOperator()
    {
        sendAT(GF("+COPS?"));
        if (waitResponse(GF(GSM_NL "+COPS:")) != 1) {
            return "";
        }
        streamSkipUntil('"'); // Skip mode and format
        String res = stream.readStringUntil('"');
        waitResponse();
        return res;
    }
 
    /*
     * Generic network functions
     */
 
    int getSignalQuality()
    {
        sendAT(GF("+CSQ"));
        if (waitResponse(GF(GSM_NL "+CSQ:")) != 1) {
            return 99;
        }
        int res = stream.readStringUntil(',').toInt();
        waitResponse();
        return res;
    }
 
    bool isNetworkConnected()
    {
        RegStatus s = getRegistrationStatus();
        return (s == REG_OK_HOME || s == REG_OK_ROAMING);
    }
 
    bool waitForNetwork(unsigned long timeout = 60000L)
    {
        for (unsigned long start = millis(); millis() - start < timeout; ) {
            if (isNetworkConnected()) {
                return true;
            }
            delay(250);
        }
        return false;
    }
 
    /*
     * GPRS functions
     */
    bool gprsConnect(const char* apn, const char* user = NULL, const char* pwd = NULL)
    {
        gprsDisconnect();
 
        // Set the Bearer for the IP
        sendAT(GF("+SAPBR=3,1,\"Contype\",\"GPRS\""));  // Set the connection type to GPRS
        waitResponse();
 
        sendAT(GF("+SAPBR=3,1,\"APN\",\""), apn, '"');  // Set the APN
        waitResponse();
 
        if (user && strlen(user) > 0) {
            sendAT(GF("+SAPBR=3,1,\"USER\",\""), user, '"');  // Set the user name
            waitResponse();
        }
        if (pwd && strlen(pwd) > 0) {
            sendAT(GF("+SAPBR=3,1,\"PWD\",\""), pwd, '"');  // Set the password
            waitResponse();
        }
 
        // Define the PDP context
        sendAT(GF("+CGDCONT=1,\"IP\",\""), apn, '"');
        waitResponse();
 
        // Activate the PDP context
        sendAT(GF("+CGACT=1,1"));
        waitResponse(60000L);
 
        // Open the definied GPRS bearer context
        sendAT(GF("+SAPBR=1,1"));
        waitResponse(85000L);
        // Query the GPRS bearer context status
        sendAT(GF("+SAPBR=2,1"));
        if (waitResponse(30000L) != 1) {
            return false;
        }
 
        // Attach to GPRS
        sendAT(GF("+CGATT=1"));
        if (waitResponse(60000L) != 1) {
            return false;
        }
 
        // TODO: wait AT+CGATT?
 
        // Set to multi-IP
        sendAT(GF("+CIPMUX=1"));
        if (waitResponse() != 1) {
            return false;
        }
 
        // Put in "quick send" mode (thus no extra "Send OK")
        sendAT(GF("+CIPQSEND=1"));
        if (waitResponse() != 1) {
            return false;
        }
 
        // Set to get data manually
        sendAT(GF("+CIPRXGET=1"));
        if (waitResponse() != 1) {
            return false;
        }
 
        // Start Task and Set APN, USER NAME, PASSWORD
        sendAT(GF("+CSTT=\""), apn, GF("\",\""), user, GF("\",\""), pwd, GF("\""));
        if (waitResponse(60000L) != 1) {
            return false;
        }
 
        // Bring Up Wireless Connection with GPRS or CSD
        sendAT(GF("+CIICR"));
        if (waitResponse(60000L) != 1) {
            return false;
        }
 
        // Get Local IP Address, only assigned after connection
        sendAT(GF("+CIFSR;E0"));
        if (waitResponse(10000L) != 1) {
            return false;
        }
 
        // Configure Domain Name Server (DNS)
        sendAT(GF("+CDNSCFG=\"8.8.8.8\",\"8.8.4.4\""));
        if (waitResponse() != 1) {
            return false;
        }
 
        return true;
    }
 
    bool gprsDisconnect()
    {
        // Shut the TCP/IP connection
        sendAT(GF("+CIPSHUT"));
        if (waitResponse(60000L) != 1) {
            return false;
        }
 
        sendAT(GF("+CGATT=0"));  // Deactivate the bearer context
        if (waitResponse(60000L) != 1) {
            return false;
        }
 
        return true;
    }
 
    bool isGprsConnected()
    {
        sendAT(GF("+CGATT?"));
        if (waitResponse(GF(GSM_NL "+CGATT:")) != 1) {
            return false;
        }
        int res = stream.readStringUntil('\n').toInt();
        waitResponse();
        if (res != 1) {
            return false;
        }
 
        sendAT(GF("+CIFSR;E0")); // Another option is to use AT+CGPADDR=1
        if (waitResponse() != 1) {
            return false;
        }
 
        return true;
    }
 
    String getLocalIP()
    {
        sendAT(GF("+CIFSR;E0"));
        String res;
        if (waitResponse(10000L, res) != 1) {
            return "";
        }
        res.replace(GSM_NL "OK" GSM_NL, "");
        res.replace(GSM_NL, "");
        res.trim();
        return res;
    }
 
    IPAddress localIP()
    {
        return TinyGsmIpFromString(getLocalIP());
    }
 
    /*
     * Phone Call functions
     */
 
    bool setGsmBusy(bool busy = true)
    {
        sendAT(GF("+GSMBUSY="), busy ? 1 : 0);
        return waitResponse() == 1;
    }
 
    bool callAnswer()
    {
        sendAT(GF("A"));
        return waitResponse() == 1;
    }
 
    // Returns true on pick-up, false on error/busy
    bool callNumber(const String& number)
    {
        if (number == GF("last")) {
            sendAT(GF("DL"));
        } else {
            sendAT(GF("D"), number, ";");
        }
        int status = waitResponse(60000L,
                                  GFP(GSM_OK),
                                  GF("BUSY" GSM_NL),
                                  GF("NO ANSWER" GSM_NL),
                                  GF("NO CARRIER" GSM_NL));
        switch (status) {
        case 1:
            return true;
        case 2:
        case 3:
            return false;
        default:
            return false;
        }
    }
 
    bool callHangup()
    {
        sendAT(GF("H"));
        return waitResponse() == 1;
    }
 
    // 0-9,*,#,A,B,C,D
    bool dtmfSend(char cmd, int duration_ms = 100)
    {
        duration_ms = constrain(duration_ms, 100, 1000);
 
        sendAT(GF("+VTD="), duration_ms / 100); // VTD accepts in 1/10 of a second
        waitResponse();
 
        sendAT(GF("+VTS="), cmd);
        return waitResponse(10000L) == 1;
    }
 
    /*
     * Messaging functions
     */
 
    String sendUSSD(const String& code)
    {
        sendAT(GF("+CMGF=1"));
        waitResponse();
        sendAT(GF("+CSCS=\"HEX\""));
        waitResponse();
        sendAT(GF("+CUSD=1,\""), code, GF("\""));
        if (waitResponse() != 1) {
            return "";
        }
        if (waitResponse(10000L, GF(GSM_NL "+CUSD:")) != 1) {
            return "";
        }
        stream.readStringUntil('"');
        String hex = stream.readStringUntil('"');
        stream.readStringUntil(',');
        int dcs = stream.readStringUntil('\n').toInt();
 
        if (dcs == 15) {
            return TinyGsmDecodeHex8bit(hex);
        } else if (dcs == 72) {
            return TinyGsmDecodeHex16bit(hex);
        } else {
            return hex;
        }
    }
 
    bool sendSMS(const String& number, const String& text)
    {
        sendAT(GF("+CMGF=1"));
        waitResponse();
        //Set GSM 7 bit default alphabet (3GPP TS 23.038)
        sendAT(GF("+CSCS=\"GSM\""));
        waitResponse();
        sendAT(GF("+CMGS=\""), number, GF("\""));
        if (waitResponse(GF(">")) != 1) {
            return false;
        }
        stream.print(text);
        stream.write((char)0x1A);
        stream.flush();
        return waitResponse(60000L) == 1;
    }
 
    bool sendSMS_UTF16(const String& number, const void* text, size_t len)
    {
        sendAT(GF("+CMGF=1"));
        waitResponse();
        sendAT(GF("+CSCS=\"HEX\""));
        waitResponse();
        sendAT(GF("+CSMP=17,167,0,8"));
        waitResponse();
 
        sendAT(GF("+CMGS=\""), number, GF("\""));
        if (waitResponse(GF(">")) != 1) {
            return false;
        }
 
        uint16_t* t = (uint16_t*)text;
        for (size_t i=0; i<len; i++) {
            uint8_t c = t[i] >> 8;
            if (c < 0x10) {
                stream.print('0');
            }
            stream.print(c, HEX);
            c = t[i] & 0xFF;
            if (c < 0x10) {
                stream.print('0');
            }
            stream.print(c, HEX);
        }
        stream.write((char)0x1A);
        stream.flush();
        return waitResponse(60000L) == 1;
    }
 
 
    /*
     * Location functions
     */
 
    String getGsmLocation()
    {
        sendAT(GF("+CIPGSMLOC=1,1"));
        if (waitResponse(10000L, GF(GSM_NL "+CIPGSMLOC:")) != 1) {
            return "";
        }
        String res = stream.readStringUntil('\n');
        waitResponse();
        res.trim();
        return res;
    }
 
    /*
     * Battery functions
     */
    // Use: float vBatt = modem.getBattVoltage() / 1000.0;
    uint16_t getBattVoltage()
    {
        sendAT(GF("+CBC"));
        if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
            return 0;
        }
        streamSkipUntil(','); // Skip
        streamSkipUntil(','); // Skip
 
        uint16_t res = stream.readStringUntil(',').toInt();
        waitResponse();
        return res;
    }
 
    int getBattPercent()
    {
        sendAT(GF("+CBC"));
        if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
            return false;
        }
        stream.readStringUntil(',');
        int res = stream.readStringUntil(',').toInt();
        waitResponse();
        return res;
    }
 
protected:
 
    bool modemConnect(const char* host, uint16_t port, uint8_t mux, bool ssl = false)
    {
#if !defined(TINY_GSM_MODEM_SIM900)
        sendAT(GF("+CIPSSL="), ssl);
        int rsp = waitResponse();
        if (ssl && rsp != 1) {
            return false;
        }
#endif
        sendAT(GF("+CIPSTART="), mux, ',', GF("\"TCP"), GF("\",\""), host, GF("\","), port);
        rsp = waitResponse(75000L,
                           GF("CONNECT OK" GSM_NL),
                           GF("CONNECT FAIL" GSM_NL),
                           GF("ALREADY CONNECT" GSM_NL),
                           GF("ERROR" GSM_NL),
                           GF("CLOSE OK" GSM_NL)   // Happens when HTTPS handshake fails
                          );
        return (1 == rsp);
    }
 
    int modemSend(const void* buff, size_t len, uint8_t mux)
    {
        sendAT(GF("+CIPSEND="), mux, ',', len);
        if (waitResponse(GF(">")) != 1) {
            return 0;
        }
        stream.write((uint8_t*)buff, len);
        stream.flush();
        if (waitResponse(GF(GSM_NL "DATA ACCEPT:")) != 1) {
            return 0;
        }
        streamSkipUntil(','); // Skip mux
        return stream.readStringUntil('\n').toInt();
    }
 
    size_t modemRead(size_t size, uint8_t mux)
    {
#ifdef TINY_GSM_USE_HEX
        sendAT(GF("+CIPRXGET=3,"), mux, ',', size);
        if (waitResponse(GF("+CIPRXGET:")) != 1) {
            return 0;
        }
#else
        sendAT(GF("+CIPRXGET=2,"), mux, ',', size);
        if (waitResponse(GF("+CIPRXGET:")) != 1) {
            return 0;
        }
#endif
        streamSkipUntil(','); // Skip mode 2/3
        streamSkipUntil(','); // Skip mux
        size_t len = stream.readStringUntil(',').toInt();
        sockets[mux]->sock_available = stream.readStringUntil('\n').toInt();
 
        for (size_t i=0; i<len; i++) {
#ifdef TINY_GSM_USE_HEX
            while (stream.available() < 2) {
                TINY_GSM_YIELD();
            }
            char buf[4] = { 0, };
            buf[0] = stream.read();
            buf[1] = stream.read();
            char c = strtol(buf, NULL, 16);
#else
            while (!stream.available()) {
                TINY_GSM_YIELD();
            }
            char c = stream.read();
#endif
            sockets[mux]->rx.put(c);
        }
        waitResponse();
        return len;
    }
 
    size_t modemGetAvailable(uint8_t mux)
    {
        sendAT(GF("+CIPRXGET=4,"), mux);
        size_t result = 0;
        if (waitResponse(GF("+CIPRXGET:")) == 1) {
            streamSkipUntil(','); // Skip mode 4
            streamSkipUntil(','); // Skip mux
            result = stream.readStringUntil('\n').toInt();
            waitResponse();
        }
        if (!result) {
            sockets[mux]->sock_connected = modemGetConnected(mux);
        }
        return result;
    }
 
    bool modemGetConnected(uint8_t mux)
    {
        sendAT(GF("+CIPSTATUS="), mux);
        int res = waitResponse(GF(",\"CONNECTED\""), GF(",\"CLOSED\""), GF(",\"CLOSING\""),
                               GF(",\"INITIAL\""));
        waitResponse();
        return 1 == res;
    }
 
public:
 
    /* Utilities */
 
    template<typename T>
    void streamWrite(T last)
    {
        stream.print(last);
    }
 
    template<typename T, typename... Args>
    void streamWrite(T head, Args... tail)
    {
        stream.print(head);
        streamWrite(tail...);
    }
 
    bool streamSkipUntil(char c)   //TODO: timeout
    {
        while (true) {
            while (!stream.available()) {
                TINY_GSM_YIELD();
            }
            if (stream.read() == c) {
                return true;
            }
        }
        return false;
    }
 
    template<typename... Args>
    void sendAT(Args... cmd)
    {
        streamWrite("AT", cmd..., GSM_NL);
        stream.flush();
        TINY_GSM_YIELD();
        //DBG("### AT:", cmd...);
    }
 
    // TODO: Optimize this!
    uint8_t waitResponse(uint32_t timeout, String& data,
                         GsmConstStr r1=GFP(GSM_OK), GsmConstStr r2=GFP(GSM_ERROR),
                         GsmConstStr r3=NULL, GsmConstStr r4=NULL, GsmConstStr r5=NULL)
    {
        /*String r1s(r1); r1s.trim();
        String r2s(r2); r2s.trim();
        String r3s(r3); r3s.trim();
        String r4s(r4); r4s.trim();
        String r5s(r5); r5s.trim();
        DBG("### ..:", r1s, ",", r2s, ",", r3s, ",", r4s, ",", r5s);*/
        data.reserve(64);
        int index = 0;
        unsigned long startMillis = millis();
        do {
            TINY_GSM_YIELD();
            while (stream.available() > 0) {
                int a = stream.read();
                if (a <= 0) {
                    continue;    // Skip 0x00 bytes, just in case
                }
                data += (char)a;
                if (r1 && data.endsWith(r1)) {
                    index = 1;
                    goto finish;
                } else if (r2 && data.endsWith(r2)) {
                    index = 2;
                    goto finish;
                } else if (r3 && data.endsWith(r3)) {
                    index = 3;
                    goto finish;
                } else if (r4 && data.endsWith(r4)) {
                    index = 4;
                    goto finish;
                } else if (r5 && data.endsWith(r5)) {
                    index = 5;
                    goto finish;
                } else if (data.endsWith(GF(GSM_NL "+CIPRXGET:"))) {
                    String mode = stream.readStringUntil(',');
                    if (mode.toInt() == 1) {
                        int mux = stream.readStringUntil('\n').toInt();
                        if (mux >= 0 && mux < TINY_GSM_MUX_COUNT && sockets[mux]) {
                            sockets[mux]->got_data = true;
                        }
                        data = "";
                    } else {
                        data += mode;
                    }
                } else if (data.endsWith(GF("CLOSED" GSM_NL))) {
                    int nl = data.lastIndexOf(GSM_NL, data.length()-8);
                    int coma = data.indexOf(',', nl+2);
                    int mux = data.substring(nl+2, coma).toInt();
                    if (mux >= 0 && mux < TINY_GSM_MUX_COUNT && sockets[mux]) {
                        sockets[mux]->sock_connected = false;
                    }
                    data = "";
                    DBG("### Closed: ", mux);
                }
            }
        } while (millis() - startMillis < timeout);
finish:
        if (!index) {
            data.trim();
            if (data.length()) {
                DBG("### Unhandled:", data);
            }
            data = "";
        }
        return index;
    }
 
    uint8_t waitResponse(uint32_t timeout,
                         GsmConstStr r1=GFP(GSM_OK), GsmConstStr r2=GFP(GSM_ERROR),
                         GsmConstStr r3=NULL, GsmConstStr r4=NULL, GsmConstStr r5=NULL)
    {
        String data;
        return waitResponse(timeout, data, r1, r2, r3, r4, r5);
    }
 
    uint8_t waitResponse(GsmConstStr r1=GFP(GSM_OK), GsmConstStr r2=GFP(GSM_ERROR),
                         GsmConstStr r3=NULL, GsmConstStr r4=NULL, GsmConstStr r5=NULL)
    {
        return waitResponse(1000, r1, r2, r3, r4, r5);
    }
 
public:
    Stream&       stream;
 
protected:
    GsmClient*    sockets[TINY_GSM_MUX_COUNT];
};
 
#endif