Add U-blox SARA-U201 support, Arduino MKR GSM 1400 support.

.travis.yml

@@ -22,6 +22,7 @@ env:
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_A6'      --project-option='framework=arduino' --board=uno --board=leonardo --board=yun --board=megaatmega2560 --board=genuino101 --board=mkr1000USB --board=zero --board=teensy31 --board=bluepill_f103c8 --board=uno_pic32 --board=esp01 --board=nodemcuv2 --board=esp32dev --board=mayfly"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_M590'    --project-option='framework=arduino' --board=uno --board=leonardo --board=yun --board=megaatmega2560 --board=genuino101 --board=mkr1000USB --board=zero --board=teensy31 --board=bluepill_f103c8 --board=uno_pic32 --board=esp01 --board=nodemcuv2 --board=esp32dev --board=mayfly"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_ESP8266' --project-option='framework=arduino' --board=uno --board=leonardo --board=yun --board=megaatmega2560 --board=genuino101 --board=mkr1000USB --board=zero --board=teensy31 --board=bluepill_f103c8 --board=uno_pic32 --board=esp01 --board=nodemcuv2 --board=esp32dev --board=mayfly"
+    - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_U201'    --project-option='framework=arduino' --board=uno --board=leonardo --board=yun --board=megaatmega2560 --board=genuino101 --board=mkr1000USB --board=zero --board=teensy31 --board=bluepill_f103c8 --board=uno_pic32 --board=esp01 --board=nodemcuv2 --board=esp32dev --board=mayfly"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_XBEE'    --project-option='framework=arduino' --board=uno --board=leonardo --board=yun --board=megaatmega2560 --board=genuino101 --board=mkr1000USB --board=zero --board=teensy31 --board=bluepill_f103c8 --board=uno_pic32 --board=esp01 --board=nodemcuv2 --board=esp32dev --board=mayfly"
 
     # Energia test
@@ -29,6 +30,7 @@ env:
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_A6'      --project-option='framework=energia' --board=lplm4f120h5qr"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_M590'    --project-option='framework=energia' --board=lplm4f120h5qr"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_ESP8266' --project-option='framework=energia' --board=lplm4f120h5qr"
+    - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_U201'    --project-option='framework=energia' --board=lplm4f120h5qr"
     - PLATFORMIO_CI_SRC=tools/test_build PLATFORMIO_CI_ARGS="--project-option='build_flags=-D TINY_GSM_MODEM_XBEE'    --project-option='framework=energia' --board=lplm4f120h5qr"
 
 install:

TinyGsmClient.h

@@ -29,6 +29,11 @@
   #include <TinyGsmClientM590.h>
   typedef TinyGsm::GsmClient TinyGsmClient;
 
+#elif defined(TINY_GSM_MODEM_U201)
+  #include <TinyGsmClientU201.h>
+  typedef TinyGsmU201 TinyGsm;
+  typedef TinyGsmU201::GsmClient TinyGsmClient;
+
 #elif defined(TINY_GSM_MODEM_ESP8266)
   #include <TinyGsmClientESP8266.h>
   typedef TinyGsm::GsmClient TinyGsmClient;

TinyGsmClientU201.h

@@ -0,0 +1,719 @@
+/**
+ * @file       TinyGsmClientU201.h
+ * @author     Volodymyr Shymanskyy
+ * @license    LGPL-3.0
+ * @copyright  Copyright (c) 2016 Volodymyr Shymanskyy
+ * @date       Nov 2016
+ */
+
+#ifndef TinyGsmClientU201_h
+#define TinyGsmClientU201_h
+
+//#define TINY_GSM_DEBUG Serial
+
+#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 TinyGsmU201
+{
+
+public:
+
+class GsmClient : public Client
+{
+  friend class TinyGsmU201;
+  typedef TinyGsmFifo<uint8_t, TINY_GSM_RX_BUFFER> RxFifo;
+
+public:
+  GsmClient() {}
+
+  GsmClient(TinyGsmU201& modem, uint8_t mux = 1) {
+    init(&modem, mux);
+  }
+
+  bool init(TinyGsmU201* modem, uint8_t mux = 1) {
+    this->at = modem;
+    this->mux = mux;
+    sock_available = 0;
+    sock_connected = false;
+    got_data = false;
+
+    return true;
+  }
+
+public:
+  virtual int connect(const char *host, uint16_t port) {
+    TINY_GSM_YIELD();
+    rx.clear();
+    sock_connected = at->modemConnect(host, port, &mux);
+    at->sockets[mux] = this;
+    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("+USOCL="), mux);
+    sock_connected = false;
+    at->waitResponse();
+  }
+
+  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) { // TODO
+      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) {
+      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:
+  TinyGsmU201*  at;
+  uint8_t       mux;
+  uint16_t      sock_available;
+  bool          sock_connected;
+  bool          got_data;
+  RxFifo        rx;
+};
+
+class GsmClientSecure : public GsmClient
+{
+public:
+  GsmClientSecure() {}
+
+  GsmClientSecure(TinyGsmU201& modem, uint8_t mux = 1)
+    : GsmClient(modem, mux)
+  {}
+
+public:
+  virtual int connect(const char *host, uint16_t port) {
+    TINY_GSM_YIELD();
+    rx.clear();
+    sock_connected = at->modemConnect(host, port, &mux, true);
+    at->sockets[mux] = this;
+    return sock_connected;
+  }
+};
+
+public:
+
+#ifdef GSM_DEFAULT_STREAM
+  TinyGsmU201(Stream& stream = GSM_DEFAULT_STREAM)
+#else
+  TinyGsmU201(Stream& stream)
+#endif
+    : stream(stream)
+  {
+    memset(sockets, 0, sizeof(sockets));
+  }
+
+  /*
+   * Basic functions
+   */
+  bool begin(const char* pin = NULL) {
+    return init(pin);
+  }
+
+  bool init(const char* pin = NULL) {
+    if (!autoBaud()) {
+      return false;
+    }
+    sendAT(GF("E0"));   // Echo Off
+    if (waitResponse() != 1) {
+      return false;
+    }
+    int ret = getSimStatus();
+    if (ret != SIM_READY && pin != NULL && strlen(pin) > 0) {
+      simUnlock(pin);
+    }
+    return (getSimStatus() == SIM_READY);
+  }
+
+  void setBaud(unsigned long baud) {
+    sendAT(GF("+IPR="), baud);
+  }
+
+  bool autoBaud(unsigned long timeout = 10000L) {
+    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("+UFACTORY=0,1"));  // Factory + Reset + Echo Off
+    waitResponse();
+    sendAT(GF("+CFUN=16"));   // Auto-baud
+    return waitResponse() == 1;
+  }
+
+  /*
+   * Power functions
+   */
+
+  bool restart() {
+    if (!autoBaud()) {
+      return false;
+    }
+    sendAT(GF("+CFUN=16"));
+    if (waitResponse(10000L) != 1) {
+      return false;
+    }
+    delay(3000);
+    return init();
+  }
+
+  bool poweroff() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  /*
+   * SIM card functions
+   */
+
+  bool simUnlock(const char *pin) {
+    sendAT(GF("+CPIN=\""), pin, GF("\""));
+    return waitResponse() == 1;
+  }
+
+  String getSimCCID() {
+    sendAT(GF("+CCID"));
+    if (waitResponse(GF(GSM_NL "+CCID:")) != 1) {
+      return "";
+    }
+    String res = stream.readStringUntil('\n');
+    waitResponse();
+    res.trim();
+    return res;
+  }
+
+  String getIMEI() {
+    sendAT(GF("+CGSN"));
+    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("+CGREG?"));
+    if (waitResponse(GF(GSM_NL "+CGREG:")) != 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(500);
+    }
+    return false;
+  }
+
+  /*
+   * GPRS functions
+   */
+  bool gprsConnect(const char* apn, const char* user, const char* pwd) {
+    gprsDisconnect();
+
+    sendAT(GF("+CGATT=1"));
+    waitResponse(5000L);
+
+    sendAT(GF("+UPSD=0,1,\""), apn, '"');
+    waitResponse();
+
+    if (user && strlen(user) > 0) {
+      sendAT(GF("+UPSD=0,2,\""), user, '"');
+      waitResponse();
+    }
+    if (pwd && strlen(pwd) > 0) {
+      sendAT(GF("+UPSD=0,3,\""), pwd, '"');
+      waitResponse();
+    }
+
+    sendAT(GF("+UPSD=0,7,\"0.0.0.0\"")); // Dynamic IP
+    waitResponse();
+
+    sendAT(GF("+UPSDA=0,3"));
+    waitResponse(6000L);
+
+    // Open a GPRS context
+    sendAT(GF("+UPSND=0,8"));
+    if (waitResponse(GF(",8,1")) != 1) {
+      return false;
+    }
+    return true;
+  }
+
+  bool gprsDisconnect() {
+    sendAT(GF("+UPSDA=0,4"));
+    if (waitResponse(60000L) != 1)
+      return false;
+
+    sendAT(GF("+CGATT=0"));
+    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.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) TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  //bool callRedial() {
+  //  sendAT(GF("DL"));
+  //  return waitResponse() == 1;
+  //}
+
+  bool callHangup() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  /*
+   * Messaging functions
+   */
+
+  String sendUSSD(const String& code) TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  bool sendSMS(const String& number, const String& text) TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  bool sendSMS_UTF16(const String& number, const void* text, size_t len) TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+
+  /*
+   * Location functions
+   */
+
+  String getGsmLocation() {
+    sendAT(GF("+ULOC=2,3,0,120,1"));
+    if (waitResponse(GF(GSM_NL "+UULOC:")) != 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("+CIND"));
+    if (waitResponse(GF(GSM_NL "+CIND:")) != 1) {
+      return 0;
+    }
+
+    uint16_t res = stream.readStringUntil(',').toInt();
+    waitResponse();
+    return res;
+  }
+
+  int getBattPercent() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+protected:
+
+  bool modemConnect(const char* host, uint16_t port, uint8_t* mux, bool ssl = false) {
+    sendAT(GF("+USOCR=6"));
+    if (waitResponse(GF(GSM_NL "+USOCR:")) != 1) {
+      return false;
+    }
+    *mux = stream.readStringUntil('\n').toInt();
+    waitResponse();
+
+    if (ssl) {
+      sendAT(GF("+USOSEC="), *mux, ",1");
+      waitResponse();
+    }
+
+    sendAT(GF("+USOCO="), *mux, ",\"", host, "\",", port);
+    int rsp = waitResponse(75000L);
+    return (1 == rsp);
+  }
+
+  int modemSend(const void* buff, size_t len, uint8_t mux) {
+    sendAT(GF("+USOWR="), mux, ',', len);
+    if (waitResponse(GF("@")) != 1) {
+      return -1;
+    }
+    // 50ms delay, see AT manual section 25.10.4
+    delay(50);
+    stream.write((uint8_t*)buff, len);
+    stream.flush();
+    if (waitResponse(GF(GSM_NL "+USOWR:")) != 1) {
+      return -1;
+    }
+    streamSkipUntil(','); // Skip mux
+    return stream.readStringUntil('\n').toInt();
+  }
+
+  size_t modemRead(size_t size, uint8_t mux) {
+    sendAT(GF("+USORD="), mux, ',', size);
+    if (waitResponse(GF(GSM_NL "+USORD:")) != 1) {
+      return 0;
+    }
+    streamSkipUntil(','); // Skip mux
+    size_t len = stream.readStringUntil(',').toInt();
+    streamSkipUntil('\"');
+
+    for (size_t i=0; i<len; i++) {
+      while (!stream.available()) { TINY_GSM_YIELD(); }
+      char c = stream.read();
+      sockets[mux]->rx.put(c);
+    }
+    streamSkipUntil('\"');
+    waitResponse();
+    return len;
+  }
+
+  size_t modemGetAvailable(uint8_t mux) {
+    sendAT(GF("+USORD="), mux, ',', 0);
+    size_t result = 0;
+    if (waitResponse(GF(GSM_NL "+USORD:")) == 1) {
+      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("+USOCTL="), mux, ",10");
+    if (waitResponse(GF(GSM_NL "+USOCTL:")) != 1)
+      return false;
+
+    streamSkipUntil(','); // Skip mux
+    streamSkipUntil(','); // Skip type
+    int result = stream.readStringUntil('\n').toInt();
+
+    return result != 0;
+  }
+
+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;
+        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 "+UUSORD:"))) {
+          int mux = stream.readStringUntil(',').toInt();
+          if (mux >= 0 && mux < TINY_GSM_MUX_COUNT && sockets[mux]) {
+            sockets[mux]->got_data = true;
+          }
+          data = "";
+        } else if (data.endsWith(GF(GSM_NL "+UUSOCL:"))) {
+          int mux = stream.readStringUntil('\n').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);
+  }
+
+protected:
+  Stream&       stream;
+  GsmClient*    sockets[TINY_GSM_MUX_COUNT];
+};
+
+#endif