Merge branch 'V1pr-master'

examples/AllFunctions/AllFunctions.ino

@@ -16,6 +16,8 @@
 // #define TINY_GSM_MODEM_A6
 // #define TINY_GSM_MODEM_A7
 // #define TINY_GSM_MODEM_M590
+// #define TINY_GSM_MODEM_MC60
+// #define TINY_GSM_MODEM_MC60E
 
 // Set serial for debug console (to the Serial Monitor, speed 115200)
 #define SerialMon Serial
@@ -32,6 +34,22 @@
 //#define DUMP_AT_COMMANDS
 #define TINY_GSM_DEBUG SerialMon
 
+#define GSM_AUTOBAUD_MIN 9600
+#define GSM_AUTOBAUD_MAX 38400
+
+/*
+ * Test enabled
+ */
+#define TINY_GSM_USE_GPRS true
+#define TINY_GSM_USE_CALL true
+#define TINY_GSM_USE_SMS true
+#define TINY_GSM_USE_USSD true
+// powerdown modem after tests
+#define TINY_GSM_POWERDOWN false
+
+// set GSM PIN, if any
+#define GSM_PIN ""
+
 // Set phone numbers, if you want to test SMS and Calls
 //#define SMS_TARGET  "+380xxxxxxxxx"
 //#define CALL_TARGET "+380xxxxxxxxx"
@@ -62,7 +80,7 @@ void setup() {
   delay(3000);
 
   // Set GSM module baud rate
-  TinyGsmAutoBaud(SerialAT);
+  TinyGsmAutoBaud(SerialAT,GSM_AUTOBAUD_MIN,GSM_AUTOBAUD_MAX);
 }
 
 void loop() {
@@ -71,6 +89,10 @@ void loop() {
   // To skip it, call init() instead of restart()
   DBG("Initializing modem...");
   if (!modem.restart()) {
+    DBG("Failed to restart modem, delayin 10s and retring");
+    delay(3000);
+    // restart autobaud in case GSM just rebooted
+    TinyGsmAutoBaud(SerialAT,GSM_AUTOBAUD_MIN,GSM_AUTOBAUD_MAX);
     delay(10000);
     return;
   }
@@ -78,8 +100,10 @@ void loop() {
   String modemInfo = modem.getModemInfo();
   DBG("Modem:", modemInfo);
 
-  // Unlock your SIM card with a PIN
-  //modem.simUnlock("1234");
+  // Unlock your SIM card with a PIN if needed
+  if ( GSM_PIN && modem.getSimStatus() != 3 ) { 
+    modem.simUnlock(GSM_PIN);
+  }
 
   DBG("Waiting for network...");
   if (!modem.waitForNetwork()) {
@@ -91,11 +115,13 @@ void loop() {
     DBG("Network connected");
   }
 
+#if TINY_GSM_USE_GPRS
   DBG("Connecting to", apn);
   if (!modem.gprsConnect(apn, user, pass)) {
     delay(10000);
     return;
   }
+#endif
 
   bool res;
 
@@ -110,6 +136,7 @@ void loop() {
 
   IPAddress local = modem.localIP();
   DBG("Local IP:", local);
+#endif
 
   int csq = modem.getSignalQuality();
   DBG("Signal quality:", csq);
@@ -137,15 +164,16 @@ void loop() {
 
   String ussd_phone_num = modem.sendUSSD("*161#");
   DBG("Phone number (USSD):", ussd_phone_num);
+#endif
 
-#if defined(TINY_GSM_MODEM_SIM808)
+#if defined(TINY_GSM_MODEM_HAS_GPS)
   modem.enableGPS();
   String gps_raw = modem.getGPSraw();
   modem.disableGPS();
   DBG("GPS raw data:", gps_raw);
 #endif
 
-#if defined(SMS_TARGET)
+#if TINY_GSM_USE_SMS && defined(SMS_TARGET)
   res = modem.sendSMS(SMS_TARGET, String("Hello from ") + imei);
   DBG("SMS:", res ? "OK" : "fail");
 
@@ -154,7 +182,7 @@ void loop() {
   DBG("UTF16 SMS:", res ? "OK" : "fail");
 #endif
 
-#if defined(CALL_TARGET)
+#if TINY_GSM_USE_CALL && defined(CALL_TARGET)
   DBG("Calling:", CALL_TARGET);
 
   // This is NOT supported on M590
@@ -179,17 +207,21 @@ void loop() {
   }
 #endif
 
+#if TINY_GSM_USE_GPRS
   modem.gprsDisconnect();
   if (!modem.isGprsConnected()) {
     DBG("GPRS disconnected");
   } else {
     DBG("GPRS disconnect: Failed.");
   }
+#endif
 
+#if TINY_GSM_POWERDOWN 
   // Try to power-off (modem may decide to restart automatically)
   // To turn off modem completely, please use Reset/Enable pins
   modem.poweroff();
   DBG("Poweroff.");
+#endif
 
   // Do nothing forevermore
   while (true) {

src/TinyGsmClient.h

@@ -13,7 +13,7 @@
   #define TINY_GSM_MODEM_HAS_SSL
 #endif
 
-#if defined(TINY_GSM_MODEM_SIM808) || defined(TINY_GSM_MODEM_SIM868) || defined(TINY_GSM_MODEM_A7)
+#if defined(TINY_GSM_MODEM_SIM808) || defined(TINY_GSM_MODEM_SIM868) || defined(TINY_GSM_MODEM_A7) || defined(TINY_GSM_MODEM_MC60) || defined(TINY_GSM_MODEM_MC60E)
   #define TINY_GSM_MODEM_HAS_GPS
 #endif
 
@@ -56,6 +56,12 @@
   typedef TinyGsmM590 TinyGsm;
   typedef TinyGsmM590::GsmClient TinyGsmClient;
 
+#elif defined(TINY_GSM_MODEM_MC60) || defined(TINY_GSM_MODEM_MC60E)
+  #include <TinyGsmClientMC60.h>
+  typedef TinyGsmMC60 TinyGsm;
+  typedef TinyGsmMC60::GsmClient TinyGsmClient;
+  typedef TinyGsmMC60::GsmClientSecure TinyGsmClientSecure;
+
 #elif defined(TINY_GSM_MODEM_G350)
   #define TINY_GSM_MODEM_HAS_GPRS
   #include <TinyGsmClientG350.h>

src/TinyGsmClientMC60.h

@@ -0,0 +1,961 @@
+/**
+ * @file       TinyGsmClientMC60.h
+ * @author     Volodymyr Shymanskyy
+ * @license    LGPL-3.0
+ * @copyright  Copyright (c) 2016 Volodymyr Shymanskyy
+ * @date       Nov 2016
+ *
+ * @MC60 support added by Tamas Dajka 2017.10.15
+ *
+ */
+
+#ifndef TinyGsmClientMC60_h
+#define TinyGsmClientMC60_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 = "CME ERROR" GSM_NL;
+
+enum SimStatus {
+  SIM_ERROR = 0,
+  SIM_READY = 1,
+  SIM_LOCKED = 2,
+  SIM_ANTITHEFT_LOCKED = 3,
+};
+
+enum RegStatus {
+  REG_UNREGISTERED = 0,
+  REG_SEARCHING    = 2,
+  REG_DENIED       = 3,
+  REG_OK_HOME      = 1,
+  REG_OK_ROAMING   = 5,
+  REG_UNKNOWN      = 4,
+};
+
+//============================================================================//
+//============================================================================//
+//                    Declaration of the TinyGsmMC60 Class
+//============================================================================//
+//============================================================================//
+
+
+
+class TinyGsmMC60
+{
+
+//============================================================================//
+//============================================================================//
+//                          The MC60 Client Class
+//============================================================================//
+//============================================================================//
+
+
+public:
+
+class GsmClient : public Client
+{
+  friend class TinyGsmMC60;
+  typedef TinyGsmFifo<uint8_t, TINY_GSM_RX_BUFFER> RxFifo;
+
+public:
+  GsmClient() {}
+
+  GsmClient(TinyGsmMC60& modem, uint8_t mux = 1) {
+    init(&modem, mux);
+  }
+
+  bool init(TinyGsmMC60* 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("+QICLOSE="), 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) {
+      // Workaround: sometimes MC60 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) {
+      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:
+  TinyGsmMC60*    at;
+  uint8_t         mux;
+  uint16_t        sock_available;
+  uint32_t        prev_check;
+  bool            sock_connected;
+  bool            got_data;
+  RxFifo          rx;
+};
+
+//============================================================================//
+//============================================================================//
+//                          The MC60 Secure Client
+//============================================================================//
+//============================================================================//
+
+
+class GsmClientSecure : public GsmClient
+{
+public:
+  GsmClientSecure() {}
+
+  GsmClientSecure(TinyGsmMC60& 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;
+  }
+};
+
+//============================================================================//
+//============================================================================//
+//                          The MC60 Modem Functions
+//============================================================================//
+//============================================================================//
+
+public:
+
+#ifdef GSM_DEFAULT_STREAM
+  TinyGsmMC60(Stream& stream = GSM_DEFAULT_STREAM)
+#else
+  TinyGsmMC60(Stream& stream)
+#endif
+    : 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;
+  }
+
+  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("+QSCLK=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;
+  }
+
+  /*
+  * under development
+  *
+  bool hasSSL() {
+    sendAT(GF("+QIPSSL=?"));
+    if (waitResponse(GF(GSM_NL "+CIPSSL:")) != 1) {
+      return false;
+    }
+    return waitResponse() == 1;
+  }
+*/
+  /*
+   * 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("+QPOWD=1"));
+    return waitResponse(GF("NORMAL POWER DOWN")) == 1;
+  }
+
+  bool radioOff() {
+    if (!testAT()) {
+      return false;
+    }
+    sendAT(GF("+CFUN=0"));
+    if (waitResponse(10000L) != 1) {
+      return false;
+    }
+    delay(3000);
+    return true;
+  }
+
+  /*
+   * 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"), GF("PH_SIM PIN"), GF("PH_SIM PUK"));
+      waitResponse();
+      switch (status) {
+        case 2:
+        case 3:  return SIM_LOCKED;
+        case 5:
+        case 6:  return SIM_ANTITHEFT_LOCKED;
+        case 1:  return SIM_READY;
+        default: return SIM_ERROR;
+      }
+    }
+    return SIM_ERROR;
+  }
+
+  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
+   */
+
+  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;
+  }
+
+  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;
+  }
+
+  String getLocalIP() {
+    sendAT(GF("+CIFSR;E0"));
+    String res;
+    if (waitResponse(10000L, res) != 1) {
+      return "";
+    }
+    res.trim();
+    return res;
+  }
+
+  IPAddress localIP() {
+    return TinyGsmIpFromString(getLocalIP());
+  }
+
+  /*
+   * WiFi functions
+   */
+
+  /*
+   * GPRS functions
+   */
+  bool gprsConnect(const char* apn, const char* user, const char* pwd) {
+    gprsDisconnect();
+
+    /*
+    *
+    * QICSGP (IP INITIAL) -> QIREGAPP (IP START) -> QIACT (IP CONFIG) ->
+    *
+    */
+
+    // 1: Attach to GPRS service "AT+CGATT=1"
+    // 2: Wait attach OK and Set the context 0 as FGCNT "AT+QIFGCNT=0"
+    // 3: Wait context OK and Set bearer type as GPRS, APN, user name and pasword "AT+QICSGP=1..."
+    // 4: Wait bearer OK and Enable the function of MUXIP "AT+QIMUX=1"
+    // 5: Wait for disable MUXIP OK and Set the session mode as non transparent "AT+QIMODE=0"
+    // 6: Wait for session mode OK and Enable notification when data received "AT+QINDI=1"
+    // 8: Wait domain name OK and Register the TCP/IP stack "AT+QIREGAPP"
+    // 9: Wait for Register OK and Activate FGCNT "AT+QIACT"
+    // 10: Wait for activate OK
+
+
+    // check for GPRS availability
+
+
+    // select foreground context  - QIFGCNT
+
+
+    stream.write("AT+QICSGP=1");
+    streamWrite(",\"", apn, "\"");
+
+    if (user) {
+      streamWrite(",\"", user, "\"");
+    }
+
+    if (pwd) {
+      streamWrite(",\"", pwd, "\"");
+    }
+    streamWrite(GSM_NL);
+    stream.flush();
+    waitResponse(300L);
+
+    sendAT(GF("+CGDCONT=1,\"IP\",\""), apn, '"');
+    waitResponse();
+
+    sendAT(GF("+CGACT=1,1"));
+    waitResponse(60000L);
+
+    // Open a GPRS context
+    sendAT("+QIREGAPP=\"", apn, "\",\"", user, "\",\"", pwd,  "\"" );
+    waitResponse(300L);
+
+    sendAT(GF("+QIACT=1,1"));
+    waitResponse(60000L);
+
+    /*
+    sendAT(GF("+QISTAT"));
+    waitResponse(300L);
+    waitResponce()
+    */
+
+/*
+    sendAT(GF("+SAPBR=1,1"));
+    waitResponse(85000L);
+    // Query the GPRS context
+    sendAT(GF("+SAPBR=2,1"));
+    if (waitResponse(30000L) != 1)
+      return false;
+*/
+
+    // attach context
+    sendAT(GF("+CGATT=1"));
+    if (waitResponse(60000L) != 1)
+      return false;
+
+    // TODO: wait AT+CGATT?
+
+
+    String curr_ip;
+    sendAT(GF("+QILOCIP"));
+
+    if (waitResponse(1000L, curr_ip) != 1) {
+      return false;
+    }
+    curr_ip.replace(GSM_NL "OK" GSM_NL, "");
+    curr_ip.replace(GSM_NL, " ");
+    curr_ip.trim();
+
+
+    sendAT(GF("+QIMUX=1"));
+    if (waitResponse() != 1) {
+      return false;
+    }
+
+
+    // Data transmit mode select
+    sendAT(GF("+CIPQSEND=1"));
+    if (waitResponse() != 1) {
+      return false;
+    }
+
+    // get data manually from network - ? NOT transparent mode?
+    sendAT(GF("+CIPRXGET=1"));
+    if (waitResponse() != 1) {
+      return false;
+    }
+
+    // start task, set APN
+    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
+    sendAT(GF("+CIFSR;E0"));
+    if (waitResponse(10000L) != 1) {
+      return false;
+    }
+
+    // set DNS config
+    sendAT(GF("+CDNSCFG=\"8.8.8.8\",\"8.8.4.4\""));
+    if (waitResponse() != 1) {
+      return false;
+    }
+
+    return true;
+  }
+
+  bool gprsDisconnect() {
+    sendAT(GF("+QIDEACT"));
+    return waitResponse(60000L) == 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();
+    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) {
+    sendAT(GF("+CIPSSL="), ssl);
+    int rsp = waitResponse();
+    if (ssl && rsp != 1) {
+      return false;
+    }
+    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));
+    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) {
+    const unsigned long timeout = 1000L;
+    unsigned long startMillis = millis();
+    while (millis() - startMillis < timeout) {
+      while (millis() - startMillis < timeout && !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, GsmConstStr r6=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();
+    String r6s(r6); r6s.trim();
+    DBG("### ..:", r1s, ",", r2s, ",", r3s, ",", r4s, ",", r5s, ",", r6s);
+    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 (r6 && data.endsWith(r6)) {
+          index = 6;
+          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]->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]->sock_connected = false;
+          }
+          data = "";
+          DBG("### Closed: ", mux);
+        }
+      }
+    } while (millis() - startMillis < timeout);
+finish:
+    if (!index) {
+      data.trim();
+      if (data.length()) {
+        DBG("### Unhandled:", data);
+      }
+      data = "";
+    }
+    DBG('<', index, '>');
+    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, GsmConstStr r6=NULL)
+  {
+    String data;
+    return waitResponse(timeout, data, r1, r2, r3, r4, r5, r6);
+  }
+
+  uint8_t waitResponse(GsmConstStr r1=GFP(GSM_OK), GsmConstStr r2=GFP(GSM_ERROR),
+                       GsmConstStr r3=NULL, GsmConstStr r4=NULL, GsmConstStr r5=NULL, GsmConstStr r6=NULL)
+  {
+    return waitResponse(1000, r1, r2, r3, r4, r5, r6);
+  }
+
+public:
+  Stream&       stream;
+
+protected:
+  GsmClient*    sockets[TINY_GSM_MUX_COUNT];
+};
+
+#endif