Axeda demo software for u-blox C027 (GSM)

Dependencies:   mbed

Revision:
0:a725e8eab383
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C027_Support/MDM.cpp	Mon Aug 11 19:02:42 2014 +0000
@@ -0,0 +1,1671 @@
+#include "mbed.h"
+#include "MDM.h"
+#ifdef TARGET_UBLOX_C027
+ #include "C027_api.h"
+#endif
+#include "MDMAPN.h"
+                
+#define PROFILE         "0"   //!< this is the psd profile used
+#define MAX_SIZE        128   //!< max expected messages
+// num sockets
+#define NUMSOCKETS      (sizeof(_sockets)/sizeof(*_sockets))
+//! test if it is a socket is ok to use
+#define ISSOCKET(s)     (((s) >= 0) && ((s) < NUMSOCKETS) && (_sockets[s].handle != SOCKET_ERROR))
+//! check for timeout
+#define TIMEOUT(t, ms)  ((ms != TIMEOUT_BLOCKING) && (ms < t.read_ms())) 
+//! registration ok check helper
+#define REG_OK(r)       ((r == REG_HOME) || (r == REG_ROAMING)) 
+//! registration done check helper (no need to poll further)
+#define REG_DONE(r)     ((r == REG_HOME) || (r == REG_ROAMING) || (r == REG_DENIED)) 
+//! helper to make sure that lock unlock pair is always balaced 
+#define LOCK()         { lock() 
+//! helper to make sure that lock unlock pair is always balaced 
+#define UNLOCK()       } unlock()
+
+#ifdef MDM_DEBUG
+ #if 1 // colored terminal output using ANSI escape sequences
+  #define COL(c) "\033[" c
+ #else
+  #define COL(c) 
+ #endif
+ #define DEF COL("39m")
+ #define BLA COL("30m")
+ #define RED COL("31m")
+ #define GRE COL("32m")
+ #define YEL COL("33m")
+ #define BLU COL("34m")
+ #define MAG COL("35m")
+ #define CYA COL("36m")
+ #define WHY COL("37m")
+ 
+void dumpAtCmd(const char* buf, int len)
+{
+    ::printf(" %3d \"", len);
+    while (len --) {
+        char ch = *buf++;
+        if ((ch > 0x1F) && (ch != 0x7F)) { // is printable
+            if      (ch == '%')  ::printf("%%");
+            else if (ch == '"')  ::printf("\\\"");
+            else if (ch == '\\') ::printf("\\\\");
+            else putchar(ch);
+        } else {
+            if      (ch == '\a') ::printf("\\a"); // BEL (0x07)
+            else if (ch == '\b') ::printf("\\b"); // Backspace (0x08)
+            else if (ch == '\t') ::printf("\\t"); // Horizontal Tab (0x09)
+            else if (ch == '\n') ::printf("\\n"); // Linefeed (0x0A)
+            else if (ch == '\v') ::printf("\\v"); // Vertical Tab (0x0B)
+            else if (ch == '\f') ::printf("\\f"); // Formfeed (0x0C)
+            else if (ch == '\r') ::printf("\\r"); // Carriage Return (0x0D)
+            else                 ::printf("\\x%02x", (unsigned char)ch);
+        }
+    }
+    ::printf("\"\r\n");
+}
+ 
+ #define ERROR(...)     (_debugLevel < 0) ? : ::printf(RED), ::printf(__VA_ARGS__), ::printf(DEF) 
+ #define TEST(...)                            ::printf(CYA), ::printf(__VA_ARGS__), ::printf(DEF)  
+ #define INFO(...)      (_debugLevel < 1) ? : ::printf(GRE), ::printf(__VA_ARGS__), ::printf(DEF) 
+ #define TRACE(...)     (_debugLevel < 2) ? : ::printf(__VA_ARGS__)
+ 
+#else
+ 
+ #define ERROR(...) (void)0 // no tracing
+ #define TEST(...)  (void)0 // no tracing
+ #define INFO(...)  (void)0 // no tracing
+ #define TRACE(...) (void)0 // no tracing
+
+#endif
+
+MDMParser* MDMParser::inst;
+
+MDMParser::MDMParser(void)
+{
+    inst = this;
+    memset(&_dev, 0, sizeof(_dev));
+    memset(&_net, 0, sizeof(_net));
+    _net.lac = 0xFFFF;
+    _net.ci = 0xFFFFFFFF;
+    _ip        = NOIP;
+    _init      = false;
+    memset(_sockets, 0, sizeof(_sockets));
+    for (int socket = 0; socket < NUMSOCKETS; socket ++)
+        _sockets[socket].handle = SOCKET_ERROR;
+#ifdef MDM_DEBUG
+    _debugLevel = 1;
+    _debugTime.start();
+#endif
+}
+
+int MDMParser::send(const char* buf, int len)
+{
+#ifdef MDM_DEBUG
+    if (_debugLevel >= 3) {
+        ::printf("%10.3f AT send    ", _debugTime.read_ms()*0.001);
+        dumpAtCmd(buf,len);
+    }
+#endif
+    return _send(buf, len);
+}
+
+int MDMParser::sendFormated(const char* format, ...) {
+    char buf[MAX_SIZE];
+    va_list args;
+    va_start(args, format);
+    int len = vsnprintf(buf,sizeof(buf), format, args);
+    va_end(args);
+    return send(buf, len);
+}
+
+int MDMParser::waitFinalResp(_CALLBACKPTR cb /* = NULL*/, 
+                             void* param /* = NULL*/, 
+                             int timeout_ms /*= 5000*/)
+{
+    char buf[MAX_SIZE + 64 /* add some more space for framing */]; 
+    Timer timer;
+    timer.start();
+    do {
+        int ret = getLine(buf, sizeof(buf));
+#ifdef MDM_DEBUG
+        if ((_debugLevel >= 3) && (ret != WAIT) && (ret != NOT_FOUND))
+        {
+            int len = LENGTH(ret);
+            int type = TYPE(ret);
+            const char* s = (type == TYPE_UNKNOWN)? YEL "UNK" DEF : 
+                            (type == TYPE_TEXT)   ? MAG "TXT" DEF : 
+                            (type == TYPE_OK   )  ? GRE "OK " DEF : 
+                            (type == TYPE_ERROR)  ? RED "ERR" DEF : 
+                            (type == TYPE_PLUS)   ? CYA " + " DEF : 
+                            (type == TYPE_PROMPT) ? BLU " > " DEF : 
+                                                        "..." ;
+            ::printf("%10.3f AT read %s", _debugTime.read_ms()*0.001, s);
+            dumpAtCmd(buf, len);
+        }
+#endif        
+        if ((ret != WAIT) && (ret != NOT_FOUND))
+        {
+            int type = TYPE(ret);
+            // handle unsolicited commands here
+            if (type == TYPE_PLUS) {
+                const char* cmd = buf+3;
+                int a, b, c, d, r;
+                char s[32];
+
+                // SMS Command ---------------------------------
+                // +CNMI: <mem>,<index>
+                if (sscanf(cmd, "CMTI: \"%*[^\"]\",%d", &a) == 1) { 
+                    TRACE("New SMS at index %d\r\n", a);
+                // Socket Specific Command ---------------------------------
+                // +UUSORD: <socket>,<length>
+                } else if ((sscanf(cmd, "UUSORD: %d,%d", &a, &b) == 2)) {
+                    int socket = _findSocket(a);
+                    TRACE("Socket %d: handle %d has %d bytes pending\r\n", socket, a, b);
+                    if (socket != SOCKET_ERROR)
+                        _sockets[socket].pending = b;
+                // +UUSORF: <socket>,<length>
+                } else if ((sscanf(cmd, "UUSORF: %d,%d", &a, &b) == 2)) {
+                    int socket = _findSocket(a);
+                    TRACE("Socket %d: handle %d has %d bytes pending\r\n", socket, a, b);
+                    if (socket != SOCKET_ERROR)
+                        _sockets[socket].pending = b;
+                // +UUSOCL: <socket>
+                } else if ((sscanf(cmd, "UUSOCL: %d", &a) == 1)) {
+                    int socket = _findSocket(a);
+                    TRACE("Socket %d: handle %d closed by remote host\r\n", socket, a);
+                    if ((socket != SOCKET_ERROR) && _sockets[socket].connected)
+                        _sockets[socket].connected = false;
+                }
+                if (_dev.dev == DEV_LISA_C200) {
+                    // CDMA Specific -------------------------------------------
+                    // +CREG: <n><SID>,<NID>,<stat>
+                    if (sscanf(cmd, "CREG: %*d,%d,%d,%d",&a,&b,&c) == 3) {
+                        // _net.sid = a;
+                        // _net.nid = b;
+                        if      (c == 0) _net.csd = REG_NONE;     // not registered, home network
+                        else if (c == 1) _net.csd = REG_HOME;     // registered, home network
+                        else if (c == 2) _net.csd = REG_NONE;     // not registered, but MT is currently searching a new operator to register to
+                        else if (c == 3) _net.csd = REG_DENIED;   // registration denied
+                        else if (c == 5) _net.csd = REG_ROAMING;  // registered, roaming
+                        _net.psd = _net.csd; // fake PSD registration (CDMA is always registered)
+                        _net.act = ACT_CDMA;
+                        // +CSS: <mode>[,<format>,<oper>[,<AcT>]]
+                    } else if (sscanf(cmd, "CSS %*c,%2s,%*d",s) == 1) {
+                        //_net.reg = (strcmp("Z", s) == 0) ? REG_UNKNOWN : REG_HOME;
+                    }
+                } else {
+                    // GSM/UMTS Specific -------------------------------------------
+                    // +UUPSDD: <profile_id> 
+                    if (sscanf(cmd, "UUPSDD: %d",&a) == 1) {
+                        if (*PROFILE == a) _ip = NOIP;
+                    } else {
+                        // +CREG|CGREG: <n>,<stat>[,<lac>,<ci>[,AcT[,<rac>]]] // reply to AT+CREG|AT+CGREG
+                        // +CREG|CGREG: <stat>[,<lac>,<ci>[,AcT[,<rac>]]]     // URC
+                        b = 0xFFFF; c = 0xFFFFFFFF; d = -1;
+                        r = sscanf(cmd, "%s %*d,%d,\"%X\",\"%X\",%d",s,&a,&b,&c,&d);
+                        if (r <= 1)
+                            r = sscanf(cmd, "%s %d,\"%X\",\"%X\",%d",s,&a,&b,&c,&d);
+                        if (r >= 2) {
+                            Reg *reg = !strcmp(s, "CREG:")  ? &_net.csd : 
+                                       !strcmp(s, "CGREG:") ? &_net.psd : NULL;
+                            if (reg) {
+                                // network status
+                                if      (a == 0) *reg = REG_NONE;     // 0: not registered, home network
+                                else if (a == 1) *reg = REG_HOME;     // 1: registered, home network
+                                else if (a == 2) *reg = REG_NONE;     // 2: not registered, but MT is currently searching a new operator to register to
+                                else if (a == 3) *reg = REG_DENIED;   // 3: registration denied
+                                else if (a == 4) *reg = REG_UNKNOWN;  // 4: unknown
+                                else if (a == 5) *reg = REG_ROAMING;  // 5: registered, roaming
+                                if ((r >= 3) && (b != 0xFFFF))      _net.lac = b; // location area code
+                                if ((r >= 4) && (c != 0xFFFFFFFF))  _net.ci  = c; // cell ID
+                                // access technology
+                                if (r >= 5) {
+                                    if      (d == 0) _net.act = ACT_GSM;      // 0: GSM
+                                    else if (d == 1) _net.act = ACT_GSM;      // 1: GSM COMPACT
+                                    else if (d == 2) _net.act = ACT_UTRAN;    // 2: UTRAN
+                                    else if (d == 3) _net.act = ACT_EDGE;     // 3: GSM with EDGE availability
+                                    else if (d == 4) _net.act = ACT_UTRAN;    // 4: UTRAN with HSDPA availability
+                                    else if (d == 5) _net.act = ACT_UTRAN;    // 5: UTRAN with HSUPA availability
+                                    else if (d == 6) _net.act = ACT_UTRAN;    // 6: UTRAN with HSDPA and HSUPA availability
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            if (cb) {
+                int len = LENGTH(ret);
+                int ret = cb(type, buf, len, param);
+                if (WAIT != ret)
+                    return ret; 
+            }
+            if (type == TYPE_OK)
+                return RESP_OK;
+            if (type == TYPE_ERROR)
+                return RESP_ERROR;
+            if (type == TYPE_PROMPT)    
+                return RESP_PROMPT;
+        }
+        // relax a bit
+        wait_ms(10); 
+    }
+    while (!TIMEOUT(timer, timeout_ms));
+    return WAIT;
+}
+
+int MDMParser::_cbString(int type, const char* buf, int len, char* str)
+{
+    if (str && (type == TYPE_UNKNOWN)) {
+        if (sscanf(buf, "\r\n%s\r\n", str) == 1)
+            /*nothing*/;
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbInt(int type, const char* buf, int len, int* val)
+{
+    if (val && (type == TYPE_UNKNOWN)) {
+        if (sscanf(buf, "\r\n%d\r\n", val) == 1)
+            /*nothing*/;
+    }
+    return WAIT;
+}
+
+// ----------------------------------------------------------------
+
+bool MDMParser::connect(
+            const char* simpin, 
+            const char* apn, const char* username, 
+            const char* password, Auth auth,
+            PinName pn)
+{
+    bool ok = init(simpin, NULL, pn);  
+#ifdef MDM_DEBUG
+    if (_debugLevel >= 1) dumpDevStatus(&_dev);
+#endif
+    if (!ok)
+        return false;
+    ok = registerNet();
+#ifdef MDM_DEBUG
+    if (_debugLevel >= 1) dumpNetStatus(&_net);
+#endif
+    if (!ok)
+        return false;
+    IP ip = join(apn,username,password,auth);
+#ifdef MDM_DEBUG
+    if (_debugLevel >= 1) dumpIp(ip);
+#endif
+    if (ip == NOIP)
+        return false; 
+    return true;
+}
+
+bool MDMParser::init(const char* simpin, DevStatus* status, PinName pn)
+{
+    int i = 10;
+    LOCK();
+    memset(&_dev, 0, sizeof(_dev));
+    if (pn != NC) {
+        INFO("Modem::wakeup\r\n");
+        DigitalOut pin(pn, 1);
+        while (i--) {
+            // SARA-U2/LISA-U2 50..80us
+            pin = 0; ::wait_us(50);
+            pin = 1; ::wait_ms(10); 
+            
+            // SARA-G35 >5ms, LISA-C2 > 150ms, LEON-G2 >5ms
+            pin = 0; ::wait_ms(150);
+            pin = 1; ::wait_ms(100);
+            
+            // purge any messages 
+            purge();
+            
+            // check interface
+            sendFormated("AT\r\n");
+            int r = waitFinalResp(NULL,NULL,1000);
+            if(RESP_OK == r) break;
+        }
+        if (i < 0) {
+            ERROR("No Reply from Modem\r\n");
+            goto failure;
+        }
+    }
+    _init = true;
+    
+    INFO("Modem::init\r\n");
+    // echo off
+    sendFormated("AT E0\r\n");
+    if(RESP_OK != waitFinalResp())
+        goto failure; 
+    // enable verbose error messages
+    sendFormated("AT+CMEE=2\r\n");
+    if(RESP_OK != waitFinalResp())
+        goto failure;
+    // set baud rate
+    sendFormated("AT+IPR=115200\r\n");
+    if (RESP_OK != waitFinalResp())
+        goto failure;
+    wait_ms(40);
+    // identify the module 
+    sendFormated("ATI\r\n");
+    if (RESP_OK != waitFinalResp(_cbATI, &_dev.dev))
+        goto failure;
+    if (_dev.dev == DEV_UNKNOWN)
+        goto failure;
+    // device specific init
+    if (_dev.dev == DEV_LISA_C200) {
+        // get the manufacturer
+        sendFormated("AT+GMI\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.manu))
+            goto failure;
+        // get the model identification
+        sendFormated("AT+GMM\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.model))
+            goto failure;
+        // get the sw version
+        sendFormated("AT+GMR\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.ver))
+            goto failure;
+        // get the pseudo ESN or MEID
+        sendFormated("AT+GSN\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.meid))
+            goto failure;
+#if 0
+        // enable power saving
+        if (_dev.lpm != LPM_DISABLED) {
+             // enable power saving (requires flow control, cts at least)
+            sendFormated("AT+UPSV=1,1280\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;  
+            _dev.lpm = LPM_ACTIVE;
+        }
+#endif
+    } else {
+        if ((_dev.dev == DEV_LISA_U200) || (_dev.dev == DEV_LEON_G200)) {
+            // enable the network identification feature 
+            sendFormated("AT+UGPIOC=20,2\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;
+        } else if ((_dev.dev == DEV_SARA_U260) || (_dev.dev == DEV_SARA_U270) || 
+                   (_dev.dev == DEV_SARA_G350)) {
+            // enable the network identification feature 
+            sendFormated("AT+UGPIOC=16,2\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;
+        }
+        // check the sim card
+        for (int i = 0; (i < 5) && (_dev.sim != SIM_READY); i++) {
+            sendFormated("AT+CPIN?\r\n");
+            int ret = waitFinalResp(_cbCPIN, &_dev.sim);
+            // having an error here is ok (sim may still be initializing)
+            if ((RESP_OK != ret) && (RESP_ERROR != ret))
+                goto failure;
+            // Enter PIN if needed
+            if (_dev.sim == SIM_PIN) {
+                if (!simpin) {
+                    ERROR("SIM PIN not available\r\n");
+                    goto failure;
+                }
+                sendFormated("AT+CPIN=%s\r\n", simpin);
+                if (RESP_OK != waitFinalResp(_cbCPIN, &_dev.sim))
+                    goto failure;
+            } else if (_dev.sim != SIM_READY) {
+                wait_ms(1000);
+            }
+        }
+        if (_dev.sim != SIM_READY) {
+            if (_dev.sim == SIM_MISSING)
+                ERROR("SIM not inserted\r\n");
+            goto failure;
+        }
+        // get the manufacturer
+        sendFormated("AT+CGMI\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.manu))
+            goto failure;
+        // get the model identification
+        sendFormated("AT+CGMM\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.model))
+            goto failure;
+        // get the 
+        sendFormated("AT+CGMR\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.ver))
+            goto failure;            
+        // Returns the ICCID (Integrated Circuit Card ID) of the SIM-card. 
+        // ICCID is a serial number identifying the SIM.
+        sendFormated("AT+CCID\r\n");
+        if (RESP_OK != waitFinalResp(_cbCCID, _dev.ccid))
+            goto failure;
+        // Returns the product serial number, IMEI (International Mobile Equipment Identity)
+        sendFormated("AT+CGSN\r\n");
+        if (RESP_OK != waitFinalResp(_cbString, _dev.imei))
+            goto failure;
+        // enable power saving
+        if (_dev.lpm != LPM_DISABLED) {
+             // enable power saving (requires flow control, cts at least)
+            sendFormated("AT+UPSV=1\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;  
+            _dev.lpm = LPM_ACTIVE;
+        }
+        // enable the psd registration unsolicited result code
+        sendFormated("AT+CGREG=2\r\n");
+        if (RESP_OK != waitFinalResp())
+            goto failure;
+    } 
+    // enable the network registration unsolicited result code
+    sendFormated("AT+CREG=%d\r\n", (_dev.dev == DEV_LISA_C200) ? 1 : 2);
+    if (RESP_OK != waitFinalResp())
+        goto failure;
+    // Setup SMS in text mode 
+    sendFormated("AT+CMGF=1\r\n");
+    if (RESP_OK != waitFinalResp())
+        goto failure;
+    // setup new message indication
+    sendFormated("AT+CNMI=2,1\r\n");
+    if (RESP_OK != waitFinalResp())
+        goto failure;
+    // Request IMSI (International Mobile Subscriber Identification)
+    sendFormated("AT+CIMI\r\n");
+    if (RESP_OK != waitFinalResp(_cbString, _dev.imsi))
+        goto failure;
+    if (status)
+        memcpy(status, &_dev, sizeof(DevStatus));
+    UNLOCK();
+    return true; 
+failure:
+    unlock();
+    return false; 
+}
+
+bool MDMParser::powerOff(void)
+{
+    bool ok = false;
+    if (_init) {
+        LOCK();
+        INFO("Modem::powerOff\r\n");
+        sendFormated("AT+CPWROFF\r\n");
+        if (RESP_OK == waitFinalResp(NULL,NULL,120*1000)) {
+            _init = false;
+            ok = true;
+        }
+        UNLOCK();
+    }
+    return ok;
+}
+
+int MDMParser::_cbATI(int type, const char* buf, int len, Dev* dev)
+{
+    if ((type == TYPE_UNKNOWN) && dev) {
+        if      (strstr(buf, "SARA-G350")) *dev = DEV_SARA_G350;
+        else if (strstr(buf, "LISA-U200")) *dev = DEV_LISA_U200;
+        else if (strstr(buf, "LISA-C200")) *dev = DEV_LISA_C200;
+        else if (strstr(buf, "SARA-U260")) *dev = DEV_SARA_U260;
+        else if (strstr(buf, "SARA-U270")) *dev = DEV_SARA_U270;
+        else if (strstr(buf, "LEON-G200")) *dev = DEV_LEON_G200;
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbCPIN(int type, const char* buf, int len, Sim* sim)
+{
+    if (sim) {
+        if (type == TYPE_PLUS){
+            char s[16];
+            if (sscanf(buf, "\r\n+CPIN: %[^\r]\r\n", s) >= 1)
+                *sim = (0 == strcmp("READY", s)) ? SIM_READY : SIM_PIN;
+        } else if (type == TYPE_ERROR) {
+            if (strstr(buf, "+CME ERROR: SIM not inserted"))
+                *sim = SIM_MISSING;
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbCCID(int type, const char* buf, int len, char* ccid)
+{
+    if ((type == TYPE_PLUS) && ccid){
+        if (sscanf(buf, "\r\n+CCID: %[^\r]\r\n", ccid) == 1)
+            /*TRACE("Got CCID: %s\r\n", ccid)*/;
+    }
+    return WAIT;
+}
+
+bool MDMParser::registerNet(NetStatus* status /*= NULL*/, int timeout_ms /*= 180000*/) 
+{
+    Timer timer;
+    timer.start();
+    INFO("Modem::register\r\n");
+    while (!checkNetStatus(status) && !TIMEOUT(timer, timeout_ms))
+        wait_ms(1000);
+    if (_net.csd == REG_DENIED) ERROR("CSD Registration Denied\r\n");
+    if (_net.psd == REG_DENIED) ERROR("PSD Registration Denied\r\n");
+    return REG_OK(_net.csd) || REG_OK(_net.psd);
+}
+
+bool MDMParser::checkNetStatus(NetStatus* status /*= NULL*/)
+{
+    bool ok = false;
+    LOCK();
+    memset(&_net, 0, sizeof(_net));
+    _net.lac = 0xFFFF;
+    _net.ci = 0xFFFFFFFF;
+    // check registration
+    sendFormated("AT+CREG?\r\n");
+    waitFinalResp();     // don't fail as service could be not subscribed 
+    if (_dev.dev != DEV_LISA_C200) {
+        // check PSD registration
+        sendFormated("AT+CGREG?\r\n");
+        waitFinalResp(); // don't fail as service could be not subscribed 
+    }
+    if (REG_OK(_net.csd) || REG_OK(_net.psd))
+    {
+        // check modem specific status messages 
+        if (_dev.dev == DEV_LISA_C200) {
+            sendFormated("AT+CSS?\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;
+            while (1) {
+                // get the Telephone number
+                sendFormated("AT$MDN?\r\n");
+                if (RESP_OK != waitFinalResp(_cbString, _net.num))
+                    goto failure;
+                // check if we have a Mobile Directory Number
+                if (*_net.num && (memcmp(_net.num, "000000", 6) != 0))
+                    break;
+                    
+                INFO("Device not yet activated\r\n");
+                INFO("Make sure you have a valid contract with the network operator for this device.\r\n");
+                // Check if the the version contains a V for Verizon 
+                // Verizon: E0.V.xx.00.xxR, 
+                // Sprint E0.S.xx.00.xxR
+                if (_dev.ver[3] == 'V') { 
+                    int i;
+                    INFO("Start device over-the-air activation (this can take a few minutes)\r\n");
+                    sendFormated("AT+CDV=*22899\r\n");
+                    i = 1;
+                    if ((RESP_OK != waitFinalResp(_cbUACTIND, &i, 120*1000)) || (i == 1)) {
+                        ERROR("Device over-the-air activation failed\r\n");
+                        goto failure;
+                    }
+                    INFO("Device over-the-air activation successful\r\n");
+                    
+                    INFO("Start PRL over-the-air update (this can take a few minutes)\r\n");
+                    sendFormated("AT+CDV=*22891\r\n");
+                    i = 1;
+                    if ((RESP_OK != waitFinalResp(_cbUACTIND, &i, 120*1000)) || (i == 1)) {
+                        ERROR("PRL over-the-air update failed\r\n");
+                        goto failure;
+                    }
+                    INFO("PRL over-the-air update successful\r\n");
+                    
+                } else { 
+                    // Sprint or Aeris 
+                    INFO("Wait for OMA-DM over-the-air activation (this can take a few minutes)\r\n");
+                    wait_ms(120*1000);
+                }
+            }
+            // get the the Network access identifier string
+            char nai[64];
+            sendFormated("AT$QCMIPNAI?\r\n");
+            if (RESP_OK != waitFinalResp(_cbString, nai))
+                goto failure;
+        } else {
+            sendFormated("AT+COPS?\r\n");
+            if (RESP_OK != waitFinalResp(_cbCOPS, &_net))
+                goto failure;
+            // get the MSISDNs related to this subscriber
+            sendFormated("AT+CNUM\r\n");
+            if (RESP_OK != waitFinalResp(_cbCNUM, _net.num))
+                goto failure;
+        }  
+        // get the signal strength indication
+        sendFormated("AT+CSQ\r\n");
+        if (RESP_OK != waitFinalResp(_cbCSQ, &_net))
+            goto failure;
+    }
+    if (status) {
+        memcpy(status, &_net, sizeof(NetStatus));
+    }
+    ok = REG_DONE(_net.csd) && REG_DONE(_net.psd);
+    UNLOCK();
+    return ok;
+failure:
+    unlock();
+    return false;
+}
+
+int MDMParser::_cbCOPS(int type, const char* buf, int len, NetStatus* status)
+{
+    if ((type == TYPE_PLUS) && status){
+        int act = 99;
+        // +COPS: <mode>[,<format>,<oper>[,<AcT>]]
+        if (sscanf(buf, "\r\n+COPS: %*d,%*d,\"%[^\"]\",%d",status->opr,&act) >= 1) {
+            if      (act == 0) status->act = ACT_GSM;      // 0: GSM, 
+            else if (act == 2) status->act = ACT_UTRAN;    // 2: UTRAN
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbCNUM(int type, const char* buf, int len, char* num)
+{
+    if ((type == TYPE_PLUS) && num){
+        int a;
+        if ((sscanf(buf, "\r\n+CNUM: \"My Number\",\"%31[^\"]\",%d", num, &a) == 2) && 
+            ((a == 129) || (a == 145))) {
+        }
+    }
+    return WAIT;
+}
+                    
+int MDMParser::_cbCSQ(int type, const char* buf, int len, NetStatus* status)
+{
+    if ((type == TYPE_PLUS) && status){
+        int a,b;
+        char _ber[] = { 49, 43, 37, 25, 19, 13, 7, 0 }; // see 3GPP TS 45.008 [20] subclause 8.2.4
+        // +CSQ: <rssi>,<qual>
+        if (sscanf(buf, "\r\n+CSQ: %d,%d",&a,&b) == 2) {
+            if (a != 99) status->rssi = -113 + 2*a;  // 0: -113 1: -111 ... 30: -53 dBm with 2 dBm steps
+            if ((b != 99) && (b < sizeof(_ber))) status->ber = _ber[b];  // 
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbUACTIND(int type, const char* buf, int len, int* i)
+{
+    if ((type == TYPE_PLUS) && i){
+        int a;
+        if (sscanf(buf, "\r\n+UACTIND: %d", &a) == 1) {
+            *i = a;
+        }
+    }
+    return WAIT;
+}
+
+// ----------------------------------------------------------------
+// internet connection 
+
+MDMParser::IP MDMParser::join(const char* apn /*= NULL*/, const char* username /*= NULL*/, 
+                              const char* password /*= NULL*/, Auth auth /*= AUTH_DETECT*/)
+{
+    LOCK();
+    INFO("Modem::join\r\n");
+    _ip = NOIP;
+    if (_dev.dev == DEV_LISA_C200) {
+        // make a dumy dns lookup (which will fail, so ignore the result) 
+        sendFormated("AT+UDNSRN=0,\"u-blox.com\"\r\n");
+        waitFinalResp(); 
+        // This fake lookup will enable the IP connection and we 
+        // should have an IP after this, so we check it
+        
+        //Get local IP address
+        sendFormated("AT+CMIP?\r\n");
+        if (RESP_OK != waitFinalResp(_cbCMIP, &_ip))
+            goto failure;
+    } else { 
+        // check gprs attach status 
+        sendFormated("AT+CGATT=1\r\n");
+        if (RESP_OK != waitFinalResp(NULL,NULL,3*60*1000)) 
+            goto failure;
+        
+        // Check the profile
+        int a = 0;
+        bool force = true;
+        sendFormated("AT+UPSND=" PROFILE ",8\r\n");
+        if (RESP_OK != waitFinalResp(_cbUPSND, &a))
+            goto failure;
+        if (a == 1 && force) {
+            // disconnect the profile already if it is connected 
+            sendFormated("AT+UPSDA=" PROFILE ",4\r\n");
+            if (RESP_OK != waitFinalResp(NULL,NULL,40*1000))
+                goto failure;
+            a = 0;
+        }
+        if (a == 0) {
+            bool ok = false;
+            // try to lookup the apn settings from our local database by mccmnc
+            const char* config = NULL;
+            if (!apn && !username && !password)
+                config = apnconfig(_dev.imsi);
+            
+            // Set up the dynamic IP address assignment.
+            sendFormated("AT+UPSD=" PROFILE ",7,\"0.0.0.0\"\r\n");
+            if (RESP_OK != waitFinalResp())
+                goto failure;
+ 
+            do {
+                if (config) {
+                    apn      = _APN_GET(config);
+                    username = _APN_GET(config);
+                    password = _APN_GET(config);
+                    TRACE("Testing APN Settings(\"%s\",\"%s\",\"%s\")\r\n", apn, username, password);
+                }
+                // Set up the APN
+                if (apn && *apn) {
+                    sendFormated("AT+UPSD=" PROFILE ",1,\"%s\"\r\n", apn);
+                    if (RESP_OK != waitFinalResp())
+                        goto failure;
+                }
+                if (username && *username) {
+                    sendFormated("AT+UPSD=" PROFILE ",2,\"%s\"\r\n", username);
+                    if (RESP_OK != waitFinalResp())
+                        goto failure;
+                }
+                if (password && *password) {
+                    sendFormated("AT+UPSD=" PROFILE ",3,\"%s\"\r\n", password);
+                    if (RESP_OK != waitFinalResp())
+                        goto failure;
+                }
+                // try different Authentication Protocols
+                // 0 = none 
+                // 1 = PAP (Password Authentication Protocol)
+                // 2 = CHAP (Challenge Handshake Authentication Protocol)
+                for (int i = AUTH_NONE; i <= AUTH_CHAP && !ok; i ++) {
+                    if ((auth == AUTH_DETECT) || (auth == i)) {
+                        // Set up the Authentication Protocol
+                        sendFormated("AT+UPSD=" PROFILE ",6,%d\r\n", i);
+                        if (RESP_OK != waitFinalResp())
+                            goto failure;
+                        // Activate the profile and make connection
+                        sendFormated("AT+UPSDA=" PROFILE ",3\r\n");
+                        if (RESP_OK == waitFinalResp(NULL,NULL,150*1000))
+                            ok = true;
+                    }
+                }
+            } while (!ok && config && *config); // maybe use next setting ? 
+            if (!ok) {
+                ERROR("Your modem APN/password/username may be wrong\r\n");
+                goto failure;
+            }
+        }
+        //Get local IP address
+        sendFormated("AT+UPSND=" PROFILE ",0\r\n");
+        if (RESP_OK != waitFinalResp(_cbUPSND, &_ip))
+            goto failure;
+    }
+    UNLOCK();
+    return _ip;
+failure: 
+    unlock();
+    return NOIP;
+}
+
+int MDMParser::_cbUDOPN(int type, const char* buf, int len, char* mccmnc)
+{
+    if ((type == TYPE_PLUS) && mccmnc) {
+        if (sscanf(buf, "\r\n+UDOPN: 0,\"%[^\"]\"", mccmnc) == 1)
+            ;
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbCMIP(int type, const char* buf, int len, IP* ip)
+{
+    if ((type == TYPE_UNKNOWN) && ip) {
+        int a,b,c,d;
+        if (sscanf(buf, "\r\n" IPSTR, &a,&b,&c,&d) == 4)
+            *ip = IPADR(a,b,c,d);
+    }
+    return WAIT;
+}
+        
+int MDMParser::_cbUPSND(int type, const char* buf, int len, int* act)
+{
+    if ((type == TYPE_PLUS) && act) {
+        if (sscanf(buf, "\r\n+UPSND: %*d,%*d,%d", act) == 1)
+            /*nothing*/;
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbUPSND(int type, const char* buf, int len, IP* ip)
+{
+    if ((type == TYPE_PLUS) && ip) {
+        int a,b,c,d;
+        // +UPSND=<profile_id>,<param_tag>[,<dynamic_param_val>]
+        if (sscanf(buf, "\r\n+UPSND: " PROFILE ",0,\"" IPSTR "\"", &a,&b,&c,&d) == 4)
+            *ip = IPADR(a,b,c,d);
+    }
+    return WAIT;
+}
+
+int MDMParser::_cbUDNSRN(int type, const char* buf, int len, IP* ip)
+{
+    if ((type == TYPE_PLUS) && ip) {
+        int a,b,c,d;
+        if (sscanf(buf, "\r\n+UDNSRN: \"" IPSTR "\"", &a,&b,&c,&d) == 4)
+            *ip = IPADR(a,b,c,d);
+    }
+    return WAIT;
+}
+
+bool MDMParser::disconnect(void)
+{
+    bool ok = false;
+    LOCK();
+    INFO("Modem::disconnect\r\n");
+    if (_ip != NOIP) {
+        if (_dev.dev == DEV_LISA_C200) {
+            // There something to do here
+            _ip = NOIP;
+            ok = true;
+        } else { 
+            sendFormated("AT+UPSDA=" PROFILE ",4\r\n");
+            if (RESP_OK != waitFinalResp()) {
+                _ip = NOIP;
+                ok = true;
+            }
+        }
+    }
+    UNLOCK();
+    return ok;
+}
+
+MDMParser::IP MDMParser::gethostbyname(const char* host)
+{
+    IP ip = NOIP; 
+    int a,b,c,d;
+    if (sscanf(host, IPSTR, &a,&b,&c,&d) == 4)
+        ip = IPADR(a,b,c,d);
+    else {
+        LOCK();
+        sendFormated("AT+UDNSRN=0,\"%s\"\r\n", host);
+        if (RESP_OK != waitFinalResp(_cbUDNSRN, &ip))
+            ip = NOIP;
+        UNLOCK();
+    }
+    return ip;
+}
+
+// ----------------------------------------------------------------
+// sockets
+
+int MDMParser::_cbUSOCR(int type, const char* buf, int len, int* handle)
+{
+    if ((type == TYPE_PLUS) && handle) {
+        const char* p = strstr(buf,"+USOCR: "); 
+        if (p)
+            *handle = atoi(p+8);
+    }
+    return WAIT;
+}
+
+int MDMParser::socketSocket(IpProtocol ipproto, int port)
+{
+    int socket;
+    LOCK();
+    // find an free socket
+    socket = _findSocket();
+    TRACE("socketSocket(%d)\r\n", ipproto);
+    if (socket != SOCKET_ERROR) {
+        if ((ipproto == IPPROTO_UDP) && (port == -1)){
+            sendFormated("AT+USOCR=17\r\n");
+        } else if (ipproto == IPPROTO_UDP){
+            sendFormated("AT+USOCR=17,%d\r\n", port);
+        } else /*(ipproto == IPPROTO_TCP)*/ {
+            sendFormated("AT+USOCR=6\r\n");
+        } 
+        int handle = SOCKET_ERROR;
+        if ((RESP_OK == waitFinalResp(_cbUSOCR, &handle)) && 
+            (handle != SOCKET_ERROR)) {
+            TRACE("Socket %d: handle %d was created\r\n", socket, handle);
+            _sockets[socket].handle     = handle;
+            _sockets[socket].timeout_ms = TIMEOUT_BLOCKING;
+            _sockets[socket].connected  = false;
+            _sockets[socket].pending    = 0;
+        }
+        else
+            socket = SOCKET_ERROR;
+    }
+    UNLOCK();
+    return socket;
+}
+
+bool MDMParser::socketConnect(int socket, const char * host, int port)
+{
+    IP ip = gethostbyname(host);
+    if (ip == NOIP)
+        return false;
+    // connect to socket
+    bool ok = false; 
+    LOCK();
+    if (ISSOCKET(socket) && (!_sockets[socket].connected)) {
+        TRACE("socketConnect(%d,%s,%d)\r\n", socket,host,port);
+        sendFormated("AT+USOCO=%d,\"" IPSTR "\",%d\r\n", _sockets[socket].handle, IPNUM(ip), port);
+        if (RESP_OK == waitFinalResp())
+            ok = _sockets[socket].connected = true;
+    }
+    UNLOCK();
+    return ok;
+}
+
+bool MDMParser::socketIsConnected(int socket)
+{
+    bool ok = false;
+    LOCK();
+    TRACE("socketIsConnected(%d)\r\n", socket);
+    ok = ISSOCKET(socket) && _sockets[socket].connected;
+    UNLOCK();
+    return ok;
+}
+
+bool MDMParser::socketSetBlocking(int socket, int timeout_ms)
+{
+    bool ok = false;
+    LOCK();
+    TRACE("socketSetBlocking(%d,%d)\r\n", socket,timeout_ms);
+    if (ISSOCKET(socket)) {
+        _sockets[socket].timeout_ms = timeout_ms;
+        ok = true;
+    }
+    UNLOCK();
+    return ok;
+}
+
+bool  MDMParser::socketClose(int socket)
+{
+    bool ok = false;
+    LOCK();
+    if (ISSOCKET(socket) && _sockets[socket].connected) {
+        TRACE("socketClose(%d)\r\n", socket);
+        sendFormated("AT+USOCL=%d\r\n", _sockets[socket].handle);
+        if (RESP_OK == waitFinalResp()) {
+            _sockets[socket].connected = false;
+            ok = true;
+        }
+    }
+    UNLOCK();
+    return ok;
+}
+
+bool  MDMParser::socketFree(int socket)
+{
+    // make sure it is closed
+    socketClose(socket);
+    bool ok = true;
+    LOCK();
+    if (ISSOCKET(socket)) {
+        TRACE("socketFree(%d)\r\n",  socket);
+        _sockets[socket].handle     = SOCKET_ERROR;
+        _sockets[socket].timeout_ms = TIMEOUT_BLOCKING;
+        _sockets[socket].connected  = false;
+        _sockets[socket].pending    = 0;
+        ok = true;
+    }
+    UNLOCK();
+    return ok;
+}
+
+#define USO_MAX_WRITE 1024 //!< maximum number of bytes to write to socket
+
+int MDMParser::socketSend(int socket, const char * buf, int len)
+{
+    TRACE("socketSend(%d,%s,%d)\r\n", socket,buf,len);
+    int cnt = len;
+    while (cnt > 0) {
+        int blk = USO_MAX_WRITE;
+        if (cnt < blk) 
+            blk = cnt;
+        bool ok = false;
+        LOCK();
+        if (ISSOCKET(socket)) {
+            sendFormated("AT+USOWR=%d,%d\r\n",_sockets[socket].handle,blk);
+            if (RESP_PROMPT == waitFinalResp()) {
+                wait_ms(50);
+                TRACE("SENT: %s", buf);
+                send(buf, blk);
+                if (RESP_OK == waitFinalResp()) 
+                    ok = true;
+            }
+        }
+        UNLOCK();
+        if (!ok) 
+            return SOCKET_ERROR;
+        buf += blk;
+        cnt -= blk;
+    }
+    return (len - cnt);
+}
+
+int MDMParser::socketSendTo(int socket, IP ip, int port, const char * buf, int len)
+{
+    TRACE("socketSendTo(%d," IPSTR ",%d,,%d)\r\n", socket,IPNUM(ip),port,len);
+    int cnt = len;
+    while (cnt > 0) {
+        int blk = USO_MAX_WRITE;
+        if (cnt < blk) 
+            blk = cnt;
+        bool ok = false;
+        LOCK();
+        if (ISSOCKET(socket)) {
+            sendFormated("AT+USOST=%d,\"" IPSTR "\",%d,%d\r\n",_sockets[socket].handle,IPNUM(ip),port,blk);
+            if (RESP_PROMPT == waitFinalResp()) {
+                wait_ms(50);
+                send(buf, blk);
+                if (RESP_OK == waitFinalResp())
+                    ok = true;
+            }
+        }
+        UNLOCK();
+        if (!ok)
+            return SOCKET_ERROR;
+        buf += blk;
+        cnt -= blk;
+    }
+    return (len - cnt);
+}
+
+int MDMParser::socketReadable(int socket)
+{
+    int pending = SOCKET_ERROR;
+    LOCK();
+    if (ISSOCKET(socket) && _sockets[socket].connected) {
+        TRACE("socketReadable(%d)\r\n", socket);
+        // allow to receive unsolicited commands 
+        waitFinalResp(NULL, NULL, 0);
+        if (_sockets[socket].connected)
+           pending = _sockets[socket].pending; 
+    }
+    UNLOCK();
+    return pending;
+}
+
+int MDMParser::_cbUSORD(int type, const char* buf, int len, char* out)
+{
+    if ((type == TYPE_PLUS) && out) {
+        int sz, sk;
+        if ((sscanf(buf, "\r\n+USORD: %d,%d,", &sk, &sz) == 2) && 
+            (buf[len-sz-2] == '\"') && (buf[len-1] == '\"')) {
+            memcpy(out, &buf[len-1-sz], sz);
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::socketRecv(int socket, char* buf, int len)
+{
+    int cnt = 0;
+    TRACE("socketRecv(%d,,%d)\r\n", socket, len);
+#ifdef MDM_DEBUG
+    memset(buf, '\0', len);
+#endif
+    Timer timer;
+    timer.start();
+    while (len) {
+        int blk = MAX_SIZE; // still need space for headers and unsolicited  commands 
+        if (len < blk) blk = len;
+        bool ok = false;        
+        LOCK();
+        if (ISSOCKET(socket)) {
+            if (_sockets[socket].connected) {
+                if (_sockets[socket].pending < blk)
+                    blk = _sockets[socket].pending;
+                if (blk > 0) {
+                    sendFormated("AT+USORD=%d,%d\r\n",_sockets[socket].handle, blk);
+                    if (RESP_OK == waitFinalResp(_cbUSORD, buf)) {
+                        _sockets[socket].pending -= blk;
+                        len -= blk;
+                        cnt += blk;
+                        buf += blk;
+                        ok = true;
+                    }
+                } else if (!TIMEOUT(timer, _sockets[socket].timeout_ms)) {
+                    ok = (WAIT == waitFinalResp(NULL,NULL,0)); // wait for URCs
+                } else {
+                    len = 0;
+                    ok = true;
+                }
+            } else {
+                len = 0;
+                ok = true;
+            }
+        }
+        UNLOCK();
+        if (!ok)
+            return SOCKET_ERROR;
+    }
+    return cnt;
+}
+
+int MDMParser::_cbUSORF(int type, const char* buf, int len, USORFparam* param)
+{
+    if ((type == TYPE_PLUS) && param) {
+        int sz, sk, p, a,b,c,d;
+        int r = sscanf(buf, "\r\n+USORF: %d,\"" IPSTR "\",%d,%d,", 
+            &sk,&a,&b,&c,&d,&p,&sz);
+        if ((r == 7) && (buf[len-sz-2] == '\"') && (buf[len-1] == '\"')) {
+            memcpy(param->buf, &buf[len-1-sz], sz);
+            param->ip = IPADR(a,b,c,d);
+            param->port = p;
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::socketRecvFrom(int socket, IP* ip, int* port, char* buf, int len)
+{
+    int cnt = 0;
+    TRACE("socketRecvFrom(%d,,%d)\r\n", socket, len);
+#ifdef MDM_DEBUG
+    memset(buf, '\0', len);
+#endif
+    Timer timer;
+    timer.start();
+    while (len) {
+        int blk = MAX_SIZE; // still need space for headers and unsolicited commands 
+        if (len < blk) blk = len;
+        bool ok = false;        
+        LOCK();
+        if (ISSOCKET(socket)) {
+            if (_sockets[socket].pending < blk)
+                blk = _sockets[socket].pending;
+            if (blk > 0) {
+                sendFormated("AT+USORF=%d,%d\r\n",_sockets[socket].handle, blk);
+                USORFparam param;
+                param.buf = buf;
+                if (RESP_OK == waitFinalResp(_cbUSORF, &param)) {
+                    _sockets[socket].pending -= blk;
+                    *ip = param.ip;
+                    *port = param.port;
+                    len -= blk;
+                    cnt += blk;
+                    buf += blk;
+                    len = 0; // done 
+                    ok = true;
+                }
+            } else if (!TIMEOUT(timer, _sockets[socket].timeout_ms)) {
+                ok = (WAIT == waitFinalResp(NULL,NULL,0)); // wait for URCs
+            } else {
+                len = 0; // no more data and socket closed or timed-out
+                ok = true;
+            }
+        }
+        UNLOCK();
+        if (!ok)
+            return SOCKET_ERROR;
+    }
+    timer.stop();
+    timer.reset();
+    return cnt;
+}
+
+int MDMParser::_findSocket(int handle) {
+    for (int socket = 0; socket < NUMSOCKETS; socket ++) {
+        if (_sockets[socket].handle == handle)
+            return socket;
+    }
+    return SOCKET_ERROR;
+}
+
+// ----------------------------------------------------------------
+
+int MDMParser::_cbCMGL(int type, const char* buf, int len, CMGLparam* param)
+{ 
+    if ((type == TYPE_PLUS) && param && param->num) {
+        // +CMGL: <ix>,...
+        int ix;
+        if (sscanf(buf, "\r\n+CMGL: %d,", &ix) == 1)
+        {
+            *param->ix++ = ix;
+            param->num--;
+        }
+    }
+    return WAIT;
+}
+
+int MDMParser::smsList(const char* stat /*= "ALL"*/, int* ix /*=NULL*/, int num /*= 0*/) {
+    int ret = -1;
+    LOCK();
+    sendFormated("AT+CMGL=\"%s\"\r\n", stat);
+    CMGLparam param;
+    param.ix = ix;
+    param.num = num;
+    if (RESP_OK == waitFinalResp(_cbCMGL, &param))
+        ret = num - param.num;
+    UNLOCK();
+    return ret;
+}
+
+bool MDMParser::smsSend(const char* num, const char* buf)
+{
+    bool ok = false;
+    LOCK();
+    sendFormated("AT+CMGS=\"%s\"\r\n",num);
+    if (RESP_PROMPT == waitFinalResp(NULL,NULL,150*1000)) {
+        send(buf, strlen(buf));
+        const char ctrlZ = 0x1A;
+        send(&ctrlZ, sizeof(ctrlZ));
+        ok = (RESP_OK == waitFinalResp());
+    }
+    UNLOCK();
+    return ok;
+}
+
+bool MDMParser::smsDelete(int ix)
+{
+    bool ok = false;
+    LOCK();
+    sendFormated("AT+CMGD=%d\r\n",ix);
+    ok = (RESP_OK == waitFinalResp());
+    UNLOCK();
+    return ok;
+}
+
+int MDMParser::_cbCMGR(int type, const char* buf, int len, CMGRparam* param)
+{
+    if (param) {
+        if (type == TYPE_PLUS) {
+            if (sscanf(buf, "\r\n+CMGR: \"%*[^\"]\",\"%[^\"]", param->num) == 1) {
+            }
+        } else if ((type == TYPE_UNKNOWN) && (buf[len-2] == '\r') && (buf[len-1] == '\n')) {
+            memcpy(param->buf, buf, len-2);
+            param->buf[len-2] = '\0';
+        }
+    }
+    return WAIT;
+}
+
+bool MDMParser::smsRead(int ix, char* num, char* buf, int len)
+{
+    bool ok = false;
+    LOCK();
+    CMGRparam param;
+    param.num = num;
+    param.buf = buf;
+    sendFormated("AT+CMGR=%d\r\n",ix);
+    ok = (RESP_OK == waitFinalResp(_cbCMGR, &param));
+    UNLOCK();
+    return ok;
+}
+   
+// ----------------------------------------------------------------
+  
+int MDMParser::_cbCUSD(int type, const char* buf, int len, char* resp)
+{
+    if ((type == TYPE_PLUS) && resp) {
+        // +USD: \"%*[^\"]\",\"%[^\"]\",,\"%*[^\"]\",%d,%d,%d,%d,\"*[^\"]\",%d,%d"..);
+        if (sscanf(buf, "\r\n+CUSD: %*d,\"%[^\"]\",%*d", resp) == 1) {
+            /*nothing*/            
+        }
+    }
+    return WAIT;
+}  
+
+bool MDMParser::ussdCommand(const char* cmd, char* buf)
+{
+    bool ok = false;
+    LOCK();
+    *buf = '\0';
+    if (_dev.dev != DEV_LISA_C200) {
+        sendFormated("AT+CUSD=1,\"%s\"\r\n",cmd);
+        ok = (RESP_OK == waitFinalResp(_cbCUSD, buf));
+    }
+    UNLOCK();
+    return ok;
+}
+
+// ----------------------------------------------------------------
+   
+bool MDMParser::delFile(const char* filename)
+{
+    bool ok = false;
+    LOCK();
+    sendFormated("AT+UDELFILE=\"%s\"\r\n", filename);
+    ok = (RESP_OK == waitFinalResp());
+    UNLOCK();
+    return ok;
+}
+
+int MDMParser::writeFile(const char* filename, const char* buf, int len)
+{
+    bool ok = false;
+    LOCK();
+    sendFormated("AT+UDWNFILE=\"%s\",%d\r\n", filename, len);
+    if (RESP_PROMPT == waitFinalResp()) {
+        send(buf, len);
+        ok = (RESP_OK == waitFinalResp());
+    }
+    UNLOCK();
+    return ok ? len : -1;
+}
+
+int MDMParser::readFile(const char* filename, char* buf, int len)
+{
+    URDFILEparam param;
+    param.filename = filename;
+    param.buf = buf; 
+    param.sz = len; 
+    param.len = 0;
+    LOCK();
+    sendFormated("AT+URDFILE=\"%s\"\r\n", filename, len);
+    if (RESP_OK != waitFinalResp(_cbURDFILE, &param))
+        param.len = -1;
+    UNLOCK();
+    return param.len;
+}
+
+int MDMParser::_cbURDFILE(int type, const char* buf, int len, URDFILEparam* param)
+{
+    if ((type == TYPE_PLUS) && param && param->filename && param->buf) {
+        char filename[48];
+        int sz;
+        if ((sscanf(buf, "\r\n+URDFILE: \"%[^\"]\",%d,", filename, &sz) == 2) && 
+            (0 == strcmp(param->filename, filename)) &&
+            (buf[len-sz-2] == '\"') && (buf[len-1] == '\"')) {
+            param->len = (sz < param->sz) ? sz : param->sz;
+            memcpy(param->buf, &buf[len-1-sz], param->len);
+        }
+    }
+    return WAIT;
+}
+  
+// ----------------------------------------------------------------
+bool MDMParser::setDebug(int level) 
+{
+#ifdef MDM_DEBUG
+    if ((_debugLevel >= 0) && (level >= 0)) {
+        _debugLevel = level;
+        return true;
+    }
+#endif
+    return false;
+}
+
+void MDMParser::dumpDevStatus(MDMParser::DevStatus* status, 
+            _DPRINT dprint, void* param) 
+{
+    dprint(param, "Modem::devStatus\r\n");
+    const char* txtDev[] = { "Unknown", "SARA-G350", "LISA-U200", "LISA-C200", "SARA-U260", "SARA-U270", "LEON-G200" };
+    if (status->dev < sizeof(txtDev)/sizeof(*txtDev) && (status->dev != DEV_UNKNOWN))
+        dprint(param, "  Device:       %s\r\n", txtDev[status->dev]);
+    const char* txtLpm[] = { "Disabled", "Enabled", "Active" };
+    if (status->lpm < sizeof(txtLpm)/sizeof(*txtLpm))
+        dprint(param, "  Power Save:   %s\r\n", txtLpm[status->lpm]);
+    const char* txtSim[] = { "Unknown", "Missing", "Pin", "Ready" };
+    if (status->sim < sizeof(txtSim)/sizeof(*txtSim) && (status->sim != SIM_UNKNOWN))
+        dprint(param, "  SIM:          %s\r\n", txtSim[status->sim]);
+    if (*status->ccid)  
+        dprint(param, "  CCID:         %s\r\n", status->ccid);
+    if (*status->imei) 
+        dprint(param, "  IMEI:         %s\r\n", status->imei);
+    if (*status->imsi)  
+        dprint(param, "  IMSI:         %s\r\n", status->imsi);
+    if (*status->meid) 
+        dprint(param, "  MEID:         %s\r\n", status->meid); // LISA-C
+    if (*status->manu) 
+        dprint(param, "  Manufacturer: %s\r\n", status->manu);
+    if (*status->model)  
+        dprint(param, "  Model:        %s\r\n", status->model);
+    if (*status->ver)  
+        dprint(param, "  Version:      %s\r\n", status->ver);
+}
+
+void MDMParser::dumpNetStatus(MDMParser::NetStatus *status,
+            _DPRINT dprint, void* param)
+{
+    dprint(param, "Modem::netStatus\r\n");
+    const char* txtReg[] = { "Unknown", "Denied", "None", "Home", "Roaming" };
+    if (status->csd < sizeof(txtReg)/sizeof(*txtReg) && (status->csd != REG_UNKNOWN))
+        dprint(param, "  CSD Registration:   %s\r\n", txtReg[status->csd]);
+    if (status->psd < sizeof(txtReg)/sizeof(*txtReg) && (status->psd != REG_UNKNOWN))
+        dprint(param, "  PSD Registration:   %s\r\n", txtReg[status->psd]);
+    const char* txtAct[] = { "Unknown", "GSM", "Edge", "3G", "CDMA" };
+    if (status->act < sizeof(txtAct)/sizeof(*txtAct) && (status->act != ACT_UNKNOWN))
+        dprint(param, "  Access Technology:  %s\r\n", txtAct[status->act]);
+    if (status->rssi) 
+        dprint(param, "  Signal Strength:    %d dBm\r\n", status->rssi);
+    if (status->ber) 
+        dprint(param, "  Bit Error Rate:     %d\r\n", status->ber);
+    if (*status->opr)  
+        dprint(param, "  Operator:           %s\r\n", status->opr);
+    if (status->lac != 0xFFFF)  
+        dprint(param, "  Location Area Code: %04X\r\n", status->lac);
+    if (status->ci != 0xFFFFFFFF)  
+        dprint(param, "  Cell ID:            %08X\r\n", status->ci);
+    if (*status->num)  
+        dprint(param, "  Phone Number:       %s\r\n", status->num);
+}
+
+void MDMParser::dumpIp(MDMParser::IP ip,
+            _DPRINT dprint, void* param) 
+{
+    if (ip != NOIP)
+        dprint(param, "Modem:IP " IPSTR "\r\n", IPNUM(ip));
+}
+    
+// ----------------------------------------------------------------
+int MDMParser::_parseMatch(Pipe<char>* pipe, int len, const char* sta, const char* end)
+{
+    int o = 0;
+    if (sta) {
+        while (*sta) {
+            if (++o > len)                  return WAIT;
+            char ch = pipe->next();
+            if (*sta++ != ch)               return NOT_FOUND;
+        }
+    }
+    if (!end)                               return o; // no termination
+    // at least any char
+    if (++o > len)                      return WAIT;
+    pipe->next();
+    // check the end     
+    int x = 0;
+    while (end[x]) {
+        if (++o > len)                      return WAIT;
+        char ch = pipe->next();
+        x = (end[x] == ch) ? x + 1 : 
+            (end[0] == ch) ? 1 : 
+                            0;
+    }
+    return o;
+}
+
+int MDMParser::_parseFormated(Pipe<char>* pipe, int len, const char* fmt)
+{
+    int o = 0;
+    int num = 0;
+    if (fmt) {
+        while (*fmt) {
+            if (++o > len)                  return WAIT;
+            char ch = pipe->next();
+            if (*fmt == '%') {
+                fmt++;
+                if (*fmt == 'd') { // numeric
+                    fmt ++;
+                    num = 0;
+                    while (ch >= '0' && ch <= '9') {
+                        num = num * 10 + (ch - '0'); 
+                        if (++o > len)      return WAIT;
+                        ch = pipe->next();
+                    }
+                }   
+                else if (*fmt == 'c') { // char buffer (takes last numeric as length)
+                    fmt ++;
+                    while (num --) {
+                        if (++o > len)      return WAIT;
+                        ch = pipe->next();
+                    }   
+                }
+                else if (*fmt == 's') {
+                    fmt ++;
+                    if (ch != '\"')         return NOT_FOUND;
+                    do {
+                        if (++o > len)      return WAIT;
+                        ch = pipe->next();
+                    } while (ch != '\"');
+                    if (++o > len)          return WAIT;
+                    ch = pipe->next();
+                }
+            }
+            if (*fmt++ != ch)               return NOT_FOUND;
+        }
+    }
+    return o; 
+}
+
+int MDMParser::_getLine(Pipe<char>* pipe, char* buf, int len)
+{
+    int unkn = 0;
+    int sz = pipe->size();
+    int fr = pipe->free();
+    if (len > sz)
+        len = sz;
+    while (len > 0)
+    {
+        static struct { 
+              const char* fmt;                              int type; 
+        } lutF[] = {
+            { "\r\n+USORD: %d,%d,\"%c\"",                   TYPE_PLUS       },
+            { "\r\n+USORF: %d,\"" IPSTR "\",%d,%d,\"%c\"",  TYPE_PLUS       },
+            { "\r\n+URDFILE: %s,%d,\"%c\"",                 TYPE_PLUS       },
+        };
+        static struct { 
+              const char* sta;          const char* end;    int type; 
+        } lut[] = {
+            { "\r\nOK\r\n",             NULL,               TYPE_OK         },
+            { "\r\nERROR\r\n",          NULL,               TYPE_ERROR      },
+            { "\r\n+CME ERROR:",        "\r\n",             TYPE_ERROR      }, 
+            { "\r\n+CMS ERROR:",        "\r\n",             TYPE_ERROR      },
+            { "\r\nRING\r\n",           NULL,               TYPE_RING       },
+            { "\r\nCONNECT\r\n",        NULL,               TYPE_CONNECT    },
+            { "\r\nNO CARRIER\r\n",     NULL,               TYPE_NOCARRIER  },
+            { "\r\nNO DIALTONE\r\n",    NULL,               TYPE_NODIALTONE },
+            { "\r\nBUSY\r\n",           NULL,               TYPE_BUSY       },
+            { "\r\nNO ANSWER\r\n",      NULL,               TYPE_NOANSWER   },
+            { "\r\n+",                  "\r\n",             TYPE_PLUS       },
+            { "\r\n@",                  NULL,               TYPE_PROMPT     }, // Sockets
+            { "\r\n>",                  NULL,               TYPE_PROMPT     }, // SMS
+            { "\n>",                    NULL,               TYPE_PROMPT     }, // File
+        };
+        for (int i = 0; i < sizeof(lutF)/sizeof(*lutF); i ++) {
+            pipe->set(unkn);
+            int ln = _parseFormated(pipe, len, lutF[i].fmt);
+            if (ln == WAIT && fr)                       
+                return WAIT;
+            if ((ln != NOT_FOUND) && (unkn > 0))  
+                return TYPE_UNKNOWN | pipe->get(buf, unkn);
+            if (ln > 0)
+                return lutF[i].type  | pipe->get(buf, ln);
+        }
+        for (int i = 0; i < sizeof(lut)/sizeof(*lut); i ++) {
+            pipe->set(unkn);
+            int ln = _parseMatch(pipe, len, lut[i].sta, lut[i].end);
+            if (ln == WAIT && fr)                       
+                return WAIT;
+            if ((ln != NOT_FOUND) && (unkn > 0))  
+                return TYPE_UNKNOWN | pipe->get(buf, unkn);
+            if (ln > 0)
+                return lut[i].type | pipe->get(buf, ln);
+        }
+        // UNKNOWN
+        unkn ++;
+        len--;
+    }
+    return WAIT;
+}
+
+// ----------------------------------------------------------------
+// Serial Implementation 
+// ----------------------------------------------------------------
+
+/*! Helper Dev Null Device 
+    Small helper class used to shut off stderr/stdout. Sometimes stdin/stdout
+    is shared with the serial port of the modem. Having printfs inbetween the 
+    AT commands you cause a failure of the modem.
+*/
+class DevNull : public Stream {
+public: 
+    DevNull() : Stream(_name+1) { }             //!< Constructor
+    void claim(const char* mode, FILE* file) 
+        { freopen(_name, mode, file); }         //!< claim a stream
+protected:
+    virtual int _getc()         { return EOF; } //!< Nothing
+    virtual int _putc(int c)    { return c; }   //!< Discard
+    static const char* _name;                   //!< File name
+};
+const char* DevNull::_name = "/null";  //!< the null device name
+static      DevNull null;              //!< the null device
+MDMSerial* MDMSerial::mdmInst;
+
+MDMSerial::MDMSerial(PinName tx /*= MDMTXD*/, PinName rx /*= MDMRXD*/, 
+            int baudrate /*= MDMBAUD*/,
+#if DEVICE_SERIAL_FC
+            PinName rts /*= MDMRTS*/, PinName cts /*= MDMCTS*/, 
+#endif
+            int rxSize /*= 256*/, int txSize /*= 128*/) : 
+            SerialPipe(tx, rx, rxSize, txSize) 
+{   mdmInst=this;
+    if (rx == USBRX) 
+        null.claim("r", stdin);
+    if (tx == USBTX) {
+        null.claim("w", stdout);
+        null.claim("w", stderr);
+#ifdef MDM_DEBUG
+        _debugLevel = -1;
+#endif
+    }
+#ifdef TARGET_UBLOX_C027
+    _onboard = (tx == MDMTXD) && (rx == MDMRXD);
+    if (_onboard)
+       c027_mdm_powerOn(false);
+#endif
+    baud(baudrate);
+#if DEVICE_SERIAL_FC
+    if ((rts != NC) || (cts != NC))
+    {
+        Flow flow = (cts == NC) ? RTS :
+                    (rts == NC) ? CTS : RTSCTS ;
+        set_flow_control(flow, rts, cts);
+        if (cts != NC) _dev.lpm = LPM_ENABLED;
+    }
+#endif
+}
+
+MDMSerial::~MDMSerial(void)
+{
+    powerOff();
+#ifdef TARGET_UBLOX_C027
+    if (_onboard)
+        c027_mdm_powerOff();
+#endif
+}
+
+int MDMSerial::_send(const void* buf, int len)   
+{ 
+    return put((const char*)buf, len, true/*=blocking*/);
+}
+
+int MDMSerial::getLine(char* buffer, int length)
+{
+    return _getLine(&_pipeRx, buffer, length);
+}
+
+// ----------------------------------------------------------------
+// USB Implementation 
+// ----------------------------------------------------------------
+
+#ifdef HAVE_MDMUSB
+MDMUsb::MDMUsb(void)                             
+{ 
+#ifdef MDM_DEBUG
+    _debugLevel = 1;
+#endif    
+#ifdef TARGET_UBLOX_C027
+    _onboard = true;
+    c027_mdm_powerOn(true);
+#endif
+}
+
+MDMUsb::~MDMUsb(void)
+{
+    powerOff();
+#ifdef TARGET_UBLOX_C027
+    if (_onboard)
+        c027_mdm_powerOff();
+#endif
+}
+
+int MDMUsb::_send(const void* buf, int len)      { return 0; }
+
+int MDMUsb::getLine(char* buffer, int length)    { return NOT_FOUND; }
+
+#endif