Add parsed network time

Signed-off-by: Sara Damiano <sdamiano@stroudcenter.org>

src/TinyGsmTime.tpp

@@ -24,6 +24,10 @@ class TinyGsmTime {
   String getGSMDateTime(TinyGSMDateTimeFormat format) {
     return thisModem().getGSMDateTimeImpl(format);
   }
+  bool getNetworkTime(int* year, int* month, int* day, int* hour, int* minute,
+                      int* second, float* timezone) {
+    return thisModem().getNetworkTimeImpl(year, month, day, hour, minute, second, timezone);
+  }
 
   /*
    * CRTP Helper
@@ -56,6 +60,49 @@ class TinyGsmTime {
     }
     return res;
   }
+
+  bool getNetworkTimeImpl(int* year, int* month, int* day, int* hour, int* minute,
+                      int* second, float* timezone) {
+    thisModem().sendAT(GF("+CCLK?"));
+    if (thisModem().waitResponse(2000L, GF("+CCLK: \"")) != 1) {
+      return false;
+    }
+
+    int iyear = 0;
+    int imonth = 0;
+    int iday = 0;
+    int ihour = 0;
+    int imin = 0;
+    int isec = 0;
+    int itimezone = 0;
+
+    // Date & Time
+    iyear = thisModem().streamGetIntBefore('/');
+    imonth = thisModem().streamGetIntBefore('/');
+    iday = thisModem().streamGetIntBefore(',');
+    ihour = thisModem().streamGetIntBefore(':');
+    imin = thisModem().streamGetIntBefore(':');
+    isec = thisModem().streamGetIntLength(2);
+    char tzSign = thisModem().stream.read();
+    itimezone = thisModem().streamGetIntBefore('\n');
+    if (strcmp(tzSign, '-') == 0) {
+      itimezone = itimezone * -1;
+    }
+
+    // Set pointers
+    if (iyear < 2000) iyear += 2000;
+    if (year != NULL) *year = iyear;
+    if (month != NULL) *month = imonth;
+    if (day != NULL) *day = iday;
+    if (hour != NULL) *hour = ihour;
+    if (minute != NULL) *minute = imin;
+    if (second != NULL) *second = isec;
+    if (timezone != NULL) *timezone = static_cast<float>(itimezone)/ 4.0;
+
+    // Final OK
+    thisModem().waitResponse();
+    return true;
+    }
 };
 
 #endif  // SRC_TINYGSMTIME_H_