Add String cast operator or RTCTime

Former-commit-id: 74ef07c

Author: sebromero

libraries/RTC/src/RTC.h

@@ -114,6 +114,14 @@ class RTCTime {
      * @return String The date and time in the format YYYY-MM-DDTHH:MM:SS.
      */
     arduino::String toString() const;  
+    
+    /**
+     * @brief Returns the ISO 8601 string representation of the date and time
+     * by calling the toString() method.
+     * @return String The date and time in the format YYYY-MM-DDTHH:MM:SS.
+     */
+    operator arduino::String() const;
+};
 
 enum class Period {
     ONCE_EVERY_2_SEC,

libraries/RTC/src/RTClock.cpp

@@ -403,6 +403,10 @@ arduino::String RTCTime::toString() const {
     return formattedTime;
 }
 
+RTCTime::operator String() const{
+    return toString();
+}
+
 /* -------------------------------------------------------------------------- */
 /*                             RTClass                                        */
 /* -------------------------------------------------------------------------- */