add callWireBegin for rtclib workaround

Author: thijstriemstra

DS3231_RealtimeClock/DS3231_RealtimeClock.cpp

@@ -17,12 +17,16 @@ DS3231_RealtimeClock::DS3231_RealtimeClock(int scl_pin, int sda_pin, uint8_t eep
   _rtc = new RTC_DS3231();
 }
 
-void DS3231_RealtimeClock::begin() {
+void DS3231_RealtimeClock::begin(bool callWireBegin) {
   // rtc
-  Wire.begin(_sdaPin, _sclPin);
-  Wire.beginTransmission(DS3231_ADDRESS);
-  if (Wire.endTransmission() != 0) {
-    Log.warning(F("Initializing DS3231... Error!" CR));
+  if (callWireBegin) {
+    Wire.begin(_sdaPin, _sclPin);
+    Wire.beginTransmission(DS3231_ADDRESS);
+    if (Wire.endTransmission() != 0) {
+      Log.warning(F("Initializing DS3231... Error!" CR));
+    }
+  } else {
+    _rtc->begin(&Wire);
   }
 
   if (_rtc->lostPower()) {

DS3231_RealtimeClock/DS3231_RealtimeClock.h

@@ -19,7 +19,7 @@ class DS3231_RealtimeClock
 {
   public:
     DS3231_RealtimeClock(int scl_pin = -1, int sda_pin = -1, uint8_t eeprom_address = 0x57);
-    void begin();
+    void begin(bool callWireBegin = true);
     DateTime now();
     DateTime load(int address = 0);
     void save(DateTime timestamp, int address = 0);

SystemClock/SystemClock.cpp

@@ -22,7 +22,7 @@ SystemClock::SystemClock(
 }
 
 void SystemClock::begin() {
-  _clock->begin();
+  _clock->begin(false);
 
   startupTime = _clock->startupTime;
 }