Serial cannot be detected, so alert SMS were never sent.

src/Core.cpp

@@ -88,16 +88,11 @@ namespace core {
 				details::appendToSmsBuffer(buffer, PSTR("\n- RTC was stopped.%S"), backupFailureString);
 			}
 
-#if ALERTS_ON_SERIAL_IF_AVAILABLE
-			if(Serial) {
-				NOTICE_FORMAT("notifyFailure", "%s", buffer);
-				notified = true;
-			}
-			else {
-#endif
+#if ALERTS_ON_SERIAL
+			NOTICE_FORMAT("notifyFailure", "%s", buffer);
+			notified = true;
+#else
 			notified = network::sendSms(buffer);
-#if ALERTS_ON_SERIAL_IF_AVAILABLE
-			}
 #endif
 			if (!notified) NOTICE_MSG("notifyFailure", "SMS not sent !");
 		}

src/config/Alerts.h

@@ -18,15 +18,16 @@
 
 
 /**
- \def ALERTS_ON_SERIAL_IF_AVAILABLE
+ \def ALERTS_ON_SERIAL
  Display alerts on serial when connected rather than sending an SMS.
  Useful for debugging purpose and avoid costs related to SMS sending.
 */
-#define ALERTS_ON_SERIAL_IF_AVAILABLE					1
+#define ALERTS_ON_SERIAL _DEBUG
+
 /**
  \def ALERT_SUSPICIOUS_RTC_TEMPERATURE
  Temperature at which to consider the RTC module as failling.
  When the backup battery is dead or nearly dead, the reading
  of the temperature fails and returns 0.
 */
-#define ALERT_SUSPICIOUS_RTC_TEMPERATURE				0
+#define ALERT_SUSPICIOUS_RTC_TEMPERATURE	0