Make sync interval configurable

Author: pennam

src/utility/time/TimeService.cpp

@@ -24,6 +24,7 @@
 #include <time.h>
 #include "TimeService.h"
 #include "NTPUtils.h"
+#include "AIoTC_Const.h"
 
 #ifdef ARDUINO_ARCH_SAMD
   #include <RTCZero.h>
@@ -90,8 +91,7 @@ unsigned long esp8266_getRTC();
  **************************************************************************************/
 
 /* Default NTP synch is scheduled each 24 hours from startup */
-static unsigned long const AIOT_TIMESERVICE_NTP_SYNC_TIMEOUT_ms = 86400000;
-
+static time_t const TIMESERVICE_NTP_SYNC_TIMEOUT_ms = DAYS * 1000;
 static time_t const EPOCH_AT_COMPILE_TIME = cvt_time(__DATE__);
 static time_t const EPOCH = 0;
 
@@ -106,6 +106,7 @@ TimeService::TimeService()
 , _timezone_offset(0)
 , _timezone_dst_until(0)
 , _last_ntp_sync_tick(0)
+, _ntp_sync_interval_ms(TIMESERVICE_NTP_SYNC_TIMEOUT_ms)
 {
 
 }
@@ -124,7 +125,7 @@ unsigned long TimeService::getTime()
 {
   /* Check if it's time to sync */
   unsigned long const current_tick = millis();
-  bool const is_ntp_sync_timeout = (current_tick - _last_ntp_sync_tick) > AIOT_TIMESERVICE_NTP_SYNC_TIMEOUT_ms;
+  bool const is_ntp_sync_timeout = (current_tick - _last_ntp_sync_tick) > _ntp_sync_interval_ms;
   if(!_is_rtc_configured || is_ntp_sync_timeout) {
     sync();
   }
@@ -148,6 +149,11 @@ bool TimeService::sync()
   return _is_rtc_configured;
 }
 
+void TimeService::setSyncInterval(unsigned long seconds)
+{
+  _ntp_sync_interval_ms = seconds * 1000;
+}
+
 void TimeService::setTimeZoneData(long offset, unsigned long dst_until)
 {
   if(_timezone_offset != offset)

src/utility/time/TimeService.h

@@ -40,6 +40,8 @@ class TimeService
   unsigned long getLocalTime();
   void          setTimeZoneData(long offset, unsigned long valid_until);
   bool          sync();
+  void          setSyncInterval(unsigned long seconds);
+
   /* Helper function to convert an input String into a UNIX timestamp.
    * The input String format must be as follow "2021 Nov 01 17:00:00"
    */
@@ -53,6 +55,7 @@ class TimeService
   long _timezone_offset;
   unsigned long _timezone_dst_until;
   unsigned long _last_ntp_sync_tick;
+  unsigned long _ntp_sync_interval_ms;
 
   unsigned long getRemoteTime();
   bool connected();