Add files via upload

GPS_RTC_Clock.h

@@ -0,0 +1,58 @@
+/*
+  GPS_RTC_Clock.h
+
+  MIT License
+  Copyright (c) 2023 hdrlux
+
+  main local Lib with Clock control, creating 'long term ±0.1 sec accurate Arduino clock'
+
+  tested hardware:
+  -Arduino Nano 5V ATmega328P 
+  -see local *.h files for other hardware
+
+  main functions:
+  - Sync RTC with GPS in UTC using interrupt
+  - LED blinking in sync with GPS PPS, to check accuracy
+  - LED ON if RTC synced in last hours
+  - Convert to Local Date/Time
+  - Setting flag for printing new time to display, using interrupt
+*/
+
+/***** Notice *******************************************
+  !! GPS & USB use the same serial port !!              
+  you will have to disconnect the Arduino RX pin 0 from  
+  the GPS TX pin, to upload a new sketch over USB       
+  ->remove GPS PCB or Nano PCB from main PCB/breadboard 
+********************************************************/
+
+#ifndef GPS_RTC_Clock_H
+#define GPS_RTC_Clock_H
+
+#include "ISOWeekNumber.h"  // pass to main ino
+#include "Local_names.h"    // pass to main ino
+#include "RTC_com.h"
+
+extern bool NewSec;   // pass to main ino = second ready to print
+extern bool NewMin;   // pass to main ino = minute ready to print
+extern bool NewHour;  // pass to main ino = Hour ready to print
+extern time_t Loc_t;  // pass to main ino = Local timestamp
+
+// call from main ino, GPS_RTC_Clock.h
+void GPS_RTC_Clock_setup();
+
+// call from main ino, GPS_RTC_Clock.h
+void GPS_RTC_Clock_loop();
+
+// process sec from RTC
+void Sec_Flip(time_t t);
+
+// do something on reboot & the flip of the RTC minute [timezone independent]
+void MinFlip();
+
+// do something every 5 minutes
+void Min5Flip();
+
+// do something every hour, on the hour
+void HourFlip();
+
+#endif  // GPS_RTC_Clock_H