v0.55 add RTC timestamp bias correction

dclock.ino

@@ -1,4 +1,4 @@
-// Erisian digital clock - v0.5
+// Digital erisian clock - v0.55
 #include <Arduino.h>
 #include <TimeLib.h>
 #include <Thread.h>
@@ -9,6 +9,7 @@ const byte PIN_DIO = 3;                // DisplaySetting // DIO pin
 const byte buttonPin = 4;              // ButtonSetting // Button pin (a 10K resistor is necessary)
 SevenSegmentExtended display(PIN_CLK, PIN_DIO); // DisplaySetting
 Thread mainThread = Thread();          // mainThread
+Thread correctionThread = Thread();    // Time bias correction thread
 long buttonPressed = 0;                // Button press time counter
 long previousButtonMillis = 0;         // Time of last button press
 byte viewMode = 0;                     // View mode after pressing button
@@ -18,22 +19,25 @@ int mainCheck = 108;                   // The main interval is an eighth of a de
 byte octavo = 0;                       // Eight-count counter
 byte colon = 0;                        // Colon status
 float erisiansec;                      // Erisian second
-
 // Custom settings:
 int brightnessPercent = 32;            // Display brightness percentage value
-long timezoneOffset = (-28800);        // Erisian timezoneOffset. Formula for calculating:
+long timezoneOffset = (-28800);        // Erisian timezoneOffset. Formula for calculating: ((-5 christian chours) - (GMT hours))
-                                       // ((-5 christian chours) - (GMT hours))
                                        // Examples:
                                        // GMT+3: ( (-5)-(+3) )*60*60 = -28800
                                        // GMT-0:  ( (-5)-(0) )*60*60 = -18000
                                        // GMT-3: ( (-5)-(-3) )*60*60 = -7200
                                        // GMT-5: ( (-5)-(-5) )*60*60 = 0
                                        // GMT-7: ( (-5)-(-7) )*60*60 = 7200
-                                       // The beginning of Discordian day (0 hours, 0 minutes,
+                                       // The beginning of Discordian day (0 hours, 0 minutes, 0 seconds) coincides
-                                       // 0 seconds) coincides with the beginning of Christian
+                                       // with the beginning of Christian day on Easter Island on winter time (GMT-5).
-                                       // day on Easter Island on winter time (GMT-5).
                                        // Details: https://discordia.fandom.com/wiki/Erisian_Time
 
+// Time bias correction variables:
+int correctionBias = 11;               // Daily clock correction in seconds
+long correctionCheck = 300000;
+byte correctionHour = 3;
+bool correctionReady = true;
+
 void setup() {
   Serial.begin(9600);                  // Initializes the Serial connection @ 9600 baud for debug
   display.begin();                     // Display setting, initializes the display
@@ -44,19 +48,25 @@ void setup() {
     Serial.println("Unable to sync with the RTC");
     display.print("_time_not_set_");   // Shows warning "time not set"
   } else {
-    Serial.println("RTC has set the system time");
+//    Serial.println("RTC has set the system time");
+    Serial.println(now());
     display.print("HAIL_EriS");        // Shows display initialization
   }
   pinMode(buttonPin, INPUT);           // Button setting
-  // Main thread initialization:
+  // Main thread thread initialization:
   mainThread.onRun(mainLoop);
   mainThread.setInterval(mainCheck);
+  // Time bias correction thread initialization:
+  correctionThread.onRun(correctionLoop);
+  correctionThread.setInterval(correctionCheck);
 }
 
 void loop() {
-  // Main thread:
+  // Threads:
   if (mainThread.shouldRun())
     mainThread.run();
+  if (correctionThread.shouldRun())
+    correctionThread.run();
   // Time check:
   if (timeStatus() != timeSet)
     display.print("SEt tiMe");
@@ -159,16 +169,16 @@ void ddate() {
   display.setColonOn(0);
   if (viewMode == 2) {
     if (m == 1 || m == 2) {
-      daynumber = days[(m - 1)] + d;   // for any type of year, it calculate the number of days for January or February
+      daynumber = days[(m - 1)] + d;         // for any type of year, it calculate the number of days for January or February
       dday = daynumber;
       dseason = 0;
-    }                                  // Now, try to calculate for the other months
+    }                                    // Now, try to calculate for the other months
     else if ((y % 4 == 0 && y % 100 != 0) || y % 400 == 0) { //those are the conditions to have a leap year
-      daynumber = days[(m - 1)] + d + 1; // if leap year, calculate in the same way but increasing one day
+      daynumber = days[(m - 1)] + d + 1;       // if leap year, calculate in the same way but increasing one day
       dday = (daynumber % 73) - 1;
       dseason = (daynumber - 1) / 73;
     }
-    else {                             // if not a leap year, calculate in the normal way, such as January or February
+    else {                               // if not a leap year, calculate in the normal way, such as January or February
       daynumber = days[(m - 1)] + d;
       dday = daynumber % 73;
       dseason = daynumber / 73;
@@ -218,3 +228,22 @@ void longPress() {
   display.print("HAIL_EriS");
   viewMode = 0;
 }
+
+void correctionLoop() {
+  if (hour() == correctionHour) {
+    if (correctionReady) {
+      // CORRECTION!
+      tmElements_t RTCtime;
+      RTC.read(RTCtime);
+      time_t RTCtimestamp;
+      RTCtimestamp = makeTime(RTCtime);
+      tmElements_t timeNew;
+      time_t newTimestamp = RTCtimestamp - correctionBias;
+      breakTime(newTimestamp, timeNew);
+      RTC.write(timeNew);
+      setSyncProvider(RTC.get);
+      // CORRECTION!
+      correctionReady = false;
+    }
+  } else correctionReady = true;
+}