v2.0.0

Temporary fix 2K38 bug #10
#12

Author: fbiego

ESP32Time.cpp

@@ -36,7 +36,7 @@ ESP32Time::ESP32Time(){}
 	@param  offest
             gmt offset in seconds
 */
-ESP32Time::ESP32Time(long offset){
+ESP32Time::ESP32Time(unsigned long offset){
 	this->offset = offset;
 }
 
@@ -88,9 +88,14 @@ void ESP32Time::setTimeStruct(tm t) {
     @param  ms
             microseconds (optional)
 */
-void ESP32Time::setTime(long epoch, int ms) {
+void ESP32Time::setTime(unsigned long epoch, int ms) {
   struct timeval tv;
-  tv.tv_sec = epoch;  // epoch time (seconds)
+  if (epoch > 2082758399){
+	  this->overflow = true;
+	  tv.tv_sec = epoch - 2082758399;  // epoch time (seconds)
+  } else {
+	  tv.tv_sec = epoch;  // epoch time (seconds)
+  }
   tv.tv_usec = ms;    // microseconds
   settimeofday(&tv, NULL);
 }
@@ -100,10 +105,19 @@ void ESP32Time::setTime(long epoch, int ms) {
 */
 tm ESP32Time::getTimeStruct(){
   struct tm timeinfo;
-  getLocalTime(&timeinfo);
+  time_t now;
+  time(&now);
+  localtime_r(&now, &timeinfo);
   time_t tt = mktime (&timeinfo);
-  tt = tt + offset;
-  struct tm * tn = localtime(&tt);;
+    
+  if (this->overflow){
+	  tt += 63071999;
+  }
+  tt += offset;
+  struct tm * tn = localtime(&tt);
+  if (this->overflow){
+	  tn->tm_year += 64;
+  }
   return *tn;
 }
 
@@ -193,38 +207,42 @@ String ESP32Time::getDate(bool mode){
 }
 
 /*!
-    @brief  get the current milliseconds as long
+    @brief  get the current milliseconds as unsigned long
 */
-long ESP32Time::getMillis(){
+unsigned long ESP32Time::getMillis(){
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 	return tv.tv_usec/1000;
 }
 
 /*!
-    @brief  get the current microseconds as long
+    @brief  get the current microseconds as unsigned long
 */
-long ESP32Time::getMicros(){
+unsigned long ESP32Time::getMicros(){
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 	return tv.tv_usec;
 }
 
 /*!
-    @brief  get the current epoch seconds as long
+    @brief  get the current epoch seconds as unsigned long
 */
-long ESP32Time::getEpoch(){
+unsigned long ESP32Time::getEpoch(){
 	struct tm timeinfo = getTimeStruct();
 	return mktime(&timeinfo);
 }
 
 /*!
-    @brief  get the current epoch seconds as long from the rtc without offset
+    @brief  get the current epoch seconds as unsigned long from the rtc without offset
 */
-long ESP32Time::getLocalEpoch(){
+unsigned long ESP32Time::getLocalEpoch(){
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
-	return tv.tv_sec;
+	unsigned long epoch = tv.tv_sec;
+	if (this->overflow){
+		epoch += 63071999 + 2019686400;
+	}
+	return epoch;
 }
 
 /*!

ESP32Time.h

@@ -31,8 +31,8 @@ class ESP32Time {
 
 	public:
 		ESP32Time();
-		ESP32Time(long offset);
-		void setTime(long epoch = 1609459200, int ms = 0);	// default (1609459200) = 1st Jan 2021
+		ESP32Time(unsigned long offset);
+		void setTime(unsigned long epoch = 1609459200, int ms = 0);	// default (1609459200) = 1st Jan 2021
 		void setTime(int sc, int mn, int hr, int dy, int mt, int yr, int ms = 0);
 		void setTimeStruct(tm t);
 		tm getTimeStruct();
@@ -44,9 +44,9 @@ class ESP32Time {
 		String getDate(bool mode = false);
 		String getAmPm(bool lowercase = false);
 
-		long getEpoch();
-		long getMillis();
-		long getMicros();
+		unsigned long getEpoch();
+		unsigned long getMillis();
+		unsigned long getMicros();
 		int getSecond();
 		int getMinute();
 		int getHour(bool mode = false);
@@ -56,8 +56,11 @@ class ESP32Time {
 		int getMonth();
 		int getYear();
 
-		long offset;
-		long getLocalEpoch();
+		unsigned long offset;
+		unsigned long getLocalEpoch();
+		
+	private:
+		bool overflow;
 
 
 };

README.md

@@ -20,16 +20,16 @@ getDateTime(true)  //  (String) Sunday, January 17 2021 15:24:38
 getTimeDate()      //  (String) 15:24:38 Sun, Jan 17 2021
 getTimeDate(true)  //  (String) 15:24:38 Sunday, January 17 2021
 
-getMicros()        //  (long)    723546
-getMillis()        //  (long)    723
-getEpoch()         //  (long)    1609459200
-getLocalEpoch()    //  (long)    1609459200 // local epoch without offset
+getMicros()        //  (unsigned long)    723546
+getMillis()        //  (unsigned long)    723
+getEpoch()         //  (unsigned long)    1609459200
+getLocalEpoch()    //  (unsigned long)    1609459200 // local epoch without offset
 getSecond()        //  (int)     38    (0-59)
 getMinute()        //  (int)     24    (0-59)
 getHour()          //  (int)     3     (0-12)
 getHour(true)      //  (int)     15    (0-23)
 getAmPm()          //  (String)  pm
-getAmPm(true)      //  (String)  PM
+getAmPm(false)     //  (String)  PM
 getDay()           //  (int)     17    (1-31)
 getDayofWeek()     //  (int)     0     (0-6)
 getDayofYear()     //  (int)     16    (0-365)

examples/esp32_time/esp32_time.ino

@@ -29,7 +29,7 @@ ESP32Time rtc(3600);  // offset in seconds GMT+1
 
 void setup() {
   Serial.begin(115200);
-  rtc.setTime(30, 24, 15, 17, 1, 2021);  // 17th Jan 2021 15:24:30
+  rtc.setTime(30, 24, 15, 17, 1, 2042);  // 17th Jan 2021 15:24:30
   //rtc.setTime(1609459200);  // 1st Jan 2021 00:00:00
   //rtc.offset = 7200; // change offset value
 

examples/esp32_time_multiple/esp32_time_multiple.ino

@@ -47,9 +47,9 @@ void loop() {
 //  Serial.println(rtc.getTimeDate());      //  (String) 15:24:38 Sun, Jan 17 2021
 //  Serial.println(rtc.getTimeDate(true));  //  (String) 15:24:38 Sunday, January 17 2021
 //
-//  Serial.println(rtc.getMicros());        //  (long)    723546
-//  Serial.println(rtc.getMillis());        //  (long)    723
-//  Serial.println(rtc.getEpoch());         //  (long)    1609459200
+//  Serial.println(rtc.getMicros());        //  (unsigned long)    723546
+//  Serial.println(rtc.getMillis());        //  (unsigned long)    723
+//  Serial.println(rtc.getEpoch());         //  (unsigned long)    1609459200
 //  Serial.println(rtc.getSecond());        //  (int)     38    (0-59)
 //  Serial.println(rtc.getMinute());        //  (int)     24    (0-59)
 //  Serial.println(rtc.getHour());          //  (int)     3     (0-12)
@@ -68,10 +68,10 @@ void loop() {
 
   // formating options  http://www.cplusplus.com/reference/ctime/strftime/
 
-  Serial.println(rtc.getEpoch());         //  (long)    
-  Serial.println(rtc1.getEpoch());         //  (long)   
-  Serial.println(rtc2.getEpoch());         //  (long)    
+  Serial.println(rtc.getEpoch());         //  (unsigned long)    
+  Serial.println(rtc1.getEpoch());         //  (unsigned long)   
+  Serial.println(rtc2.getEpoch());         //  (unsigned long)    
 
-  Serial.println(rtc.getLocalEpoch());         //  (long) epoch without offset, same for all instances
+  Serial.println(rtc.getLocalEpoch());         //  (unsigned long) epoch without offset, same for all instances
   delay(1000);
 }

examples/esp32_time_sleep/esp32_time_sleep.ino

@@ -0,0 +1,70 @@
+/*
+   MIT License
+
+  Copyright (c) 2021 Felix Biego
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+*/
+
+#include <ESP32Time.h>
+
+#define uS_TO_S_FACTOR 1000000ULL  /* Conversion factor for micro seconds to seconds */
+#define TIME_TO_SLEEP  5        /* Time ESP32 will go to sleep (in seconds) */
+
+ESP32Time rtc;
+
+
+void wakeup_reason() {
+  esp_sleep_wakeup_cause_t wakeup_reason;
+
+  wakeup_reason = esp_sleep_get_wakeup_cause();
+  switch (wakeup_reason)
+  {
+    case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
+    case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
+    case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
+    case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
+    case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
+    default :
+      Serial.printf("Wakeup was not caused by deep sleep: %d\n", wakeup_reason);
+      rtc.setTime(30, 24, 15, 17, 1, 2021);  // 17th Jan 2021 15:24:30
+      //rtc.setTime(1609459200);  // 1st Jan 2021 00:00:00
+      //rtc.offset = 7200; // change offset value
+
+      break;
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  wakeup_reason();
+
+  Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S"));   // (String) returns time with specified format
+
+  esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
+
+  Serial.println("Going to sleep now");
+  Serial.flush();
+  esp_deep_sleep_start();
+}
+
+void loop() {
+  
+}

library.json

@@ -1,6 +1,6 @@
 {
   "name": "ESP32Time",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "keywords": "Arduino, ESP32, Time, Internal RTC",
   "description": "An Arduino library for setting and retrieving internal RTC time on ESP32 boards",
   "repository":

library.properties

@@ -1,5 +1,5 @@
 name=ESP32Time
-version=1.1.0
+version=2.0.0
 author=fbiego
 maintainer=fbiego
 sentence=Set and retrieve internal RTC time on ESP32 boards.