How can I read date and time from PCF85063A rtc in esp32 board by using i2c protocol

Projects Programming
1 
#include <PCF85063A.h>

PCF85063A rtc;
time_t t;

void setup() {
  tmElements_t tm;

  Serial.begin(57600);

  Serial.println(String("Resetting RTC, status: ") + rtc.reset());
  Serial.println("Setting time to Tue, 08 Nov 2016 23:49:50");

  /* Convert Unix timestamp to tmElements_t */
  breakTime(1478648990, tm);
  rtc.time_set(&tm);
}

/* Print human readable time */
void print_time(tmElements_t t) {
  Serial.print(String("Year ") + (1970 + t.Year));
  Serial.print(String(" Month ") + t.Month);
  Serial.print(String(" Day ") + t.Day);
  Serial.print(String(" Wday ") + t.Wday);
  Serial.print(String(" Hour ") + t.Hour);
  Serial.print(String(" Minute ") + t.Minute);
  Serial.print(String(" Second ") + t.Second);
  Serial.print("\n");
}

void loop() {
  tmElements_t t;

  /* Get and print current time */
  rtc.time_get(&t);
  print_time(t);

  /* Print Unix timestamp */
  Serial.print("Unix time: ");
  Serial.println(makeTime(t));

  delay(1000);
}
2 
Arduino: 1.8.19 (Windows 10), Board: "ESP32 Dev Module, Disabled, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 115200, None"

In file included from C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:25:0:

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.h:101:19: error: 'tmElements_t' has not been declared

     bool time_get(tmElements_t *now);

                   ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.h:110:19: error: 'tmElements_t' has not been declared

     bool time_set(tmElements_t *new_time);

                   ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:98:21: error: 'bool PCF85063A::time_get' is not a static data member of 'class PCF85063A'

 PCF85063A::time_get(tmElements_t *now)

                     ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:98:21: error: 'tmElements_t' was not declared in this scope

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:98:35: error: 'now' was not declared in this scope

 PCF85063A::time_get(tmElements_t *now)

                                   ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:99:1: error: expected ',' or ';' before '{' token

 {

 ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:117:21: error: 'bool PCF85063A::time_set' is not a static data member of 'class PCF85063A'

 PCF85063A::time_set(tmElements_t *new_time)

                     ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:117:21: error: 'tmElements_t' was not declared in this scope

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:117:35: error: 'new_time' was not declared in this scope

 PCF85063A::time_set(tmElements_t *new_time)

                                   ^

C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master\PCF85063A.cpp:118:1: error: expected ',' or ';' before '{' token

 {

 ^

Multiple libraries were found for "TimeLib.h"

 Used: C:\Users\shanawaz\Documents\Arduino\libraries\Time-master

 Not used: C:\Users\shanawaz\Documents\Arduino\libraries\Time-1.6.1

Multiple libraries were found for "PCF85063A.h"

 Used: C:\Users\shanawaz\Documents\Arduino\libraries\pcf85063a-master

 Not used: C:\Users\shanawaz\Documents\Arduino\libraries\PCF85063A-Arduino-Library-master

exit status 1

Error compiling for board ESP32 Dev Module.


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
3

please help me Anyone :pray: :pray: by using wire library

4

Why not use the internal rtc of the ESP32?

Did the PCF85063A example work?

5

We are using external RTC device and I'm testing example only but still I'm getting error.

6

Hi, @kalyantillu
to use structure "tmElements_t t;"
you need the Timelib.h library.

7

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