4

I've connected a real time clock ZS-042 to my Arduino Uno. I tried to set the time, using an example from DS1307RTC library. Here is my code:

#include <DS1307RTC.h>
#include <Time.h>
#include <Wire.h>

*const* char *monthName[12] = {
  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

  tmElements_t tm;//it says that problem is in here

void setup() {

  bool parse=false;
  bool config=false;

  // get the date and time the compiler was run
  if (getDate(__DATE__) && getTime(__TIME__)) {
    parse = true;
    // and configure the RTC with this info
    if (RTC.write(tm)) {
      config = true;
    }
  }

  Serial.begin(9600);
  while (!Serial) ; // wait for Arduino Serial Monitor
  delay(200);
  if (parse && config) {
    Serial.print("DS1307 configured Time=");
    Serial.print(__TIME__);
    Serial.print(", Date=");
    Serial.println(__DATE__);
  } else if (parse) {
    Serial.println("DS1307 Communication Error :-{");
    Serial.println("Please check your circuitry");
  } else {
    Serial.print("Could not parse info from the compiler, Time=\"");
    Serial.print(__TIME__);
    Serial.print("\", Date=\"");
    Serial.print(__DATE__);
    Serial.println("\"");
  }
}

void loop() {
}

bool getTime(const char *str)
{
  int Hour, Min, Sec;

  if (sscanf(str, "%d:%d:%d", &Hour, &Min, &Sec) != 3) return false;
  tm.Hour = Hour;
  tm.Minute = Min;
  tm.Second = Sec;
  return true;
}

bool getDate(const char *str)
{
  char Month[12];
  int Day, Year;
  uint8_t monthIndex;

  if (sscanf(str, "%s %d %d", Month, &Day, &Year) != 3) return false;
  for (monthIndex = 0; monthIndex < 12; monthIndex++) {
    if (strcmp(Month, monthName[monthIndex]) == 0) break;
  }
  if (monthIndex >= 12) return false;
  tm.Day = Day;
  tm.Month = monthIndex + 1;
  tm.Year = CalendarYrToTm(Year);
  return true;
}

and this is my output:

Arduino: 1.6.12 (Windows 10), Плата:"Arduino/Genuino Uno"

In file included from C:\Users\6939~1\AppData\Local\Temp\arduino_modified_sketch_566010\SetTime.ino:1:0:

C:\Users\папа\Documents\Arduino\libraries\DS1307RTC/DS1307RTC.h:19:22: error: 'tmElements_t' has not been declared

     static bool read(tmElements_t &tm);

                      ^

C:\Users\папа\Documents\Arduino\libraries\DS1307RTC/DS1307RTC.h:20:23: error: 'tmElements_t' has not been declared

     static bool write(tmElements_t &tm);

                       ^

SetTime:10: error: 'tmElements_t' does not name a type

   tmElements_t tm;

   ^

C:\Users\6939~1\AppData\Local\Temp\arduino_modified_sketch_566010\SetTime.ino: In function 'void setup()':

SetTime:21: error: expected primary-expression before ')' token

     if (RTC.write(tm)) {

                     ^

C:\Users\6939~1\AppData\Local\Temp\arduino_modified_sketch_566010\SetTime.ino: In function 'bool getTime(const char*)':

SetTime:54: error: expected unqualified-id before '.' token

   tm.Hour = Hour;

     ^

SetTime:55: error: expected unqualified-id before '.' token

   tm.Minute = Min;

     ^

SetTime:56: error: expected unqualified-id before '.' token

   tm.Second = Sec;

     ^

C:\Users\6939~1\AppData\Local\Temp\arduino_modified_sketch_566010\SetTime.ino: In function 'bool getDate(const char*)':

SetTime:71: error: expected unqualified-id before '.' token

   tm.Day = Day;

     ^

SetTime:72: error: expected unqualified-id before '.' token

   tm.Month = monthIndex + 1;

     ^

SetTime:73: error: expected unqualified-id before '.' token

   tm.Year = CalendarYrToTm(Year);

     ^

exit status 1
'tmElements_t' does not name a type
2

Clearly the compiler does not know what tmElements_t means.

It is defined in TimeLib.h

In your program you reference Time.h instead, where it is not defined.

So: Change

include <Time.h>

to

include <TimeLib.h>

and it should clear that error.

  • 2
    Time.h was changed to TimeLib.h specifically to combat this problem. The compiler started providing time.h, and on operating systems like Windows that use a case-insensitive filesystem it confuses Time.h and time.h. – Majenko Aug 13 '17 at 15:22
  • 1
    Thank you for help! It works! The problem was in TimeLib.h. Literally, it wasn't in my lib, so i had to re-install it. Then I changed include as you said and it works. – Anton Sachko Aug 13 '17 at 16:00
  • But for now I've got another trouble. My serial port doesn't print anything. – Anton Sachko Aug 13 '17 at 16:16
  • Take out the while (!Serial) - once you do the Serial.begin(9600) you can assume it is ready to receive output. Also, be aware that in the Arduino IDE, opening the serial monitor will restart your program. – SDsolar Aug 13 '17 at 18:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.