'tmElements_t' does not name a type

Question

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:\Users6939円~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:\Users6939円~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:\Users6939円~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:\Users6939円~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

• Mikael Patel: Check the order of header files and check the dependencies. Do you have the right libraries. Looks like you have modified this example sketch; github.com/PaulStoffregen/DS1307RTC/blob/master/examples/…
• 001: IDE 1.6.10: compilation of sketches wich time library fails
• SDsolar: Welcome to Arduino Stack Exchange. You can take the tour at arduino.stackexchange.com/Tour to get the best out of this site.

Answer 1

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.

• Majenko: 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.
• Anton Sachko: 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: But for now I've got another trouble. My serial port doesn't print anything.
• SDsolar: 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.