In file included from D:\a\Aquarium\Aquarium\Arduino aquarium backup 10-08-2016\lcdtest\lcdtest2\lcdtest2.ino:52:0:

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

     static bool read(tmElements_t &tm);

                      ^

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

     static bool write(tmElements_t &tm);

                       ^

D:\a\Aquarium\Aquarium\Arduino aquarium backup 10-08-2016\lcdtest\lcdtest2\lcdtest2.ino: In function 'void setup()':

lcdtest2:292: error: 'setSyncProvider' was not declared in this scope

   setSyncProvider(RTC.get);   // the function to get the time from the RTC

                          ^

lcdtest2:293: error: 'timeStatus' was not declared in this scope

   if(timeStatus()!= timeSet)

                 ^

lcdtest2:293: error: 'timeSet' was not declared in this scope

   if(timeStatus()!= timeSet)

                     ^

D:\a\Aquarium\Aquarium\Arduino aquarium backup 10-08-2016\lcdtest\lcdtest2\lcdtest2.ino: In function 'void scroll(int, int)':

lcdtest2:587: error: 'setTime' was not declared in this scope

           setTime(uur,minuut,sec,dag,maand,jaar);  // set systeem tijd

                                                ^

D:\a\Aquarium\Aquarium\Arduino aquarium backup 10-08-2016\lcdtest\lcdtest2\lcdtest2.ino: In function 'void gettijd()':

lcdtest2:1293: error: 'now' was not declared in this scope

  if (timeset == 1) RTC.set(now()), timeset = 0;

                                ^

lcdtest2:1295: error: 'tmElements_t' was not declared in this scope

  tmElements_t tm;

  ^

lcdtest2:1296: error: expected primary-expression before ')' token

  if (RTC.read(tm)) {

                 ^

lcdtest2:1297: error: expected primary-expression before '.' token

     uur = tm.Hour;

             ^

lcdtest2:1298: error: expected primary-expression before '.' token

     minuut = tm.Minute;

                ^

lcdtest2:1299: error: expected primary-expression before '.' token

     sec = tm.Second;

             ^

lcdtest2:1301: error: expected primary-expression before '.' token

     dag = tm.Day;

             ^

lcdtest2:1302: error: expected primary-expression before '.' token

     maand = tm.Month;

               ^

lcdtest2:1303: error: expected primary-expression before '.' token

     jaar = tmYearToCalendar(tm.Year);

                               ^

lcdtest2:1303: error: 'tmYearToCalendar' was not declared in this scope

     jaar = tmYearToCalendar(tm.Year);

                                    ^

exit status 1
'setSyncProvider' was not declared in this scope