ho provato pure a disinstallare arduino e cartella ma niente non va :(

Cosa significa non va? Sempre stesso errore?
hai verificato le maiuscole/minuscole?
che errore ti da?
@Colaki : Mimmo potresti provare ad indicargli quella procedura che avevi trovato tu per fargli vedere la libreria?

steso errore, ho pure fatto aggiungi nuova libreria e ho messo la cartella menu ma nulla non va

Ci provo. Ho fatto così:
dalla cartella LIBRERIES ho tolto tutte le cartelle e le ho messe fuori in una nuova che puoi chiamare come vuoi;
poi nella cartella LIBRERIES ho inserito tutte le librerie che sono elencate all'inizio della sketch di SirNino e quindi :LIquidcristall, MenuBackend, RTClib, Wire ed ho creato una cartella chiamata ProvaMenu.
Nella cartella ProvaMenu ho inserito il file MenuBackend.h già modificato e uguale a quello che si trova nella cartelle MenuBackend.
Riavvii IDE e dovrebbe funzionare.:-))

le cartelkle della libraries fuori dove le hai messe?

In un'unica cartella che ho chiamato "Nuova Cartella" e messa sotto Arduino cioè dove ci sono le cartelle, drivers, examples, ecc.ecc.

ho provato niente stesso errore











sketch_sep09a:17: error: variable or field 'setMode' declared void
sketch_sep09a:17: error: 'DateTime' was not declared in this scope
sketch_sep09a:21: error: 'RTC_DS1307' does not name a type
sketch_sep09a:219: error: 'LiquidCrystal' does not name a type
sketch_sep09a.ino: In function 'void setup()':
sketch_sep09a:318: error: 'Wire' was not declared in this scope
sketch_sep09a:319: error: 'RTC' was not declared in this scope
sketch_sep09a:320: error: 'lcd' was not declared in this scope
sketch_sep09a:324: error: 'DateTime' was not declared in this scope
sketch_sep09a.ino: In function 'void pulischermo()':
sketch_sep09a:360: error: 'lcd' was not declared in this scope
sketch_sep09a:361: error: 'DateTime' was not declared in this scope
sketch_sep09a:361: error: expected `;' before 'now'
sketch_sep09a:362: error: 'now' was not declared in this scope
sketch_sep09a.ino: In function 'void setLCD()':
sketch_sep09a:381: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void ach()':
sketch_sep09a:387: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void fach()':
sketch_sep09a:393: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void tch()':
sketch_sep09a:401: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void ftch()':
sketch_sep09a:407: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void selOpt()':
sketch_sep09a:414: error: 'lcd' was not declared in this scope
sketch_sep09a.ino: In function 'void loop()':
sketch_sep09a:421: error: 'DateTime' was not declared in this scope
sketch_sep09a:421: error: expected `;' before 'now'
sketch_sep09a:439: error: 'now' was not declared in this scope
sketch_sep09a:443: error: 'now' was not declared in this scope
sketch_sep09a:446: error: 'now' was not declared in this scope
sketch_sep09a:450: error: 'now' was not declared in this scope
sketch_sep09a:453: error: 'now' was not declared in this scope
sketch_sep09a:457: error: 'now' was not declared in this scope
sketch_sep09a:460: error: 'now' was not declared in this scope
sketch_sep09a:464: error: 'now' was not declared in this scope
sketch_sep09a:467: error: 'now' was not declared in this scope
sketch_sep09a:471: error: 'now' was not declared in this scope
sketch_sep09a:474: error: 'now' was not declared in this scope
sketch_sep09a:478: error: 'now' was not declared in this scope
sketch_sep09a:481: error: 'now' was not declared in this scope
sketch_sep09a:485: error: 'now' was not declared in this scope
sketch_sep09a:488: error: 'now' was not declared in this scope
sketch_sep09a:492: error: 'now' was not declared in this scope
sketch_sep09a:496: error: 'now' was not declared in this scope
sketch_sep09a:510: error: 'now' was not declared in this scope
sketch_sep09a:524: error: 'now' was not declared in this scope
sketch_sep09a:538: error: 'now' was not declared in this scope
sketch_sep09a:551: error: 'now' was not declared in this scope
sketch_sep09a:565: error: 'now' was not declared in this scope
sketch_sep09a:578: error: 'now' was not declared in this scope
sketch_sep09a:592: error: 'now' was not declared in this scope
sketch_sep09a:605: error: 'now' was not declared in this scope
sketch_sep09a:619: error: 'now' was not declared in this scope
sketch_sep09a:632: error: 'now' was not declared in this scope
sketch_sep09a:646: error: 'now' was not declared in this scope
sketch_sep09a:659: error: 'now' was not declared in this scope
sketch_sep09a:673: error: 'now' was not declared in this scope
sketch_sep09a:686: error: 'now' was not declared in this scope
sketch_sep09a:700: error: 'now' was not declared in this scope
sketch_sep09a:724: error: 'lcd' was not declared in this scope
sketch_sep09a:726: error: 'now' was not declared in this scope
sketch_sep09a:742: error: 'setMode' was not declared in this scope
sketch_sep09a:1530: error: 'setMode' was not declared in this scope
sketch_sep09a.ino: At global scope:
sketch_sep09a:1556: error: variable or field 'setMode' declared void
sketch_sep09a:1556: error: 'DateTime' was not declared in this scope

come riavvio lide?
------------------------------------------------------------------------
ecco la cartella libraries cosa contiene



http://s30.postimg.cc/eebply06l/libraries.jpg

Visto è sbagliato.Non riesco ad inviarti una immagine. se mi dai la tua l'email

nella cartella arduino ho stessa cosa


http://s28.postimg.cc/gk9tq0mbd/arduino_cartella.jpg

Marco comprimi il tuo sketch e inviamelo in MP.