Hi guys, I'm working on a new project with Arduino Mega. And i have a problem, I'm using:
- LCD 20x4
- RTC DS1307
- Shield SD Card
- Keypad 4x4
I exsplain my project.
When I select the right code, Arduino turns on a relay and it starts a timer it using the library leOS2.
After when I press "D" on the keypad Arduino turns off the relay and saves the timer with the date in SD card.
Ok, this program works very well if I read the data with the Serial Monitor. But when I use LCD, it works well to some hours and after the LCD doesn't work, it crashes and it doesn't show anything.
Do you have any advices? I can't understand what is the problem.
I attach my code.
while(num > -1){
//Riazzero la password
pass[0] = 0;
pass[1] = 0;
pass[2] = 0;
pass[3] = 0;
keypressed = myKeypad.getKey();
if(num < 20 && num > -1){
lcd.setCursor(0,0);
lcd.print("Accesso effettuato! ");
lcd.setCursor(0,1);
lcd.print("Utente ");
lcd.print(num + 1);
lcd.print(" ");
myOS.restartTask(updateRTC);
lcd.setCursor(0,3);
lcd.print(" ");
lcd.print("'D' per uscire");
if (keypressed != NO_KEY)
{
Serial.print(keypressed);
pass_nuova = keypressed;
}
delay(500);
if(pass_nuova == 'D'){
myOS.pauseTask(updateRTC);
lcd.setCursor(0,1);
lcd.print(" ");
lcd.setCursor(0,2);
lcd.print(" ");
lcd.setCursor(0,3);
lcd.print(" ");
delay(500);
lcd.clear();
Thanks 
project.ino (33 KB)