EEPROM Problem (cant clear arduino-uno eeprom)

Asked Apr 22 '22 at 14:36

Active Apr 22 '22 at 14:36

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I have encountered problem with my Arduino Uno, I just recently started using arduino, and this is my first time to use the EEPROM. My problem is that I have created a password protected door, and due to several attempts I have stored so much password and I dont know which one is the correct, since it always prompts me "Wrong password". I have tried to:

display the password in the lcd using lcd.print

this made the lcd display characters with 111 and a character that looks like a 3 horizontal lines, I dont know how to input the 3 horizontal character lines on my keypad matrix
tried to clear the EEPROM memory using the built-in arduino example (EEPROM_clear)

but to no avail, the password in the EEPROM is retained , and now I cant figure out the password

What should I do please help me :(

asked Apr 22 '22 at 14:36

Karolo

try to modify the clear example to write FF. `EEPROM.write(i, FF);` – Juraj Apr 22 '22 at 15:11
@Juraj sir it states that FF is not declared in the scope, I have copy pasted your sygegstion into `for (int i = 0 ; i < EEPROM.length() ; i++) { EEPROM.write(i, FF);` – Karolo Apr 22 '22 at 15:16
sorry `EEPROM.write(i, 0xFF);` – Juraj Apr 22 '22 at 17:30
@Juraj sir still not working :( – Karolo Apr 22 '22 at 17:32

EEPROM Problem (cant clear arduino-uno eeprom)

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