Digital Code Lock With 3310 LCD

i do not define that i adjust spaces in such a way that when any key press it start to new line becoz lcd auto increment the address for next character let say a string end at the end of 2nd line then the next character automatically display on next 3rd line i did this logic u can set it by calling a function given in library

Diar MAJOKA
again very thanks
my big problem solve with your help
Thanks

you are welcome always

Dear MAJOKA
I have 2 problems more with this code .
1-if used ‘ * ‘ key one time then 2x16 LCD one digit delete but 3310 LCD all digit delete .
2-if power is off then new password is canceled and default password is set .
I want use internal EEPROM for this purpose Possible this?
Or used only external EEPROM ?
I am no idea used the EEPROM
Plz help me these 2 problems
Thanks

if used ‘ * ‘ key one time then 2x16 LCD one digit delete but 3310 LCD all digit delete .

upload ur code that u edit so can help u better

Or used only external EEPROM ?
I am no idea used the EEPROM

at89c51 does not have internal eeprom so u have to use external eeprom
use at24c01serial eeprom it is sufficient for ur application
if u want to learn it i can provide u some sample codes

with this code used ‘ * ‘ key 2x16 LCD one digit delete but 3310 LCD no digit delete .

plz send me eeprom sample code

why didnt you take out other LCD code? i see its still lurking out there.. first remove that if you are not using 16x2 lcd.

here i update code there was no code written for spaces on 3310 lcd
here r some samples for different eeprom
it is better option u use at24c01 for ur application it is better to handle at initial stage

Sir Ajay Bhargav
Thanks for replay attach 2x16 LCD only for code checking after the complete code 2x16 LCD remove

Dear MAJOKA
you r grate thanks for my help

ur welcome