Dear Alex ,
the keypad 4×4
count from 7 its Ascii value is 1
button 4 …ascii value 2
button 1 …ascii value 3
button on/c …ascii value 4
button 8 …ascii value 5
button 5…ascii value 6
button 2 …ascii value 7
button 0 …ascii value 8
button 9 …ascii value 9
button 6 …ascii value 10
button 3 …ascii value 11
button = …ascii value 12
button % …ascii value 13
button x…ascii value 14
button – …ascii value 15
button + …ascii value 16
for show the number to screen i convert to ascii by adding 48
or using
inttostr function
after i press 4 button ,
then later the lcd show the number 4000
i dont know whats up
thanks for u help