Convert Hexadecimal value to ASCII value manually

If you send 0x6B to the LCD, you're sending the ASCII code for “k”.

If you want to display “0x6B“, you need to send 4 ASCII characters. 0x6B==>0x30, 0x78, 0x36, 0x38.

The actual value is stored in binary, not in hex. If you want to display it in hex, a conversion that has to be made! Is that what you want?

barry said:

If you send 0x6B to the LCD, you're sending the ASCII code for “k”.

If you want to display “0x6B“, you need to send 4 ASCII characters. 0x6B==>0x30, 0x78, 0x36, 0x38.

Click to expand...

Thanks how did you know that 4 ASCII characters have to be sent ? What's the logic behind this ?
Why magical numbers 0x30, 0x78, 0x36, 0x38.? What's the logic behind this ?

Fan174 said:

Thanks how did you know that 4 ASCII characters have to be sent ? What's the logic behind this ?
Why magical numbers 0x30, 0x78, 0x36, 0x38.? What's the logic behind this ?

Click to expand...

... because you expect the display to show 4 characters.

The display works with ASCII coded characters. In C you have to use a "string" as variable.
0x6B (barry accidentally misread the "B" as "8". I´ve corrected this here)
are 4 characters "0x6B":
0: has the ASCII code 0x30, or "0" as string or '0' as single character
x: has the ASCII code 0x78 , or "x" as string or 'x' as single character
6: has the ASCII code 0x36, or ... see above
B: has the ASCII character 0x42, or ... see above

Please do an internet search for "ASCII table".
While ASCII is a standard, your display may use non standard codes.
Thus even better: read the datasheet of your display. (we professionals have to do this, too)

There are libraries for every language that do this for you.

Klaus