Because I want to do something depend from values.
if i have HEX ----> 123ABC
Asign each HEX number to value
String1 = '1'
String2 = '2'
String3 = '3'
String4 = 'A'
String5 = 'B'
String6 = 'C'
then i can use every sended HEX number to do something
if(String1 == '1') -----> turn on a RED led
if(String1 == '2') -----> turn on a GREEN led
if(String1 == '3') -----> turn on a BLUE led
....
if(String2 == '1') ----> turn on a motor
if(String2 == '2') ----> turn off a motor
if(String2 == '3') ----> turn .....
....