what does [0] = 0x6D mean where last two can be any hexadecimal

[rupert]

Hi

Please could someone help me understand the instructions for obtaining a Pin on the below website. I am a C++ novice.

http://wiibrew.org/wiki/Wiimote#Bluetooth_Pairing

Lets assume the Wiimote has the bluetooth address "00:1E:35:3B:7E:6D". If you want the PIN for bluetooth pairing in a simple string, do the following:

char pin[6];
pin[0] = 0x6D;
pin[1] = 0x7E;
pin[2] = 0x3B;
pin[3] = 0x35;
pin[4] = 0x1E;
pin[5] = 0x00;

Now "pin" contains your bluetooth pin that should be used for pairing your devices.

[weaknessforcats]

pin is an array of 6 char integers.

pin[0] is the first element of the array. pin[5] is the last element of the array.

A char is an 8 bit integer.

A hexidecimal digit takes 4 bits:

1 is 0001 decimal 1
5 is 0101 decimal 5
6 is 0110 decimal 6
A is 1010 decimal 10
D is 1100 decimal 12
F is 1111 decimal 15

So you can get 2 hex digits into one char.

6D is 01101100

and that is what is inside pin[0].

If you display the pin[0] you get 109. So you could have used 109 instead of 0x6D but the 109 is not intuitive in meaning whereas the 0x6D is.