Serial printing FFFFFF beyond what is necessary in Arduino...

Serial printing FFFFFF beyond what is necessary in Arduino, which will be this, this code out:

end16bit-4D FFFFFFB5, 11000, off-button1, button2-off, S1 = 0, FFFFFFC8, 0ffc8, 234, S2 = 3

however, do not know why this came out, FFFFFFB5 when it should be only B5, and tb FFFFFFC8 when it should be just C8,

I believe you contacted the wrong site as Digi does not offer any Arduino processors.

This code has the values ​​of a zigbee in API mode communicating with each other via arduino zigbee, I saw here and arduino zigbee involving questions too, and then?