signed vs unsigned integers

    Mar 29 2011 | 11:47 am
    for a project including communication with an arduino board, we try to "save" bytes in order to send less data as possible.
    I wonder how i can turn my lists of signed integers into unsigned integers.
    We send consecutive leds state, by list of 100.
    The example would be :
    2 leds are on = 2 x 255
    and i would like to turn it into 11111111 11111111 or 65535
    Is there an object which converts into char ?