> BEWARE! There are different voltages used in serial connections. PC
> uses RS-232 (-12V/12V) level while some boards only support TTL level
> (0V/5V). You might burn down your stuff before even started. Check the
> wiki and the gumstix homepage to see whether you have a RS-232 or TTL
> port. If only TTL, you need to convert the signal first.
Currently, if it's round and black (i.e. Mini-DIN8) then it's RS-232
voltages, otherwise its logic level.
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