laforge-slides/2009/foss-mobile_world-seville2009/html/mgp00028.txt

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FOSS in the Mobile World
Serial console
How to find the serial console
Just run some code that you think writes to it
Use a Scope to find typical patterns of a serial port
I haven't actually done (or needed) this on the glofiish yet, but on many other devices
RxD pin is harder to find, just trial+error usually works as soon as you have some interactive prompt that echo's the characters you write
Don't forget to add level shifter from 3.3/5V to RS232 levels