Re: [Gumstix-users] Gumstix Console via Robostix

[Dave H. <dhy...@gm...>]

Hi David,

> I have a connex 400m, a wifi-CF (fcc), and a robostix-th. I soldered a
> wire-wrap header to the robostix gumstix port. I spliced a cross-over serial
> cable to give a connection to pins 2 and 3 on the cable. I also have a small
> cable made up with a pin that can go to any pin on the female end of the
> cable (incase i need a gnd for the cable). I am having some issues with
> getting the device to respond. I have swapped the wires for the serial port
> between pins 2 and 4 on the robostix, i have added the gnd (pin 1) to pin 5
> of the cable, and used it with it off. I get a green LED on my robostix, but
> no console. I can type characters and they are echoed back to me but that is
> it. I have tried this with the wifistix connected and removed. I'm using a
> 5v powersupply. I feel I am missing something (other than the obvious answer
> of brains ;-P those went fell out of my skull long ago :P).

The serial pins on the  robostix are logic level pins. So you can't
hook it up directly to the PC. You need a serial adapter in the
middle.

You definitely need ground for the cable.

See:
<http://docswiki.gumstix.com/Serial_adapters>
<http://docswiki.gumstix.com/Serial_voltages>

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/