There are many different ways to skin this cat.


One question I have is why do you want to connect to the radio modem via Ethernet? The transmission rates are slow enough that serial or USB work fine. I only mention this because I’ve gone through that selection process for a UAV. BTW, after using Microhard for a while we switched to FreeWave. Your specific needs may be different.


While I have no experience with, and nothing against the GPSstix board (and want to see Gumstix, Inc. do well J ), don’t rule out one of the many GPS boards available that could connect through I2C, SPI, serial, or ???.


I’m also working on a robotics project. I chose the verdex xm-4, robostix, netwifimicro-SD bundle. I was at a point where I needed to do some experimentation in order to narrow my design choices, but they weren’t narrow enough to define “The” board set to do the job. I chose this combination because its combined feature set seemed likely to be at least 90% of what I need.



Jay Phillips

Tronix LLC -


From: [] On Behalf Of Brian Joly
Sent: Wednesday, February 06, 2008 10:23 AM
Subject: [Gumstix-users] Need Help choosing Gumstix and expansion boards


I am trying to determine the best gumstix board and expansion boards to fit my mobile robot project goals.  Briefly stated, I want to be able to network remotely with a gumstix computer.  I will likely be using modems such as the Spectra 920A from Microhard Corp <>.  I want to be able to drive servos and connect to various sensors (ie, GPS).  Based on these goals, I think I should go with the Connex 400xm with both Robostix and GPSstix expansion boards but I also need to have ethernet to connect to my modem.  Any recommendations?  Perhaps I should switch to Verdex, but then I wouldn't be able run GPS stix.

Any advice would be greatly appreciated.




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