[arm-allstar] A simplified USB FOB modification

[Doug Crompton]

I often get requests for GPIO control of COS and PTT on the BBB and RPi2. While we are going to have that capability in the next release at least for the RPi2 I often wonder why the great desire to do this and what the problem is with just modifying the FOB. No matter where the I/O control comes from you still have to build a minimal interface for the signals. Having it all come from one place, the FOB, has several advantages. One is you can use the code as it is now, the other is is you are not tying up I/O on the main board and running wires from two different places.

In our testing I have built and tested it both ways GPIO  from the RPi2 or the FOB and I honestly think it is easier to just modify the FOB. I have written an article showing an easy way to modify the FOB that I think most hams who have soldering and small construction experience could handle. It saves you about $70/node to do this and a couple of hours of your time. The article is in the how-to section at hamvoip.org 

Here is a direct link to it -

 http://crompton.com/hamradio/usb_fob_simple_modification/

So give it a try. You certainly don't have much to lose at about $3.50 in single quantities!

I would be glad to answer any questions you may have about this project.

73 Doug
WA3DSP
http://www.crompton.com/hamradio
 		 	   		  
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