[Xastir] Hardware

[Ray Wells]

Thanks for the suggestion re FTDI. I already have a powered hub and, in 
fact, the RPi runs from it. I've been evaluating soundmodem and although 
I can see traffic with soundmodemconfig, results are generally quite 
disappointing with regard to reliability and repeatability. I have 
similar disappointment with my main computer, not just the RPi so I've 
decided TNCs of one sort or another is the way to go.

Ray vk2tv

On 21/08/12 21:20, Andrew Errington wrote:
> On Tue, 21 Aug 2012 19:35:18 Ray Wells wrote:
>> I'm setting up a Raspberry Pi to use as an aprs gateway (30m, 2m and 2m
>> satgate).
>>
>> Does anyone on the list have any thoughts on using a USB to 4 port RS232
>> adapter to provide serial ports for TNCs.  The RPi has only USB.
>>
>> Ray vk2tv
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> Should be fine, but I would make two recommendations (not that I am in the
> same situation, but here's what I would do if I was).
>
> 1) Use a powered USB hub
> This will reduce the load on the RPi PSU and circuitry.
> 2) Use FTDI-based USB-to-serial-converters
> Each one has (or should have) a unique serial number which can be queried by
> udev.  You can use this feature to ensure that you can map the same device to
> the same port every time you reboot.
>
> 73,
>
> Andrew
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