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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