[time-nuts] Rapco 1804M - serial problems?
David J Taylor
david-taylor at blueyonder.co.uk
Wed Oct 19 09:21:35 UTC 2011
> Actually no, it doesn't have to be the software. In my day job, I work
> for a company that makes terminal servers (networked serial
> concentrators) and have seen many times where USB/serial converters do
> not behave properly. I would bet that choosing a different USB/serial
> dongle would fix the problem. Generally speaking it seems the FTDI based
> units are the most dependable, but implementations vary.
Many thanks for your remarks. Actually, I do trust this particular
USB/Serial box, as it's never let me down before.
Encouraged by your remarks, I have made more tests, and found a second
cure! Use a different RS-232 cable, with just RX/TX/ground pins
connected. No control lines. That simple. I don't have an RS-232
breakout box, otherwise I might have watched the control lines to see
where the problem was, but I feel as if I've wasted a day on this already!
Thanks for your comments and help.
Now to write a program to graph the number of satellites, PDOP and signal
level so that I can see whether the different GPS antenna puck I bought
makes any difference. Or not!
SatSignal software - quality software written to your requirements
Email: david-taylor at blueyonder.co.uk
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