Hi Greg, FWIW, I have a serial cable that is about 100 feet long and my
station has been operating for 5 years
On Saturday, February 10, 2018 at 6:13:37 PM UTC-7, Greg Troxel wrote:
> I have a Vantage Pro 2 with a recent datalogger, and with the included 8
> foot RJ11 extension cable and a PL2303 USB/serial adaptor (to a 2008
> vintage Mac notebook running NetBSD), weewx is running fine.
> I am about to run cables from the console to a more reasonable place for
> the computer. I notice that Davis specifies 48' max (the 8' plus a
> non-supplied 40'). I am inclined to use some CAT3 or CAT5 cable and use
> 2 pairs, one with ground/TX and one with ground/TX, and wire up a short
> connecting cable at each end to a DB9. My planned run might be a little
> longer than the 48' spec.
> So I wonder:
> Has anybody used a too-long cable, and did it work ok? What type,
> length and ok or not?
> The datalogger is labeled serial, but I notice it doesn't say RS232.
> Is it real RS232 levels (-12V/+12V, ish), or TTL (0/5V)?
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