I have be advised that twisted pair cables are really only good for
RS-485/422 where differential signals are used. Since RS-232 is
single ended, I am not sure that twisting the conductors matters.
I have been also told that the a more important factor of the cabling
for RS-232 is the capacitance. The lower the better to achive greater
What would be interesting to know is whether the lines running from
the console to the remote thermo unit and the lines running from the
remote thermo to the wind sensor are RS-232 line levels?
If so, I am wondering if there is not some cheap RS-232 to RS-485
inline converters that could be used. I know that such converters are
available but the prices would have to be very very low in order to
use them in conjunction with the La Crosse units.
To bad that La Crosse did not go with differential signals in the
begining. I guess they would have had to spend more on the cabling.
That is probably not practial in mass-marketing of such devices.
--- In firstname.lastname@example.org, "Kevin" <mail@...> wrote:
> The link above has info on solving the false wind readings.
> Electromagnetic interference is the cause.
> This could be motor noise. The brushes of electric motors create RF
> radiation across the entire spectrum, AM, FM, TV, CELL, PHONE, HAM,
> BUSINESS BAND, FRS, All have potential to radiate and induce signals
> into the transition line between the wind sensor and the Temp Hum
> that are interpreted by the console as 57 mph wind speeds.
> Take an AM radio and place it next to your CRT TV or computer
> and you will hear noise.
> In my case I believe its 110 volt ac wiring from the house to my
> light, its one tower leg away from the wind sensor cable.
> To avoid having to replace the wind sensor cable and voiding the
> warranty try twisting the cable several twists per foot. This will
> cause the interference to be induced out of phase every few inches
> canceling the interference, basic wave propagation physics.
> They should redesign the electronics or use twisted pair instead of
> the cheaper flat ribbon style phone cable that is designed to go
> the wall jack to your phone and make it easy to put connectors on,
> transmit data long distances without interference.
> I'm still waiting for the weather to break to implement the twist at
> my place. Currently since I'm only running WUHU in serial, direct
> connect, rapid fire mode the interference is not a problem as I
> checked the box to ignore bad readings :)
> May the weather be with you! LOL
> --- In email@example.com, "gary2cubs" <gocubs1@>
> > Hi!
> > I just got a new wind sensor as the last one did not work (had a
> > short). I got the new sensor up today, and now my console keeps
> > displaying a 57 mph wind gust. The actual winds are about 2 mph
> > there are no gusts at all. The gusts are showing up on the WUHU
> > software also, but when I look at the WS2310 console, the 57.0
> > is on there also. Any ideas on what is going on?
> > Thanks!
> > Gary