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[wxsig] wind sensor prob

William Beals will at beals5.com
Thu Feb 15 03:57:33 UTC 2007


It does smell of some kind of intermittent communication error of some kind.
Firstest and easiest thing to try is check things out on your bench with
nice short cables to all the sensors.  If problems are ony with longer
cables, that is a unique debugging strategy.

If the problem is on your bench, then check for standard stuff like dry
solder joints on all the components associated with the 1-wire interface,
including the connector.  It may not hurt to insert/remove the RJ11 jacks a
dozen times in case some flux may be on the connectors.

Something else to check is the 1-wire bus voltage.  One of the display
screens while you are showing wx data will show the bus voltage.
Additionally check the bus voltage at the T238 connector and sensor with a
voltmeter, if all are >4.5V life is good, if any is low, let us know.

Also, if not done already, ensure minimum sensors on the network to see if
it an individual sensor that may be messing with the 1-wire bus.

Hope that helps, based on your answers, hopefully we can get an idea of
where to head for round 2.


-----Original Message-----
From: wxsig-bounces at lists.tapr.org [mailto:wxsig-bounces at lists.tapr.org] On
Behalf Of John Yost
Sent: Tuesday, February 13, 2007 9:08 PM
To: wxsig at lists.tapr.org
Subject: [wxsig] wind sensor prob

I just finished up the T238+.  Nice kit.

After a couple of power on-off cycles, the temp sensor has become
intermittent - works for a few cycles then just dashes for a couple cycles.
The wind direction senor stopped altogether, just dashes for it now.

Wind speed works great though.

Also, sometimes it seems to take along time to initialize at the "in memory
of" screen, several minutes.

Voltages look good, heartbeat is strong.

I know its vague info but any suggestions are appreciated.


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