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By: rob_conway
First post to this group however have been usinf owfs for a couple fo months
and want to grow my network. I have loaded owfs on my NSLU2 "aka SLUG" and
have a number of devices off the link. It works great 99.9% of the time and
am very pleased. I log the data and sync to NTP time and display this on a
web page.
I was wondering if anybody else has seen the following with respect to the DS2450
(4 ch A/D)
a/ A PIO channel sometimes, maybe once per month, change from 1 to 0 thus disabling
the analog input channel. I then go back into the interface (web page) and
change it back to 1 and all is well again. It can happen on any of the the
four channels however only 1 channel PIO gets changed. I have no scripts quering
PIO.x I suppose a fix maybe to query the PIO.x's and set it if its 0.
b/ The analog input reading seems very noisy ie the values change +/- 0.1 volts
on the Volt.x register ie 0-5v scale. I have ended up doing a number of reads
and averaging the result over a 15 minute period.
c/ You will also see on the attached link below a spike on one of the temperature
inputs. This can happen very infrequent and also late in the morning so I have
discounted any type of interference.
http://img.photobucket.com/albums/v319/rjconway/1wire.jpg
cheers
rob
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