Re: [Owfs-developers] DS18S20 incorrect readings on NSLU - problems with direct powering through USB

Sun, 22 Oct 2006 02:12:57 -0700

Title: Message
Hi Christian - I've done some more mucking about and your guess is actually pretty close. I've found the problem:
 
I've recently started powering my slug directly via the USB port, as a workaround for these devices not booting when power is applied after a power-out (obviously a problem for a remote weatherstation). The power source I'm doing this with is correctly rated, but I'm guessing being non regulated the output is not quite right, because when I went back to powering the normal way with the linksys power supply all of the 1-wire problems went away.
 
so thanks for looking into it Christian and Paul . I'll experiment with different adaptors for direct USB powering on the slug and post it here since it is a useful bit of info for those who want always-on 1-wire devices running on a slug
 
I'll upgrade to the new owfs version Christian, thanks for the port
 
thanks
Lorenz
 
 
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Christian Magnusson
Sent: Sunday, 22 October 2006 7:03 PM
To: [email protected]
Subject: Re: [Owfs-developers] DS18S20 incorrect readings on NSLU

 

It might have been the usb-timeout bug, but my guess is that the signal-quality in your 1-wire cables are bad for some reason…

 

I have compiled 2.5p5-1 now (and uploaded to sourceforge.net), so could you try to update to the latest version now?

 

/Christian

 

 

Från: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] För Lorenz Drack
Skickat: den 22 oktober 2006 10:03
Till: [email protected]
Ämne: Re: [Owfs-developers] DS18S20 incorrect readings on NSLU

 

well, additionally I've done this ...

 

1. downgraded owfs and owlib to v2.4p1-1

2. removed owcapi and owshell

 

and I still have exactly the same problems, so I'm stumped. 2.4p1-1 previously worked.

 

have perhaps any of the motion, libfuse, kmod-fuse, fuse-utils or ffmpeg also changed since v2.4p1-1?

 

thanks

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Alfille
Sent: Sunday, 22 October 2006 1:59 PM
To: [email protected]
Subject: Re: [Owfs-developers] DS18S20 incorrect readings on NSLU

Hello Lorenz,

I just tried the current version -- DS18S20 seems to work fine (owhttpd) on the standard platform.

There is a new release coming -- 2.5p5 with fixes for the DS2438 current sensing among other things. Perhaps Christian can create a new NSLU package for that one. I'll test it as well.

The problem certainly isn't obvious from the symptoms you describe. Any other clues?

Paul Alfille

On 10/21/06, Lorenz Drack < [EMAIL PROTECTED]> wrote:

Hi - I'm running owfs 2.5p4-4 on the NSLU. I have 2 DS18S20 temperature sensors, one from hobby-boars and one from AAG. They both read a constant value all the time, 127.68 & -103.25 resepectively (regardless whether they are plugged in together or only one at a time, also regardless whether I have several devices on the network or only 1). My DS2406 based pressure sensor reports temperature fine. These temp sensors were previously working in 2.4p1-1 (but pressure wasn't supported in that release). Any hints on what I may be able to do?

thanks

Lorenz


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Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
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