Colin Reese | 28 Aug 21:47 2015
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RTD Slave

Hi All,

Anybody have use for an RTD 1Wire slave? I'm finding I could really use one, and what's out there is too expensive, not compact and/or modular enough. I feel as though I'm missing something.

Seems to me a MAX31865, an ATTiny85, an LDO, and a little logic level conversion would do the trick in a tiny form factor for a pittance. What ROM address would/could I use for this guy?

Cheers,
Colin
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Mick Sulley | 28 Aug 14:59 2015

Monitoring Electricity Meter

I would like to monitor my electricity usage via the LED on the meter.  I found this project
http://www.jon00.me.uk/electmon.shtml
which is exactly what I want to do, but it uses an AAG counter board model TAI8585 and it would appear that AAG no longer exist.

Can anyone suggest an alternative board or some alternative way to achieve this.

Thanks
Mick
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David Johns | 28 Aug 08:37 2015
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owfs and /mnt/1wire directory

Hi,
I really don't know why I am having so many problems but the file system
mountpoint /mnt/1wire appears to be very sporadic. I am running Ubuntuserver
15.04 with owfs 2.9p8. I had previously tried owfs 3.1 but ran into
difficulty with libusb and after many days of research and trials, I gave
up. The patches suggested did not work and even if I set configure to
disable USB, that failed too as it seemed to completely ignore that it was
set to disable.

I am starting owserver, owhttpd and owftpd at boot but nowhere can I find
whether owfs is required to start at boot either. The /mnt/1wire directory
remains empty but if I manually start owfs with sudo owfs /etc/owfs.conf, it
works, mostly. If the directory remains empty, I try running owfs again and
then if by magic the directory populates.
Is owfs required to run on its own or is this done by owserver?
Yet it is really strange that owhttpd can see the directory structure, or
probably created its own.
This really does not make sense.
I have also posted this in the sourceforge discussion a couple of times and
have not yet received any help so I am posting here as well.

I would really appreciate some help on this.

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George Hills | 20 Aug 11:06 2015
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Hobby boards barometer (again)

Hi,

I’ve read the discussion about the new Hobby boards barometer from June and am wondering if there was a resolution?

I have the same barometer and see the same problem as previously discussed - the “pressure” and
“temperature” values are always the same.

If briefly unplug the barometer board from the bus, when it returns it shows a different value for both - but
that value then remains on every query.

I see the same result if I query /uncached/XX.XXXXXXXXXXXX/barometer/temperature (or pressure) - I
don’t think it’s a caching issue.

I have the value “9” in barometer/polling_frequency - if I try writing another value to it, it seems to
have no effect, and querying the polling_frequency again still gives the value 9.

This is using owfs 3.1p0 on a CentOS 7 box, which in other respects works flawlessly with a couple of DS9490Rs
running two busses with a couple of dozen DS1820s, Sheepwalk SWE3s, hobby-boards counters, etc.

I’ve put this query to Eric Vickery at Hobby Boards but it doesn’t sound like it’s something he’s
seen before.

Cheers
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Matthias Urlichs | 15 Aug 16:45 2015
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DS2409 vs. LinkUSB: ??

Hi,

I have an older 1wire network with a bunch of DS2409 (1st-gen HobbyBoards hub, 
among others). I just tried to replace a DS9490R with a LinkUSB interface. The 
result was … less than I expected.

# owdir
/1F.0CB204000000
[…]
# owdir /1F.0CB204000000/main
# 

… i.e., nothing. Duh? Known limitation?
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Jerry Scharf | 11 Aug 03:26 2015

has anyone played with CoAP

Hi,

I am looking for a higher level protocol to tie together a next 
generation system. I have gone through a number of possibilities and am 
now looking seriously at CoAP. It is an IETF internet of things protocol 
based on UDP. There are version for full capability nodes and well as 
arduino class nodes.

I was wondering if anyone has looked at using it and in particular 
connecting OW into it.

thanks in advance,
jerry

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Ekkehard Pofahl | 27 Jul 19:33 2015
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owfs-3.1p0 stucks on Raspberry Pi

Hello,

I used 2015-05-05-raspbian-wheezy.img for a fresh start. Nothing on
the Raspberry other than that image.

I describe what I did here :

https://sites.google.com/site/raspihs1/software/owfs/owfs

Version owfs-3.1p0 stucks :

.deps/ow_dnssd.Tpo -c -o ow_dnssd.o ow_dnssd.c
In file included from ow_dnssd.c:17:0:
../../../owlib/src/include/ow.h:302:20: fatal error:
libusb.h: No such file or directory
compilation terminated.

I could not find out, what screwed up. libusb.h ? What goes wrong ?

I went back one version : Version owfs-3.0p2 "makes" perfect. So I use
this version for the time being. I am quite sure I will not miss
anything.

Note : for me it was important to use USB. I had to do a little
research to find out how to get it (back).

Also I noted, that on http://owfs.org/ the search for "raspberry" does
not give back any result. However, Raspberry pages are definetely on
the web site, ;-) .

Best regards
Ekkehard

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Eric Baumann | 15 Jul 23:02 2015
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libusb header file

Dear Roland

Thanks for your reply. 

Sure, I would like to try these patches ! 

But excuse me for asking: What do I have to do with them?
Where do I have to put these lines? 

Here is what is interesting about this missing header file:

IT HAPPENS ON ALL MY MACHINES
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Eric Baumann | 9 Jul 10:57 2015
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libusb header files

Hi 

I run into the problem when building (sudo make) the owfs. 

In file included from getopt.c:32:0:
../../../owlib/src/include/ow.h:302:20: fatal error: libusb.h: No such file or directory
 #include <libusb.h>
                    ^
compilation terminated.
In file included from ow_dnssd.c:17:0:
../../../owlib/src/include/ow.h:302:20: fatal error: libusb.h: No such file or directory
 #include <libusb.h>


I has this issue already : 


I thought I had solved it:


But this is somehow not the case. 

I run into this exact same problem on both Ubuntu 14.04 and Raspbian. 


Meaning before running ./configure, 
I install: sudo apt-get update
sudo apt-get install automake autoconf autotools-dev gcc-4.7 libavahi-client-dev libtool libusb-dev libusb-1.0-0-dev libfuse-dev swig python2.7-dev tcl8.5-dev php5-dev i2c-tools
Any help would be greatly appreciated. 

Best regards,

Eric


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Gregg Levine | 5 Jul 01:54 2015
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Supported devices

Hello!
Can someone confirm or refute this statement?

OWFS supports all devices from the vendor (MAXIM once Dallas
Semiconductor) no matter how old, and even if they were discontinued
by them.

In this case I'm looking to support a (seemingly) 9V battery box via a
DS2436, the Windows (!!) software running inside a VM confirms that
the device sees the battery and of course all of ancillary details
associated with the device. This includes the voltage of the battery,
and the temperature of the associated setup, in degrees C as it
happens.

There's also graphing indicating a study on time versus voltage and
one for the same versus temperature. Plus user defined registers.
That's the original Windows (!!) software at work.

The setup would also include a bundle of DS2406s at work as well.

Paul, FYI, that is why the notes on the page with my name on it
include those four.

The final controller would be a Raspberry Pi with the current release
in its repository installed, but now its a pair of VMs running the
original software.
-----
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"This signature fought the Time Wars, time and again."

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Johan Ström | 3 Jul 18:40 2015
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DS9097U (DS2480B) re-configuration issues

Hi,

every now and then I've noticed how my DS2480B-based adapter on my lab 
network seems to stop responding. Restarting OWFS has always solved the 
issue for the moment.
TLDR: Shouldn't DS2480_big_configuration be called on comm failure?

Longer version:
---
The reset & Presence command works fine, but when it tries to send data 
to the network it fails:

   DEBUG: ow_select.c:(70) Selecting a path (and device) path=/uncached 
SN=00 00 00 00 00 00 00 00 last path=00 00 00 00 00 00 00 00
   DEBUG: ow_select.c:(84) Continuing root branch
TRAFFIC OUT <write> bus=0 (/dev/cua-labdesk)
--000: E3 C5
TRAFFIC IN  <NETREAD> bus=0 (/dev/cua-labdesk)
--000: E5
TRAFFIC OUT <write> bus=0 (/dev/cua-labdesk)
--000: E1 F0
TRAFFIC IN  <NETREAD> bus=0 (/dev/cua-labdesk)
--000: E5
   DEBUG: ow_tcp_read.c:(113) read: 1 - 0 = 1
   DEBUG: ow_bus_data.c:(38) Response doesn't match data sent

After some digging I've realized that it for some reason looses its 
configuration. Exiting OWFS and manually reading out the config 
registers gives me:

Written => Received
E3 => (nothing) ( go data mode)
C5 => CD (device present)
03 => 00 (read PDSRC; 15V/μs)
05 => 08 ( read PPD, 512μs)
07 => 08 ( read SPUD; 524mS)
09 => 00 ( read W1LT, 8μs)
0B => 00 (Read DSO/W0RT: 3μs)
0F => 00 (read RBR, 9.6kbps)
0D => 08 (read LOAD?, 3.0mA)

This is identical to the power-up configuration, and apparently does not 
work on my lab network. Most likely due to the 3μs DSO, which OWFS 
configures to 8μs on startup. Since my lab net is currently loaded with 
~300m of cable to the farthest slave, this is probably just too little 
delay.

The actual config-param-reset can be reproduced by just removing the 
power from the device. Why it actually reset I don't really know, if it 
is due to bad power, or something else..
---

The issue I'd like to address here is that OWFS does not seem to call 
DS2480_big_configuration to try to re-initialize the device, when it has 
repeatedly failed to communicate using it.
Where would this fit in?

Regards
Johan

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Gmane