Am 23.06.2013 17:55, schrieb Jan Kandziora:
Hi,
while playing with Pascal Baerten's BAE0911, I found owtcl is treating
all results from OW_get as C strings, which makes reading data with
embedded \0 chars impossible.
I made I minimal patch which uses the length information of OW_get
Hi,
owfs has an ingenious automatic branch selection mechanism for the
DS2409 MicroLAN coupler. A user application has to remember only the
path for a certain chip and owfs does all the pesky DS2409 switching to
reach that chip on the network behind the curtains.
This magic has two drawbacks.
Am 05.07.2013 23:12, schrieb Jan Kandziora:
Hi,
[...]
Attached is a related patch to modules/owlib/src/c/ow_2409.c which adds
to nodes auxselect and mainselect. Writing something to these nodes
selects the aux/main branch of a DS2409 without any meddling of the
automatic branch selection
Am 06.07.2013 17:40, schrieb Peter Hollenbeck:
I am building a 26 foot wood power boat. The bilge below the cabin and
afterdeck floor is 7 sealed water tight (hopefully) compartments. I plan no
inspection ports but would like a way to detect moisture. If there were an
appropriate sensor I
Am 07.07.2013 02:13, schrieb Peter Hollenbeck:
Stuart Island, British Columbia
Interesting idea.
Ocean water temperature here is about 10C and air temperature, when we are
here April through October, ranges from about 10 to 20. I will have to
experiment to see if the differential would be a
Am 07.07.2013 17:00, schrieb Peter Hollenbeck:
I like the idea of using cheap ICs. Can you suggest one for me to consider?
For your application, I cannot recommend any.
Kind regards
Jan
--
This SF.net email
Am 07.07.2013 17:24, schrieb Peter Hollenbeck:
Could I use leaf wetness sensors such as this:
http://www.hobby-boards.com/store/products/Leaf-Wetness-Sensor.html
Should work for a while, at least as long the bilge is dry. Once
seawater gets in contact with the board I think it has to be
Hello,
I found ascii properties like /simultaneous/single and $chip/alias
return -EINVAL when the string result is empty. I don't think this is
a useful behaviour as catching this error just for the empty string
case obscures real error cases happening in the layers below.
*This problem is only
Am 13.07.2013 20:21, schrieb Jerry Scharf:
The origin of 85 was that the original sensors were 8 bit and only went
to 85c and thus all 1s (FF)was an error. When the extended the range to
125c and the bits extended, the error value was already set and produces
the problem you have. Hind
Am 14.07.2013 13:10, schrieb Jan Kandziora:
I see currently owfs is unable to update the scrachpad RAM only, as it
would be neccessary to implement such a scheme. Paul, what do you think
about having a node which does the Write Scratchpad command, but
leaves out the Copy scratchpad command
Am 17.07.2013 12:17, schrieb Robert Conway:
I do have a couple of BAE910's however looking at the brain4home web site
development may of stopped for a while.
No, it doesn't. I have ordered a batch of Pascal's BAE0911 a short while
ago and working with him hitting the last bugs out of the
Am 17.07.2013 14:27, schrieb Robert Conway:
I also have the BAE911 however never connected it, I might try and get it
running on my RPi. Although will try the BAE910 first as I know how this
works on my Ubuntu server. Never tried it on my RaspberryPi.
Make sure to use at least owfs-2.9 and
Am 18.07.2013 23:43, schrieb Thomas:
Problem is:
-with PHP, I read null value... for uncached / cached
-with owhttpd: uncached is working fine and cache is giving Error: No such
file or directory
-with owfile system /mnt/1wire/uncached is working fine and cache is
null value
-with
Am 22.07.2013 10:49, schrieb Robert Budde:
So my question:
- What to look for? I2C or Onewire?
I'd look for I²C first. Hook up a scope and check if the rising signal
edges are edgy enough. I²C is picky about that. The transmission gates
in the PCA954x may round the edges
Am 22.07.2013 20:55, schrieb Jan Sennesael:
All these sensors are parasite powered.
Which temperatures are we talking about? At low temperatures, parasite
power will make the sensor warm itself up a significant amount. There is
no way this could be calibrated by the factory as the resulting
Am 22.07.2013 10:49, schrieb Robert Budde:
The first DS2483 is directly connected to the native I2C line (/dev/i2c-1)
of the Beaglebone Black. As far as I can tell, this setup works well as long
as I do not enable the I2C switch. When I enable the I2C-switch by using a
Device Tree Overlay it
Am 23.07.2013 19:09, schrieb Jan Sennesael:
I am mesuring on a copper tube (sensor attached with tie wraps so the flat
side makes a good connection).
The temps i am measuring are between 12 and 22 °C.
This is problematic because it's near to the ambient temperature. With
such a low temperature
Am 23.07.2013 21:46, schrieb Vajk Fekete:
You also must take into account the wiring. The wires go to the sensor, up
to the die itself, and are made of good heat conducting material.
I second that, in fact that should be the culprit.
Kind regards
Jan
Am 23.06.2013 17:55, schrieb Jan Kandziora:
Hi,
while playing with Pascal Baerten's BAE0911, I found owtcl is treating
all results from OW_get as C strings, which makes reading data with
embedded \0 chars impossible.
I made I minimal patch which uses the length information of OW_get
Hi Serg, Paul, all
I found another problem with owtcl's returning binary data. As soon the
result form owlib contains a 0xc8, the input is wrongly treated as
UTF-8. I made a patch similar to that of ow::put.
If you think it's ok I will commit it.
Kind regards
Jan
Index: ow.c
Am 12.08.2013 22:09, schrieb Jan Kandziora:
Hi Serg, Paul, all
I found another problem with owtcl's returning binary data. As soon the
result form owlib contains a 0xc8, the input is wrongly treated as
UTF-8. I made a patch similar to that of ow::put.
If you think it's ok I will commit
Am 25.09.2013 22:10, schrieb Klaus Weglehner:
There are about 15 DS18B20 mostly in a star topology.
This is near worst-case. You could make it only worse by having some of
these bus-powered. There is no way to have this working reliable.
If you can't help building a star because the sensors
Am 27.09.2013 01:40, schrieb Colin Reese:
How does one make use of this?
The simultaneous/single_ds2400? Simply by reading that node. But I gave
it only as an example what I had to do to make the whole thing work for
me. Batteries included wasn't good with the I²C hosts and my application.
Am 27.09.2013 08:24, schrieb Markus Gaugusch:
So my question is: How can I improve the power supply on my bus?
I feed +8V to my extra power lines and have a small 5V regulator at any
tap.
When powering devices through the bus cable, you have to take care the
ground level isn't lifted too high
Am 27.09.2013 10:04, schrieb Mick Sulley:
My network has a HobbyBoards 6 port hub and I have never got it to work
through that, don't know why.
simultaneous/temperature and simultaneous/voltage use the Skip ROM
command which addresses all chips on a bus segment simultaenously. After
that, a
Am 29.09.2013 11:22, schrieb Vajk Fekete:
The key piece of information is, that ds9490 uses the ds2490 chip. Which is
kinda discontinued by dallas/maxim. At a point they stated they have made a
huge lot that will last years, and stopped production. They may have
restarted production, or are
Am 29.09.2013 21:46, schrieb Markus Gaugusch:
I've now successfully used simultaneous command, but my bus has one
iButton DS18S20 (which does not have separate power pin)
Which package? Both the TO-92 and SO-8 packages have a Vdd power pin.
while the other
ones are 3-pin TO-92 with
Hi all,
I guess all of you interested in opto-isolating the onewire already know
the DS2480B datasheet and Thomas Rudolphi's circuits (for those who
don't, check http://home.kpn.nl/thomas_7/1wire/1wire_isolating.html)
Knowing these, I tried to make a real simple circuit for my own
projects.
Am 03.10.2013 22:33, schrieb Håkan Elmqvist:
I have a remote DS1820 that consistently reads exactly 85 degrees C,
both in cached and uncached modes,
Possible misunderstanding: there is no cached or uncached mode. OWFS
always caches sampled values. The difference between the two directories
is,
Am 05.10.2013 11:01, schrieb Mick Sulley:
I agree with what has been said, but a further question - the discussion
refers specifically to parasitic power, does the same not apply to
powered networks? I had always assumed that it did, just that powered
was faster, I am wrong here?
It's
Am 10.10.2013 22:17, schrieb Håkan Elmqvist:
To get a proper answer to that question you will have ask Paul Afille.
But my understanding is that owfs remembers that it recently has issued
a skip rom command.
If I understand the sources correctly: not Skip ROM in general, but
the time the
Am 11.10.2013 00:16, schrieb Mick Sulley:
Yes that is what I see as well. I have a hobbyboards hub and
simultaneous doesn't work for me.
You have to use the simultaneous subdirectory of the farest main or aux
bus you use. /simultaneous will only issue the command up to the first
DS2409, as
Am 01.12.2013 18:34, schrieb tatnat:
Should it show up already without VCC
The µC on that board will almost certainly only run on external power.
Kind regards
Jan
--
Rapidly troubleshoot problems before
Am 04.12.2013 16:40, schrieb Marcus Priesch:
so owfs has to send all bytes to DS2480B belonging to one
transaction with no delays larger than this timeout, otherwise
the id has to be inserted again ... is this posible in OWFS ?!?
Well, you have to make sure the owfs process isn't scheduled
Am 04.12.2013 23:12, schrieb Top-Dog:
I have also observed in other cases that the file
system disappears immediately after ow.init('u') is called.
Access to the onewire hardware is usually limited to *one* owlib
intance. When you have two or more, use owserver for the actual hardware
Am 05.12.2013 01:30, schrieb Top-Dog:
Hi Jan,
I have these entries in the directory /etc/modprobe.d/:
blacklist ds2490
blacklist ds2490r
Good.
What do you mean by 'one' owlib instance? Do you mean that every time I call
ow.init('u') in python I create a new instance even if I exit
Am 05.12.2013 21:08, schrieb Top-Dog:
Thanks for the explanations. I'm still a bit confused about how I'm meant to
use the python api though. If I don't mount the file system with 'sudo
/opt/owfs/bin/owfs --allow_other -u /root/EEPROM.../' then when I go
straight to python and do the usual
Am 07.12.2013 23:22, schrieb Top-Dog:
OK... but how do I read and write to an EEPROM page file if I can't access
the file structure of the 'sensor'?
You still don't understand. Owlib just offers a file *representation*
of the devices of the bus. The owfs tool presents this file
representation
Am 09.12.2013 18:23, schrieb Arne Raaen:
This is easily fixed by briefly disconnecting the LinkUSBi usb contact,
but the roundtrip to the cabin is 5 hours...
Most likely this is a problem either with the adapter itself or with a
USB hub inbetween. Check the kernel log with
# dmesg | grep
Am 09.12.2013 21:33, schrieb Arne Raaen:
As stated in the initial post, rebooting does not help.
(Doesn't it follow that removing and installing the usb modules
should not work either?)
I had the impression the system hangs *because* of the reboot. If it's a
coldplug issue (yes, such
Am 09.12.2013 21:53, schrieb Jan Kandziora:
I had the impression the system hangs *because* of the reboot. If it's a
coldplug issue (yes, such errors exists), removing the USB modules would
help, as it would help to *hot*plug the device.
Another idea in that direction: Are you sure
Am 09.12.2013 22:11, schrieb Arne Raaen:
The problem arose (probably) at a brief power failure, i.e. an abrupt
shutdown followed by restart once power returned.
Ok, given all the other suggestions this should mean the FTDI or LINKs
hardware is failing.
Anyway, try rmmoding the hcd modules.
Am 09.12.2013 22:13, schrieb Top-Dog:
And on the side, I can't open the file 'list' (at /settings/alias/list)
using sftp, but when I try ssh'ing into it I can open the file in nano (but
it's empty) and when I try to write to it I get 'Error: Operation not
supported.
This may be because
Am 11.12.2013 23:00, schrieb Bernd Lamparter:
the device is correctly connected. It shows up on the OneWireViewer from
Maxim.
With OWFS I tried versions 2.8p15 and 2.9p1 without success. I always see the
USB-connector, but not display controller.
What's the result of ls on the /uncached
Am 12.12.2013 00:02, schrieb Bernd Lamparter:
It shows the adapter:81.D7BB3000. Currently I don't have other 1-wire
devices connected.
That tells nothing. To check what's wrong, it's important to connect the
LCD controller, then read /uncached. When the 81. in the DS9490R
magically
Am 14.12.2013 09:05, schrieb Arne Raaen:
Hi,
I run Ubuntu 12.04, with the Ubuntu version of owfs, 2.8p13
lsmod does not show ehci etc. I guess this means usb is not complied
as modules in ubuntu??
Check with
$ zgrep /proc/config.gz USB_.HCI_HCD
Is there an equivalent to rmmod,
Am 27.01.2014 20:47, schrieb Colin Reese:
So how does a local owfs instance read a remote server and merge networks?
It does automatically. You can additionally see the remote branches as
separare bus.X/ directories if you like.
Kind regards
Jan
Am 10.02.2014 00:31, schrieb Colin Reese:
Well, I want a cheap, small, low-power, bullet-proof sensor node. I want
to be able to read loads of them, preferably in a developed, extendable
framework, from a central sensor gateway, at the moment an RPi-based
control unit. Nothing seems to meet
Am 10.02.2014 13:20, schrieb Colin Law:
On 10 February 2014 12:01, Vajk Fekete vaj...@gmail.com wrote:
I do not see what is the reason against the linux box. I do not think you
could get cheaper with an avr and Xbee than a tplink 703n,
http://www.ebay.com/bhp/tp-link-tl-wr703n
I presume
Am 22.02.2014 05:12, schrieb Robin Gilks:
I've been using 100mS between DS2413 write and DS2438 read on the old
Dallas s/w but even taking it up to 300mS I'm failing to read the correct
value with owfs.
Do you have any DS2409 bus couplers inbetween? OWFS will turn the
switches *every time*
Am 23.02.2014 07:16, schrieb Robin Gilks:
No couplers - hanging off the bus are 16x DS2413 switches and 3x DS2438
battery monitors which are used for measuring the output of a current
transformer and temperature.
How do you access the onewire, direct to USB-Serial or via the w1 kernel
Am 23.02.2014 19:26, schrieb Robin Gilks:
If you look back in the thread you'll see I'm using a USB9097 which is a
ch341 usb/uart and a ds2480b master driver combination.
I read that, but I had the impression you have a bunch of hardware so it
wasn't clear to me what you are actually testing.
Am 14.03.2014 14:09, schrieb Rob:
I am trying to make a punch clock with owfs and iButtons. Therefore I want
to call a link when a new iButton is put on the reader. When I look at the
owfs uncached directory, everything works as expected. An iButton is
detected immediately when put on the
Am 14.03.2014 15:07, schrieb Rob:
the vusb looks interesting! What I want to do is following: a user puts the
iButton on the reader. The id should be stored in a database, together with
the time (by using some Python).
Simply use Python::Tk and bind for keypresses. It's a little tricky to
Am 18.03.2014 21:12, schrieb Jan Sennesael:
Sadly it seems that the DS2409 is no longer available,
It's discontinued, so usual distributors don't list it anymore. You have
to ask around who has still stock. I bet there are millions somewhere
out there waiting to be used. Don't know where at
Am 02.04.2014 21:00, schrieb Jan Sennesael:
The UTP is approximately 45m long, cat 5e. I am using wire nr 1/2 for
gnd/+5V and 4/5 for 1wire/gnd (hobbyboard pinout). The sensor worked without
problems on the tree setup (with a diy usb master), nothing else has
changed.
The other pairs of
Am 13.04.2014 09:18, schrieb vermus:
I have DS9490R and 1-wire bus short circuit in logs.
Cable don't connected. What is this mean? How to test device?
A possible bug is a shorted DS9503 protective diode in the device. This
happens after static overvoltage on the bus line, e.g. wrongly
Am 14.04.2014 14:44, schrieb vermus:
vermus wrote
ps. Can you give a bus voltage from DS9490R ? In my case it ~ 1 Volt (3
and 4 pin), but AFAIK sensors on parasite power needs 3-5V...
i was right..
Typically, 1-Wire slave devices operate over the voltage range of 2.8V
(min) to 5.25V
Am 16.04.2014 10:04, schrieb Ors Tiszay:
But reading the DS2762 as if it was still connected:
# cat /mnt/owfs/1F.F96B0800/aux/30.4CF9B812/current
You are not reading the DS2762 but the cache. Do a
# cat /mnt/owfs/uncached/1F.F96B0800/aux/30.4CF9B812/current
instead.
Kind
Am 16.04.2014 11:12, schrieb Ors Tiszay:
Nor should the file system one the device is disconnected, but someone will
correct me on this if wrong.
Search ROM is a costly operation on most host adapters (with the
noteable execption of the DS9490, which handles it semi-automatically)
so owfs
Am 16.04.2014 18:04, schrieb Ors Tiszay:
I understand that search ROM is costly, but:
1. on reading uncached, owfs should, like you say, update its view on the
bus. Nevertheless, this does not seem to happen:
# ls -la /mnt/owfs/uncached/1F.F96B0800/aux/30.4CF9B812/
# ls -la
Am 28.04.2014 13:50, schrieb Johan Ström:
Mostly this has been working good, with reliable triggering of the
latch. However, one problem with pull-up based circuit is that I get
erroneous triggers if VCC disappears, for example due to a bus
disconnect,
So.. my questions would be:
a) what
Am 08.05.2014 17:23, schrieb Chris Green:
If I run owserver do I need owfs as well? As I said I'm very confused
The owfs program is the front-end for fuse.
Any of the programs
owfs
owtftp
owhttpd
owserver
...
and most of the language bindings (all not ownet) are mere frontends for
the
Am 09.05.2014 00:03, schrieb Stefano Miccoli:
If you chose option 2) you should start owserver and owfs, and you may start
also owhttpd and owftp.
Your owfs.conf file is correctly setup for option 2) and you can start also
owhttp and owftpd.
I second that, BUT Chris may NOT use --usb=ALL
Am 27.05.2014 18:20, schrieb Colin Law:
This might make a nice wifi remote 1-wire server if it gets off the ground.
https://www.indiegogo.com/projects/vocore-a-coin-sized-linux-computer-with-wifi
Well, actually no. Designing a base board for USB2.0 and Ethernet lines
is by no means simple.
Am 02.06.2014 21:27, schrieb Stefano Miccoli:
This target (which I would call rather call a sed hell) tries to
cope with a simple problem: the manpages contain '.so file' requests
which cannot be resolved properly by the man system.
Thank you for addressing this. Does it also fixes the
Am 03.06.2014 09:02, schrieb Stefano Miccoli:
Do you mean installcheck?
I was unaware of such a problem: both 'make check' and 'make
installcheck' do nothing in src/man, since no test suite is defined.
No, the checkinstall program which creates RPM and DEB packages just
from a Makefile.
Am 04.06.2014 04:17, schrieb Paul Alfille:
Tomasz, would you use dbus for systemd? And would you send 1-wire data that
way or just program control.
Looking at dbus, it certainly looks like 1-wire data could map to it
easily. I'm just not sure if it would be useful.
IIRC, dbus is
* far too
Am 11.06.2014 13:04, schrieb Paul Alfille:
Also, in the documentation about systemd, there was a long passage about
how the daemonizing should be done external to the program -- is that still
the recommended policy? I guess the early testing could help there.
Yeah, that's one of the key
Am 12.06.2014 12:38, schrieb Paul Alfille:
So can we have the situation where owserver waits for both
1. the USB device (say) to be available
2. a request to come in
and appear always available to the clients?
As systemd handles the socket connection (and process start) alone, I
think
Am 10.07.2014 03:29, schrieb Loren Amelang:
Except I ended up with a 10K resistor in parallel with the suggested
4.7K pullup, for 3197 ohms, before I actually got real readings.
This stinks the way the strong pullup is missing during temperature
conversion. See e.g. the DS18B20 datasheet, page
Am 10.08.2014 20:39, schrieb Pedro Côrte-Real:
I've now had 3 or 4 DS9490R adapters fail after bad weather. They
seem to be particularly susceptible. After I swap them out the whole
network is fine though.
They have a protective diode against lightning and other EMC inside, so
yes, that
Hi all,
I have problems with the network timeout in a system with multiple
owservers.
The x86 master and three Raspberry Pi are each one equipped
with a self-made (sources identical) Linux distribution running
owfs-2.9p0. They all have DS9490 host adaptors and all run owservers to
access it. On
Am 28.10.2014 um 15:06 schrieb Coudy:
If temperature sensor is powered, then reading is faster compared to
parasitic power ?
No, but it's the only way you can do a simultaneous conversion for all
chips, and this 19 times faster if you have 19 chips.
You cannot do a simultaneous conversion on
Am 29.10.2014 um 21:42 schrieb Coudy:
Thank You Jan,
I'll try to switch my sensors from parasitic power to regular power.
How to enable simultaneous conversion for all chips ?
this way ? echo 1 /mnt/1wire/simultaneous/temperature ?
Yes, this starts the temperature conversion on all buses.
Am 21.11.2014 um 19:56 schrieb Jerry Scharf:
Hi,
I am looking at using the MAX31850 chip for my test setup. It is a 3.3V
only device (will not take 5V on power.) Are there any bus masters
and/or switches that support 3.3V for the power and data lines?
I'd say, don't use parasite power,
Am 23.11.2014 um 09:13 schrieb Jerry Scharf:
I am using a flash only system to be the master of my system for testing
300 power supplies. I want to use a MVC database/web design. In a normal
disk based system, I wouldn't give the fact that the state of the each
power supplies and
Am 01.12.2014 um 07:16 schrieb Андрей Штых:
I have the following problem:
I connected to my raspberry pi to the LCD display. I used the bus master
1-wire DS2482-100. Next bus connected to it DS2408S and LSD display.
Compiled from source owfs 2.9p8, does not work at all. Any attempt to write
Am 08.12.2014 um 19:14 schrieb Csillag Kristof:
On 2014-12-08 18:35, Colin Reese wrote:
Check the datasheet. These parameters are well-documented.
I tried to.
I looked at http://datasheets.maximintegrated.com/en/ds/DS1921G.pdf
It does not seem to contain the word easystart.
From
Am 12.12.2014 um 12:03 schrieb joep:
The output of lsmod includes:
.
ds2490 6924 0
.
If you plan to use owfs with the internal libusb-based driver (--usb
option), you have to blacklist that module. A MUST!
You can use that module
Am 13.12.2014 um 10:54 schrieb joep:
Hi Jan,
I confirmed that by blacklisting the ds2490 module the
errors I was getting (before I did anything with owfs) stopped. I
blacklisted by including a .conf file in */etc/modprobe.d* with a
'blacklist' entry. After reboot the ds2490 was
Am 17.12.2014 um 18:06 schrieb Vasco:
I thought it depends on lack of magic sequence that can be sent to
chips to exit from test mode,
but if the chip is in test mode only P0
output does not respond; in my system when a chip does not respond, it
has the same behavior on all ports , not
Hi,
I just switched over to the sf.net git archive and I see no release
tags, 2.9p1 and so on. Shouldn't there be some?
Maybe you all just missed
$ git push --tags
?
Kind regards
Jan
--
Download BIRT iHub
Am 21.12.2014 um 15:16 schrieb Jan Kandziora:
Hi,
I just switched over to the sf.net git archive and I see no release
tags, 2.9p1 and so on. Shouldn't there be some?
Ok, I just sorted them all out by hand and pushed the whole list. So
don't wonder when you pull the archive the next time
Am 02.01.2015 um 16:08 schrieb Jan Sennesael:
Everything was running fine, but when i tried to add a couple of sensors i
run into some troubles: Since these sensors are on the other side of the
house, is added a long utp cat5e cable (long= 25m a 30m)
Don't use a pair for 1W and GND, as the
Am 03.01.2015 um 09:49 schrieb Jan Sennesael:
@Jan: now i'm a bit surprised, since maxim themselves talk about using
cat5(e).
Where? If yes, they forgot about all they've written in various
application notes before.
In my own experience, plain flat telephone wire is the best.
Of course the
Am 04.02.2015 um 09:23 schrieb Torrini, Eugenio:
We are using Owfs in Linux to access a DS1991 and DS1995 through the USB
DS9490R reader.
Everything is ok for DS1995.
For DS1991 we are not able to make it work. Maybe we are doing something
wrong.
We know the password of the 3 pages of the
Am 11.02.2015 um 17:02 schrieb Lukasz Salwinski:
I see... I've been religiously inserting ds2482 module. Does it mean
I only need i2c_bcm2708 and i2c_dev modules ? Besides ds2482 (explicitly
inserted) modprobe also returns
That's correct. Owfs can (and with --i2c= will) directly talk to all
Am 11.02.2015 um 20:12 schrieb Colin Reese:
Why on earth would you bitbang a 2482 on a Pi when a perfectly good
i2c bus exists?
I beg your pardon?
Bitbanging *onewire* requires no additional chip and is done through a
configureable GPIO on the Raspberry Pi.
In addition, the w1 kernel driver
Am 10.02.2015 um 22:39 schrieb Colin Reese:
Wait, is that even possible? I thought w1 was for bitbanging on a GPIO,
having nothing to do with i2c.
There are w1 kernel drivers for ds2482, ds2490, bitbanging on a GPIO and
the synthesizeable ds1wm bus master.
CONFIG_W1_MASTER_DS2490=m
Am 10.02.2015 um 22:51 schrieb Lukasz Salwinski:
w1 is hardwired to GPIO4 so I'm using GPIO17 to control SLPZ; I can toggle
DS2484 on/off by setting GPIO17 to 1/0. it seems to be another indicator
i2c side works fine... it's that just nothing shows up on the 1-wire side :o/
lukasz
No,
Am 11.02.2015 um 20:39 schrieb Colin Reese:
I found the initial post of available methods confusing and
apparently misinterpreted your response.
Sorry, I should have used the serial comma.
http://www.verbicidemagazine.com/wp-content/uploads/2011/09/Oxford-Comma.jpg
Kind regards
Jan
Am 18.02.2015 um 08:23 schrieb Gregg Levine:
In it he writes that it needed a 4.7K pull up resistor to Vbat. Well I
found one and attached it. Same strange behavior as before. But what I'm
concerned with more is what are the rest of us doing with their parts? What
resistor value was selected
Am 18.02.2015 um 15:34 schrieb Martin Rapavy:
To add some technical details to my query: the bus master chip in
question si very similiar to DS1WM (which is something like
DS2482-800 but with memory-mapped registers, instead of I2C access).
After browsing the sources for some time I concluded
Am 18.02.2015 um 21:19 schrieb Martin Rapavy:
I was exactly in favor of avoiding w1 because of bus polling. It is
important for me not to use the bus frequently (the wire is also
shared for reading out data from sensors). Do you think that the w1
polling might be turned off using
Am 18.02.2015 um 21:58 schrieb Martin Rapavy:
Option C Memory-mapped IO from userspace, which is
*UGH!*. See module/owlib/src/c/ow/ow_ds2482.c for all the
things to write and change. The disadvantage is owfs has to run
as root to do MMIO.
I don't mind running under root. I suppose
Am 18.02.2015 um 23:07 schrieb Gregg Levine:
Hello!
He cited that the resistor was connected to the counter inputs to the
Voltage Battery input point.
However I'm more inclined to try your idea then his. Which is of
course what I'm looking for.
You certainly need a capacitor for
Am 19.02.2015 um 08:59 schrieb Martin Rapavy:
Hi Paul,
thanks for briefing me on the architecture of OWFS. My master chip
has almost exactly the same register interface as Dallas DS1WM
(http://datasheets.maximintegrated.com/en/ds/DS1WM.pdf). It only
differs in one register: Clock divisor
Am 10.02.2015 um 16:29 schrieb Lukasz Salwinski:
I've checked the connections, changed Vcc to 5V but 18B20s still does not
register :o/ DS2483 are on the way but in the I'm tempted to connect the
sensors directly to rpi just to see if they are ok...
Have you made sure the w1 driver is not
Am 12.02.2015 um 17:19 schrieb Lukasz Salwinski:
not loading ds2482 module did not help - the owfs filesystem is there:
Sorting that obvious error out:
Have you connected Vdd of the DS18B20 to GND? That's important if you
want parasite-power mode. But powering the chip with 5V would be
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