Re: [Owfs-developers] Cable Length

Hi, I'm not sure what you are doing, but I have two long runs with 10s of 18b20s on at least a couple hundred feet of cat5. The way I do it is 1 pair for +5, 1 pair for ground and one pair that is out and back data lines to the punch down panel (I know it's a bus, but star wiring is way easie

Re: [Owfs-developers] To the people willing to look at what I am thinking about for control systems

all some > through the wall systems made by Hitachi and others that will provide > precise control in each room ( or portions thereof) and can be operated > by a 6 year old. > > So Why is your house so complex? Please explain in a few words what > the value is for this development

Re: [Owfs-developers] To the people willing to look at what I am thinking about for control systems

I'll make one public comment on this. OpenHAB is the exact opposite of what I am thinking of. I would describe OpenHAB as "You will write in Java, you will use our class structure, you will limit yourself to the interactions that we think are important and you will like it. We do." You can cert

Re: [Owfs-developers] To the people willing to look at what I am thinking about for control systems

Sent from my iPad > >> On Feb 7, 2016, at 3:39 PM, Jerry Scharf >> wrote: >> >> Hi, >> >> A while ago I had asked if anyone was interested in working on a new >> building automation control system. There were some who were willing to >> revie

[Owfs-developers] To the people willing to look at what I am thinking about for control systems

Hi, A while ago I had asked if anyone was interested in working on a new building automation control system. There were some who were willing to review and comment on it. I am going to avail myself of those kind people. Here is a problem statement that I wrote up about how to move to what I

Re: [Owfs-developers] Introducing a new "latesttemp" node on the DS18B20, DS18S20, DS1822, DS1825, and DS28AE00.

Hi, This would break my code. I send out simultaneous on each bus I have then come back around and read the values. jerry On 02/02/2016 04:06 PM, Stefano Miccoli wrote: I do not like the /simultaneous/temperature interface. As a general rule, owserver operations are synchronous: if you read

Re: [Owfs-developers] help me in building a next generation HVAC system

arely a life threatening issue. In very cold places, it is much more critical. Happy new year, jerry On 12/31/2015 11:46 PM, Jan Kandziora wrote: > Am 31.12.2015 um 21:59 schrieb Jerry Scharf: >> I've been lurking for a while. This isn't exactly 1-wire related, but I >>

[Owfs-developers] help me in building a next generation HVAC system

Hi, I've been lurking for a while. This isn't exactly 1-wire related, but I know a bunch of people on this list are interested in control systems. When I rebuilt my house, I put in a system that is a combination of residential and commercial design with much more controllability than would nor

Re: [Owfs-developers] RTD Slave

Colin, The reason I and most other people use RTDs is because they are more precise than a typical thermocouple or thermister. You need to do a good bit more than an LDO and a A/D to make the reader as/more stable than the RTD. Everything needs to be temperature compensated with careful circu

[Owfs-developers] 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 cla

Re: [Owfs-developers] emulating a sensor in owfs

Alex, The easiest way to do this might be to write a shim that reads/writes the modbus and presents like an owserver on the other end. That way, it would just look like a different bus to all the clients. You would need some kind of config that sets the 1-wire id and the like. How much of the

Re: [Owfs-developers] first build on beaglebone black debian

--i2c=/dev/i2c-2:ALL on the command line, it works. jerry On 06/13/2015 08:14 AM, Paul Alfille wrote: So is the problem the parsing of the line in the config file? On Wed, Jun 10, 2015 at 2:42 PM, Jerry Scharf <mailto:sch...@lagunawayconsulting.com>> wrote: Don't you hate i

Re: [Owfs-developers] first build on beaglebone black debian

all three. thanks, jerry On 06/09/2015 07:38 PM, Jerry Scharf wrote: > Hi, > > One more question. I got the server going, but it only saw 1 of the 3 > ds2482-100s. The I2C scan code shows all three devices. > > It looks from the log like it didn't even try anything el

Re: [Owfs-developers] first build on beaglebone black debian

-wire devices, it seemed better to have multiple masters. jerry On 06/09/2015 07:20 PM, Jerry Scharf wrote: > Hi, > > I just pulled a3.1p0 from sourceforge and am building it on a beaglebone > black w/ debian 7.8. I ran into some things I don't understand while > running configure.

[Owfs-developers] first build on beaglebone black debian

Hi, I just pulled a3.1p0 from sourceforge and am building it on a beaglebone black w/ debian 7.8. I ran into some things I don't understand while running configure. When I try to enable fuse for owfs, I pass it the include path. The test program blows up during compile with an undefined size_t

[Owfs-developers] what's a type 11 device

Hi, I am helping someone reverse engineer some power supply tips that use 1-wire devices to code them . Most of them read fine (ds2502 type eeproms,) but there is one from a dell 65W supply that comes up with a family 11 device when we try to read it. Does anyone know what this is and how to r

Re: [Owfs-developers] Temp Logging

On 03/30/2015 10:05 AM, Stefano Miccoli wrote: The only reason I can see is speed, and compatibility with (big) apps like cacti, nagios, or ganglia. S. On 30 Mar 2015, at 01:00, Colin Reese > wrote: Out of curiosity, why would you use this? Using a database with

[Owfs-developers] bus electrical questions

Hi, I'm in the thick of designing my test rig. It is now over 350 points mixed between thermocouples and 18b20s. I decided on 3 buses with ds2482-100s to handle this. These and some other things (I2C drivers and power) I need will sit on a beaglebone cape. Everything will be running at 3.3V I

Re: [Owfs-developers] another system design question, databases and flash

Spadim wrote: I dom't undestood the problem You will write how many times per second? What's the minimal period that you need? Maybe a compact file should solve this problem Em domingo, 23 de novembro de 2014, Jerry Scharf <mailto:sch...@lagunawayconsulting.com>> escreveu:

[Owfs-developers] another system design question, databases and flash

Hi, 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 microcontroller card is being updated several times a

Re: [Owfs-developers] 3.3V bus master

Colin, The BBB now ships with Debian, so it should be very close to the same thing. Could you share your recipe? thanks, jerry On 11/21/2014 03:03 PM, Colin Reese wrote: I can tell you for a Pi. I use the DS2483 extensively. C On Nov 21, 2014, at 2:48 PM, Jerry Scharf <mailto:

Re: [Owfs-developers] 3.3V bus master

.de>> wrote: 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

[Owfs-developers] 3.3V bus master

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? thanks, jerry

Re: [Owfs-developers] tty2usb

Hi, I haven't decided whether this is a good or terrible idea, so I'm just throwing it out there. If I know that a given 1-wire device serial number is on a given bus, can we use that for mapping things consistently. I am in particular thinking that some masters and switches have serial numbe

Re: [Owfs-developers] how many 18b20s on a bus

Nothing nearly that exciting. Hundreds of laptop power bricks. On 10/01/2014 11:05 PM, Roberto Spadim wrote: Well its a radio station? Or a sound amp? Em quinta-feira, 2 de outubro de 2014, Jerry Scharf <mailto:sch...@lagunawayconsulting.com>> escreveu: Hi, Thanks for all

Re: [Owfs-developers] how many 18b20s on a bus

Hi, Thanks for all the input. I am guessing my experience with slow reads is due to the long buses I have with my current setup. The bus will be very short because all the load resistors are on a rack with water cooled heat sinks. I can make the main power and ground lines any gauge I want, an

Re: [Owfs-developers] how many 18b20s on a bus

use (i don't remember the owfs file > name) a option to convert all sensors at same time, but ensure a good > power supply and after read one by one without convert temperature > (the same owfs file do this) > > 2014-10-01 15:04 GMT-03:00 Jerry Scharf : >> Hi, >>

[Owfs-developers] how many 18b20s on a bus

Hi, I am looking at using 18b20s to measure some load resistors and a couple other things. This is for a large bank of unit under test. The thing is that there are 300 load resistors plus 20-30 other channels to track. Then again, if we do a second monitor point, that's another 300 sensors. >F

Re: [Owfs-developers] Limited Simultaneous Conversions?

Paul, I would like to +1 this ability. I have a couple buses that have more sensors than I would like because of physical limitations. I have regular stability problems with simultaneous reads. After reading this, I suspect that I am at the limit of the power available on the these buses for

Re: [Owfs-developers] patch: refactoring of src/man

Tomasz, This would need to be an option rather than the default operation mode. Not everyone can/will run owserver and friends from systemd. jerry On 06/05/2014 07:26 AM, Tomasz Torcz wrote: > On Tue, Jun 03, 2014 at 10:17:14PM -0400, Paul Alfille wrote: >> Tomasz, would you use dbus for system

Re: [Owfs-developers] New release 2.9p4

fano On 02 May 2014, at 16:30, Jerry Scharf mailto:sch...@lagunawayconsulting.com>> wrote: Paul, If all you are trying to do is loop detection, there are a couple ways I know to do it. The simplest way to do it is a "time to live" field like IP does it. S

Re: [Owfs-developers] New release 2.9p4

Paul, If all you are trying to do is loop detection, there are a couple ways I know to do it. The simplest way to do it is a "time to live" field like IP does it. Start it at some number (64 in standard for IP, but we would probably want it to be lower) and every time you forward it, decreme

Re: [Owfs-developers] Calibration of DS18B20 sensors?

Joris, I am only writing this because I am a geek and like to play with reading accuracy. The 18B20s are not precision temperature sensors and should not be relied on to given anything better than .5-1C accuracy and .25-.5C repeatability. There is more than just a single calibration run that g

Re: [Owfs-developers] ow* Output - leading spaces trimmed?

Michael, I agree with Paul on this. I think it is wrong to make a change to the existing behavior for this kind of reason. The law of least surprise says that what people have seen as OWFS output for the last decade should be the default way it continues to output things. It's not a question o

Re: [Owfs-developers] AC amps sensor

Here's one: http://www.ibuttonlink.com/products/ms-tc It looks like it's a 20A version, but you should be able to change the coil and go to 30A. They say it is not calibrated but gives in the 3% range for accuracy, which is about what I would expect. If I were serious, I would calibrate each on

Re: [Owfs-developers] wireless dash7

nd what do the device addresses look like? (I'm >>> trying to think of the command line format). >>> >>> Paul >>> >>> >>> On Tue, Jan 28, 2014 at 3:55 PM, Jerry Scharf >>> wrote: >>>> Paul, >>>> >>>

Re: [Owfs-developers] wireless dash7

resses for each node? OWFS depends on uniquely identifying nodes, and some means of self description (via family code for most devices, sometimes with on-chip further specifics). On Tue, Jan 28, 2014 at 2:29 PM, Jerry Scharf <mailto:sch...@lagunawayconsulting.com>> wrote: Hi

[Owfs-developers] wireless dash7

Hi, In the talk about wireless connection, no one mentioned Dash7. I am solving a different problem and looking at it Dash7 seems to be the perfect solution. It has longer range, low power, message based transmission and location ability. It seems like the ideal package for remote sensors. And

[Owfs-developers] looking for programming help on my next generation control system

Hi, Sorry this is a bit off topic and I hope people don't mind. I have created a home control system that I affectionately call the "No Sane Person" home heating and control system. I have very sophisticated control capabilities but am running it in a really simple mode right now. I don't want

Re: [Owfs-developers] Diagnosing disappearing devices & adapters

Converting names to IP addresses happens as part of what the lower level system libraries do when a connection in requested. There are two ways to get this to work. I am assuming you are running this on some form of *nix type system. There is a file called /etc/hosts to which you can add names

Re: [Owfs-developers] Best way to pot a temperature sensor

I think you may have a misunderstaning of the way these sensors work. One adapter can cover many sensors. As I said, you only need to the long run to a connection box near the water, then connect the sensors serially inside the box. jerry On 12/09/2013 01:35 AM, Håkan Elmqvist wrote: Thanks

Re: [Owfs-developers] Best way to pot a temperature sensor

Hi, A few thoughts on this. First, I agree with the post that the wire is suspect. Standard telephone wire is not rated for salt water submersion and will probably fail in the time frames you see. They make cables with specific jackets and gel filling that are designed to go in these conditio

Re: [Owfs-developers] How can I get simultaneous temperature readings to work?

One more thing. I also do uncached reads of a rom fixed value like address to account for the actual bus transaction time. This gives a lower bound on how fast things can go. jerry On 10/10/2013 10:08 AM, Jerry Scharf wrote: > Hi, > > Are these 18s20s? I am used to seeing higher reso

Re: [Owfs-developers] How can I get simultaneous temperature readings to work?

Hi, Are these 18s20s? I am used to seeing higher resolution on the temperature from 18B20s. You can actually take the sleep out of there. The first read will stall until the conversion completes and then the rest will happen at the bus transaction speed. I always used the uncached directory w

Re: [Owfs-developers] owfs via serial device server stability

Michael, What operating system are you working on? jerry On 10/02/2013 05:19 AM, Dr.Michi wrote: > Dear owfs-community, > > We have a setup, where we have a serial owfs device mounted via a device > server (nport fom Moxa, using their npreal driver). That works OK. > > But if we power off the d

Re: [Owfs-developers] MultiMeter Type Device

Eric, Here is my $.02 input. For voltage, I typically need 10mV to 200VDC and 50mv to 500VAC, true RMS is a good thing. For current, I typically need need 1mA - 10ADC inline, 20mA-10AAC inline and 20mA to 75A with an inductance coil. As for channels, it depends on the use. If I am going to put

Re: [Owfs-developers] OWFS question

Ryan, Machine 2 has the access to the 1-wire information via owserver. It would be up to some program on machine 2 to store the information, just as it if you have a 1-wire adapter connected to machine 2. owserver can be thought of as a proxy for access to the 1-wire devices on machine 1. je

Re: [Owfs-developers] "85"

Daniel, 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 sight says they should have used the extra

Re: [Owfs-developers] Water/Moisture Sensor?

hat you will be doing major surgery to dry the compartment and solve the water ingress issues?" Absolutely right. Thank you, Peter On Sun, Jul 7, 2013 at 12:18 PM, Jerry Scharf <mailto:sch...@lagunawayconsulting.com>> wrote: On 07/06/2013 08:40 AM, Peter Hollenbeck wrote: &

Re: [Owfs-developers] Water/Moisture Sensor?

On 07/06/2013 08:40 AM, Peter Hollenbeck wrote: > 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

Re: [Owfs-developers] My first 1-w circuit - Was: Monitoring AC power lines

Hi, With a sleep in the loop, this is what I think most people do. There is an engineering compromise that balances the speed of discovery, the number of devices and the bus and processing capacity. How quickly do you need to find the new iButton? jerry On 06/04/2013 05:17 AM, Giulio Carabe

Re: [Owfs-developers] Monitoring AC power lines

Giulio I could go into a long discourse about measuring AC, but the simple truth is that this is something to be taken very seriously. Since you say there are high currents involved, it is a completely lethal situation as well as a potential fire risk. Unless you are completely sure of what y

Re: [Owfs-developers] anyone using a beaglebone black with 1-wire

hat is > increased to 8 ports. I am currently testing that and very impressed so > far. Similar prices. > > On 27/04/13 07:35, Jerry Scharf wrote: >> Hi, >> >> In an article I was reading, it mentioned the new beagleboard black >> system. It seems nice and it has t

[Owfs-developers] anyone using a beaglebone black with 1-wire

Hi, In an article I was reading, it mentioned the new beagleboard black system. It seems nice and it has this system for plugging on "capes" onto the base processor through a pair of headers. One of the capes is an 8 port 1-wire bridge. I was thinking this could make a nice ethernet server for

Re: [Owfs-developers] owserver - getting TCP returnvalue ffffffb6, what does that mean?

It might be very instructive to set up a connection between an OWFS instance and owserver and watch what it does. So when you want to do a temperature read, do it from owfs first and watch what comes up on your sniffer, them emulate that. I know that's not the same as having a protocol document

Re: [Owfs-developers] 18B20 Calibration

On 01/24/2013 11:22 AM, Phil White wrote: > Hi All, > > I have 30 temperature sensors sitting in front of me at the moment. > They all report different readings when queried - which I would like > to fix on a reasonably permenant basis. > > Can someone advise how I go about calibrating them? There

Re: [Owfs-developers] owfs performance with DS9490

Paul, I do not know how others would imagine doing this, but I thought a bit about how that could be useful to me. My imagination is that I I would set up the polling via the comm channel so I can add, list or remove polling tasks. I would have the program sleeping on input from the channel

Re: [Owfs-developers] 1-Wire Presence Pulse

Phil, As has been said, there is no true alarm interrupt. There are some chips that can have high and low alarms and a polling mode that only sees alarmed sensors. Still, it is not worth it for me. The cost of doing the actual polling for 30 sensors is fairly low if you first send a simultaneo

Re: [Owfs-developers] i2c DS2482 and VGA

Patryk, very cool. I need to ponder how to solve the need for greater +5 power in a reasonable mechanical configuration. The rest could fit nicely inside the connector shell of the VGA connector. One question. Does the 2482-800 look like 8 different buses or one bus plus a switch? If I send a

Re: [Owfs-developers] Temp sensor outside

Todd, They make solar radiation shields that look like a bunch of white upside down cone segments. They let air pass through but block the sun, rain from hitting the sensor. Here is a picture of one: http://www.youngusa.com/products/2/11.html and here are links to a bunch of home made ones:

Re: [Owfs-developers] Best way to measure water content in flower pot?

worth the money, even if I buy a bunch of them. :) Others charge over $100 per sensor for the same function and similar accuracy. jerry On 03/17/2012 11:29 AM, Nathan Hurst wrote: > On Sat, Mar 17, 2012 at 10:38:23AM -0700, Jerry Scharf wrote: >> Mads, >> >> I prefer RF impe

Re: [Owfs-developers] Best way to measure water content in flower pot?

Mads, I prefer RF impedance measurements of total available water over the old tension or gypsum systems. This is where the research community has moved. My problem with the older technology is that it measures the instantaneous water availability rather than the soil stored water. You really

Re: [Owfs-developers] Extend OWFS to other Devices

Paul and Eloy, I don't have an opinion whether the external devices should be added to the main list in the long run, but given the potential cost of doing an directory listing, this may be a wise precaution. Having an /external directory for these may be the right way to go until we learn more

Re: [Owfs-developers] bash restart of process

Roberto, Assuming you are running on some kind of *nix, why not use cron to do this? You would create a crontab entry that looked like: */5 * * * * /path/to/restart/script (if there is only a global crontab file, the entry would look like */5 * * * * owhttpduser /path/to/restart/script) then the

Re: [Owfs-developers] DHT11 Sensor

On 02/03/2012 02:16 PM, p4trykx wrote: > Dnia 03-02-2012 o 22:47:26 Mick Sulley napisał(a): > > I was also thinking about this sensor it has a digital output which can be > connected to uC. There is also DHT22 which has greater range. From what I > read these are based on a capacitor which capacit

Re: [Owfs-developers] Hubs

Mick, The problem with 1-wire is that it is has "single ended" data communications signaling vs. "differential" in rs485 or ethernet over cat5. If you have the differential on a single twisted pair, the signal will be very resistant to external noise. With single ended systems, noise is always

Re: [Owfs-developers] 1Wire Vibration Sensor

Sorry, I had to jump in. Accelerometers are not good at measuring vibration. Accelerations are measured instantaneously and are designed to operate above the noise floor of the sensor. The accelerometers have filters to remove the noise to give less erratic readings. The filters are a best gue

Re: [Owfs-developers] WRT54G Basics Question

On 01/07/2012 04:35 PM, Peter Hollenbeck wrote: > Ah. I am beginning to get it. I could run owserver and owhttp on the > WRT and access the data from 192.168.1.xxx:. Correct? Or I can use > your rrd method. I had never heard of rrd. I read a bit and will read > more. > Isn't it amazing. I am

[Owfs-developers] problems with latest version of owfs

Hi, I am banging away on my new system, and through I would upgrade owfs versions on general principal. I am now having some problems. here's my owfs command /opt/owfs/bin/owfs -m /var/1wire/mount --allow_other -s host:2840 --error_print=0 --error_level=2 --foreground > dlog 2>&1 ls /var/1w

[Owfs-developers] a change in owfs file system layout, is this right?

Hi, my set up has an owserver that talks to a serial linkhub and a ethernet linkhub. I then connect to the owserver from owfs. In the old version, the file system has a directory bus.0 for the owserver and under that bus.0 and bun.s for the two linkhubs. In each of these lower buses, there is

Re: [Owfs-developers] would like opinions on how best to design something

Mike, I like reliability for my house for an important reason. Whenever it breaks, my wife points out to me that if we had bough a regular system this wouldn't be a problem. :( I tried X10 for some other stuff, and think is just a terrible solution for almost anything. The X10 lighting is the thi

[Owfs-developers] would like opinions on how best to design something

Hi, I'm finally finding some time to write the next generation of my home control system. I have had a number on control ideas I have wanted to try out, and it is time to give them a try. The control and sensor plant in my house is close to ridiculously complex. One fun thing is that I am getting

Re: [Owfs-developers] Dreaded 85 degrees C read from DS18B20 located outside

Eloy, Neither shrink wrap or standard cat 5 jackets or insulators are impervious in general. This is generally measured with water at pressure. Impervious jacket cables are available, and many of them also have goo inside to prevent lateral moisture travel in the cable. IMO, the easiest thing

Re: [Owfs-developers] Un-Mounting 1-wire

Just kill and restart owfs and it will do what you want. On 02/28/2011 09:03 AM, Mick Sulley wrote: > Hi, > > I use the line > > /opt/owfs/bin/owfs --allow_other -C -d /dev/ttyUSB0 -m /var/1-wire/mnt > > to mount my 1-wire network so that I can read it with owfs. If I detect > a problem with it I

Re: [Owfs-developers] Crash accessing memory

Jim, Does anything else in the directory hierarchy return good data? If not, this may indicate that the fuse data access functions are broken. In other things work, then it is more likely something in the owfs code. owhttp does not depend on fuse, so it will check the lower level access to the

Re: [Owfs-developers] 1wire slave codebase (AVR)

Given that most of these devices are not so likely to have 4B created over their lifetime, would you be willing to allow the device designer to designate more bits of subtype (subsubtype) to identify functional capability within the device? This would be purely the choice of the designer. As a

Re: [Owfs-developers] Better directory listings.

search. Is that likely to happen in your > situation? > > The directory retries actually matches the behavior of read and write. > While adding a configuration option would be easy, do you think it's > really needed? > > Paul > > > On Fri, Mar 19, 2010 at

Re: [Owfs-developers] Better directory listings.

Paul, Would the directory retries block other action on OWFS? I would not want to slow down other functions on the net to do reties for this in my case. If it would potentially cause delays, I would prefer it be a compile or runtime option. thanks, jerry Paul Alfille wrote: > Based on feedbac

Re: [Owfs-developers] My wish list for implementing Intelligent Slave Devices

Paul, I wasn't so much thinking about what was right but looking at generalizing what OWFS does today. How do you convert from the data reading on a 18B20 to a temperature? Same goes for a humidity level or a thermocouple reading. It seems like you have readings you get back, and by knowing th

Re: [Owfs-developers] My wish list for implementing Intelligent Slave Devices

Jim, I like your idea. I think your example needs to be more like: create the filename "temperature" read a 16 bit int at address x push it through transform table q that outputs a float output the float with the printf string %s. This assumes that the transform is done on the OWFS side rather t

Re: [Owfs-developers] My wish list for implementing Intelligent Slave Devices

hip without > having to invest in a microprocessor programming environment. This > isn't strictly required, but it appeared to be fairly doable, and thus > I proposed it :) In a production environment, one might want to have > a second OW network for testing and programming the chip.

Re: [Owfs-developers] My wish list for implementing Intelligent Slave Devices

Jim, You are closer to my view of control systems. I generally want susbsystems to be able to act autonomously with the brains doing the more complex work. So it's more like a hierarchy than a pure mesh. I also think about redundancy. Just because 1wire is low cost doesn't mean it can't be use

Re: [Owfs-developers] Announcement for a new 1-wire slave device BAE0910

Hi, I come from a different world, that of communications protocols, so I have a different bias. I understand and agree with your desire to expose as much as possible from a device designer's point of view. I am more from the system designer side and want to have things be the most consistent

Re: [Owfs-developers] Announcement for a new 1-wire slave device BAE0910

Sorry to be blunt, but this is exactly what I want to avoid. Just because you are implementing your DAC in one form doesn't mean that others will. We need to have a common model that allows OWFS to present a rational access model to differing implementations of the same functionality. That's th

Re: [Owfs-developers] Announcement for a new 1-wire slave device BAE0910

I have a few thoughts on this. First, I would love to see a model for DAC as well as PWM for output. A simple two double byte model with a 16 bit set for signed output and 16 bits for log gain. Clearly there is nothing that you are going to hook to a 1-wire bus that is capable of this kind of p

Re: [Owfs-developers] simultaneous temperature reading with hubs

e hvac. My current router (asus wl500g deluxe) doesn't have a real > time clock so I need the internet at boot time just to get the time > for my hvac system to work. > > Thanks for your help > > On Wed, Jan 27, 2010 at 6:30 PM, Jerry Scharf > wrote: >> Sophana, &g

Re: [Owfs-developers] simultaneous temperature reading with hubs

owfs on top of owserver limit parallel access to the values? > Should I try directly with threads inside my python program to access > owserver in parallel? > > Thanks > > On Wed, Jan 27, 2010 at 5:10 PM, Jerry Scharf > wrote: >> Sophana, >> >> I am sure thi

Re: [Owfs-developers] simultaneous temperature reading with hubs

Sophana, I am sure this works. I have a hub (not a switch) and do simultaneous reads for my 30+ temp sensors. Do you have separate power or are you running in parasitic mode. I am fairly certain you can not do simultaneous reads with parasitic power. jerry Sophana K wrote: > On Mon, Jan 11, 2

Re: [Owfs-developers] 1wire control devices -Analog or PWM outputs

I've been a long time lurker. I run 30+ sensors in a heating & hot water control system, combined with a 422 setup to do all the relay and D/A work. I use link-hubs for the bus masters (one serial, one ethernet.) Someday I will do the final Ruby on Rails/Postgresql interface and put it out on t

Re: [Owfs-developers] Linkhub-E

gt; >> Paul >> >> On Jul 3, 2009, at 10:32 PM, Paul Alfille wrote: >> >>> Thank you, this is helpful. >>> >>> You solution is the most general. It does require two reads for every >>> transaction, since there seems to be escape codes somewher

Re: [Owfs-developers] Linkhub-E

Matthias, I thought about mentioning that, but I know the xport will never need to escape an FF because the overlaid protocol is true ascii. jerry Matthias Urlichs wrote: > Hi, > > Paul Alfille: >> Using a "proper telnet client" sounds like added dependencies and >> libraries, unless anyone ha

Re: [Owfs-developers] Linkhub-E

tial handshake will show the extra character > string, and I'll just look for it in every transaction after that. > > Paul > > On Fri, Jul 3, 2009 at 3:52 PM, Jerry > Scharf wrote: >> Paul, >> >> Bang on target and a great thought. >> >> I dust

Re: [Owfs-developers] Linkhub-E

and I'll just look for it in every transaction after that. > > Paul > > On Fri, Jul 3, 2009 at 3:52 PM, Jerry > Scharf wrote: >> Paul, >> >> Bang on target and a great thought. >> >> I dusted out the telnet RFC (I haven't looked at it in a dec

Re: [Owfs-developers] [Fwd: LinkHub-E debugging]

Paul, Yes, it is working fine. It was a set and forget thing as far as I could see. I have no insight into the problem being seen. jerry Paul Alfille wrote: > Jerry, hello again. > > Is your Linkhub E still working? I have a new user that is having > problems, and accessing his machine (over t

Re: [Owfs-developers] Linkhub-E

Paul, Bang on target and a great thought. I dusted out the telnet RFC (I haven't looked at it in a decade or more) and the receiver should be able to filter on anything that is FF FA ... F0. Brings back old memories. jerry Ziggy wrote: > The FF fx hex sequences look like telnet IAC sequences

Re: [Owfs-developers] HA7NET experience?

Thomas, I have a LinkHub and a LinkHub-E. Both work very well from my Linux system. Why do you want to know from the LinkHub which device is on which segment? Do they move around? I have always considered the hub model superior to the switches just because my sensors don't move and its a whole

Re: [Owfs-developers] Connector types vs connector types

Standards??? The only standards are the signals on the wires. Nothing says the wires need to be twisted, but that's how cables come so everyone does it. I wasn't able to find out when Dallas released their first interface unit, but it is likely before the home ethernet explosion. They didn't n

Re: [Owfs-developers] Crashing owserver

Michael, Any chance your java app is opening connections but not closing them? It's just guess, but I've made this mistake before. jerry Michael Weber wrote: > We have the following problem here: > > When accessing an owserver (connected via a ds2480 rs232 device), we > have at first very good

Re: [Owfs-developers] Measure moisture in woodchip

How about a simple minded way? Have a mechanism that loads and empties small samples onto a plate/strain gauge scale in a small leaky oven. Take an initial weight, run the oven to 120C and see what the weight asymptoticly approaches. The difference in weight is the definition of moisture conten

Re: [Owfs-developers] [Fwd: LinkHub-E debugging]

Marcus Babzien wrote: > Hello, > Is everyone out there doing ethernet 1-wire conversions using an HA7NET? >The LinkHUB-E setup I'm using is very close to a plain vanilla > configuration, so I would would have thought someone had issues before. > -Marcus > Marcus, I didn't know what to say.

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