Re: [time-nuts] Soekris without a GPS receiver.
You need to do a console mode install on the system itself or you have problems - you can do a debootstrap on another machine and get going... but heres the thing - you need FreeBSD to use the Soekris appropriately. Otherwise you're using a 486 from 2001 just to cause yourself pain. All you need is FreeBSD Crochet - its not a tough process. Check it out, then immediately use the same tool to build yourself an image for the Beaglebone you should order :-) https://github.com/kientzle/crochet-freebsd Alternately, CF cards are HUGE now. I have a 16G in my Soekris and that's PLENTY big to run a full operating system on. Don't even have to do NanoBSD - although naturally, you'll pay for it in performance and memory use if you don't. NS On Fri, Jan 2, 2015 at 5:05 AM, Hal Murray hmur...@megapathdsl.net wrote: david-tay...@blueyonder.co.uk said: Chris, I completely agree with you. Were it possible to install a normal OS easily, I would have done so, but the device only has a CF card slot, and there is no secondary boot device, so you end up trying to install the OS on the memory stick image you have booted from, and this does not seem to work. ... I think the idea is that you do the install on some other system, using something like a USB to CF adapter. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
From: Chris Albertson I think if you re-install any normal OS out of the box it will have the standard NTP included. Just get Ubuntu Linux then it will have ntpd already setup. Without PPS there is little point in having a GPS. These questions are best asked in the NTP mailing list. http://lists.ntp.org/listinfo = Chris, I completely agree with you. Were it possible to install a normal OS easily, I would have done so, but the device only has a CF card slot, and there is no secondary boot device, so you end up trying to install the OS on the memory stick image you have booted from, and this does not seem to work. In any case, nanoBSD is specially designed to minimise writes to the CF card, as it lives in RAM and not on disk. This is done as the number of writes to a CF card is limited, and hammering it with all the normal OS writes might result in a rather short lifetime. Agreed on the GPS as well - it's the PPS which is required for precise time measurement. David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Hi I suspect that there are people on the Soekris list that could help you with an image for the box you have. Putting an OS image on it is not trivial, but it’s also not rocket science. It’s a bit easier with FreeBSD from the era that the box was new. Bob On Jan 2, 2015, at 2:49 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: From: Chris Albertson I think if you re-install any normal OS out of the box it will have the standard NTP included. Just get Ubuntu Linux then it will have ntpd already setup. Without PPS there is little point in having a GPS. These questions are best asked in the NTP mailing list. http://lists.ntp.org/listinfo = Chris, I completely agree with you. Were it possible to install a normal OS easily, I would have done so, but the device only has a CF card slot, and there is no secondary boot device, so you end up trying to install the OS on the memory stick image you have booted from, and this does not seem to work. In any case, nanoBSD is specially designed to minimise writes to the CF card, as it lives in RAM and not on disk. This is done as the number of writes to a CF card is limited, and hammering it with all the normal OS writes might result in a rather short lifetime. Agreed on the GPS as well - it's the PPS which is required for precise time measurement. David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
david-tay...@blueyonder.co.uk said: Chris, I completely agree with you. Were it possible to install a normal OS easily, I would have done so, but the device only has a CF card slot, and there is no secondary boot device, so you end up trying to install the OS on the memory stick image you have booted from, and this does not seem to work. ... I think the idea is that you do the install on some other system, using something like a USB to CF adapter. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Why not run the normal ntpd? Seems it would do what you want. I don't see how a PPS source can NOT be supported. I'm talking about just the 1Hz square wave signal, no serial data. Just like ntpd's type 22 clock. See this http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver22.html It is just a signal of the correct voltage, no data. Chris Albertson Redondo Beach, California == Chris, I would very much prefer normal ntpd, but that would mean rebuilding the entire OS, something I'm not capable of nor, to be frank, something I am prepared to put the time into learning how to do. As I mentioned in another post, it seems that unless NTPns recognises the GPS serial data, it does nothing with the PPS. At least that's how it appears. As I'm sending NMEA and not Motorola format GPS serial data, it ignores my PPS. I don't want to bother PHK with this as it's likely way in the past for him. Happy New Year! David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
I think if you re-install any normal OS out of the box it will have the standard NTP included. Just get Ubuntu Linux then it will have ntpd already setup. Without PPS there is little point in having a GPS. These questions are best asked in the NTP mailing list. http://lists.ntp.org/listinfo Chris, I would very much prefer normal ntpd, but that would mean rebuilding the entire OS, something I'm not capable of nor, to be frank, something I am prepared to put the time into learning how to do. As I mentioned in another post, it seems that unless NTPns recognises the GPS serial data, it does nothing with the PPS. At least that's how it appears. As I'm sending NMEA and not Motorola format GPS serial data, it ignores my PPS. I don't want to bother PHK with this as it's likely way in the past for him. Happy New Year! David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
From: Paul [] I've avoided asking why you're doing this because -- to misquote Yoda -- Do nor do not, there is only try But if you're not switching out the system clock it doesn't really seem like either a time-nut or ntp-nut project. ___ Thanks for your comments, Paul. The project arose partially because I was offered a net4501 and accepted as I had heard of its good reputation. So far, the best results in terms of reported NTP offset have come from Raspberry Pi systems running a non-tickless Linux. My previous FreeBSD system using the DCD line for PPS had to be converted to Linux, and is now not as good as it was, and perhaps similar in quality to non-tickless Linux on the Raspberry Pi cards. So in the interests of knowing whether the net4501 could be even more precise, and perhaps tying it in with a recently purchased LTElite card, and learning more in the process, is why I'm doing this. I hope that is within the remit of this group. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Can't you combine a few Internet pool NTP servers with a local 1PPS source? The Internet servers will name the seconds. Also if you really need a Motorola Oncore you can buy them for $20 on eBay. There is no shortage. I paid $18 with free shipping for a UT+ I run the UT+ and leave the Thunderbolt powered off most of the time because the power used by the TB is so high compared to the very modest power draw of the UT+ On Sat, Dec 27, 2014 at 10:05 PM, Mike Cook michael.c...@sfr.fr wrote: I have had a look at the NTPns package and I don’t think that you will be able do what you want without something naming the seconds. As you have GPSDO’s to give you UTC aligned seconds you may be able to use the voice time service TIM to help you manually set the system clock to the nearest sec and then just have the 1PPS on gpio to get align the seconds to UTC. I have done this and it works ok. However, you won’t get the upcoming leap second adjustment (my bet is on Jun 30 next year, but it could be pushed out to Dec31 ). If you are not using snmp, you will not be able to do monitoring either. I would be inclined to use NTP rather than NTPns as per http://www.febo.com/pages/soekris. I know that the 4501 has only 128Mb , but that is easily enough. Le 27 déc. 2014 à 10:56, David J Taylor david-tay...@blueyonder.co.uk a écrit : I have a Soekris 4501 running with NanoBSD and have got as far as adding the PPS/DCD/GPIO modifications to the hardware. NTPns itself is working, and the red LED is flashing as expected. I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. Is it possible to use just the PPS/DCD line on its own for the fraction of the seconds, or would I need one or other of those receivers to make it work? If it can be made to work, what are suitable configuration commands? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
From: Chris Albertson Can't you combine a few Internet pool NTP servers with a local 1PPS source? The Internet servers will name the seconds. Also if you really need a Motorola Oncore you can buy them for $20 on eBay. There is no shortage. I paid $18 with free shipping for a UT+ I run the UT+ and leave the Thunderbolt powered off most of the time because the power used by the TB is so high compared to the very modest power draw of the UT+ === Chris, Using a mixture of PPS and local servers is exactly what I was aiming for, but: - NTPns doesn't support my PPS source - for testing, using local servers alone, even the seconds don't get named correctly, even though NTPns shows they are being detected and one is even marked as SELECTED. I was thinking that my already purchased LTElite might be a suitable PPS source, and perhaps even be able to drive the net4501's clock (at some point in the future). Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
On Mon, Dec 29, 2014 at 7:02 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: Using a mixture of PPS and local servers is exactly what I was aiming for, but: - NTPns doesn't support my PPS source I don't understand this. But getting a compatible GPS seems reasonable to move forward. - for testing, using local servers alone, even the seconds don't get named correctly, even though NTPns shows they are being detected and one is even marked as SELECTED. This would be the part where I said reach out to PHK regarding NTPns. Getting back to the try -- I assume you've read http://www.febo.com/pages/soekris/. Notice that while the gpio results are a win over the serial port they're nothing to write home about although that may be because he used ntp rather than NTPns. [columns are host, refid, delay, offset, jitter] His Soekris numbers (presumably 10Mb ethernet): -tock.febo.com .GPS. 1.012 -0.117 0.499 +tick.febo.com .PPSC. 0.990 -0.052 0.729 My numbers (typical desktop with serial PPS talking to a dedicated ntp server also using serial PPS): *ntpa .GPPS. 0.179 0.003 0.003 Or the Raspberry Pi and its jittery network interface: +rPi1 .GPPS. 0.436 -0.006 0.036 So for a try you could build a low-latency, high-res time-stamper (per PHK) based on a 4501 but you can't get that precision out of the box so it's of limited practical use. It sounds like you want something practical but I'm not sure. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
On Mon, Dec 29, 2014 at 4:02 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: - NTPns doesn't support my PPS source - for testing, using local servers alone, even the seconds don't get named correctly, even though NTPns shows they are being detected and one is even marked as SELECTED. Why not run the normal ntpd? Seems it would do what you want. I don't see how a PPS source can NOT be supported. I'm talking about just the 1Hz square wave signal, no serial data. Just like ntpd's type 22 clock. See this http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver22.html It is just a signal of the correct voltage, no data. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Le 28 déc. 2014 à 08:16, David J Taylor david-tay...@blueyonder.co.uk a écrit : Thanks to Mike to his observations on the driver - using stock NTP would be easier except that as a Windows person I would be lost (or very slow and incompetent) at building a NanoBSD image myself). You don’t need to build NanoBSD, just the NTP app. If you can telnet/ssh (I use putty) to the box from a windows machine and ftp from the box, you can get the standard NTP tar file from ntp.org and do a configure / make. It will be worth the effort. My 4501s have all died, but they did make great NTP servers and don’t consume much power. The are fire and forget. I had uptime longer than a year. I still have 4801s running NTP under FreeBSD. If you want make/configuration aid, better to shift this thread to the ntp list. I was gifted the 4501, but I feel I may just gift it to someone who is interested! Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
On Sun, Dec 28, 2014 at 2:16 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: No, I haven't replaced the crystal. I was hoping to see how well it worked without. No better than any other system given similar environments. Would it work any better than the Raspberry Pi cards I am using today There are two functions: 1) The very high resolution discipline of the system clock. Doing this today one would use a capture or system that can be externally clocked. 2) Time transfer. That's not going to be any better than any other non-PTP system. The limitation is the network not the server. So the answer to the better than question is probably not enough to matter. Either in offset or jitter. (which seem considerably worse with the new tickless kernel than the self-compiled non-tickless one I was using before)? Implementation issues. Would it work better than a server running Linux? No. The net4501 had a good reputation in its time. But not for reasons recently discussed on ntp:questions. See item 2 above. The non-standard implementation of NTPns is putting me off. I don't believe NTPns is better enough at timekeeping to fret about. I've avoided asking why you're doing this because -- to misquote Yoda -- Do nor do not, there is only try But if you're not switching out the system clock it doesn't really seem like either a time-nut or ntp-nut project. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Hi You can use a PPS from any “on time” source. The PPS driver is the place to look / thing to use for this. The gotcha is that unless the PPS is indeed pulsing at the right time, it will not improve the performance of the NTP client / server on the box. Without something like a GPS / WWVB / DCF77 / Loran-C receiver you have a tough time knowing what is indeed on time. NTP in free run is likely better than 10 ms, so attaching anything less accurate than this will actually make things worse rather than better. In this case it’s accuracy you are after, not stability or repeatability. There are a number of cheap GPS gizmos on the auction sites for ~$20 delivered that will take care of your shortage of timing junk” (my wife’s term for fine timing hardware). For NTP there is no need for a fancy GPSDO, the raw PPS out of a good GPS is better plenty good enough. Be careful using the raw PPS from a GPS that is not designed for timing, it may not be up to the task. Yes there are also more exotic solutions like a free running cesium standard and a clock trip to calibrate it. Bob On Dec 27, 2014, at 4:56 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: I have a Soekris 4501 running with NanoBSD and have got as far as adding the PPS/DCD/GPIO modifications to the hardware. NTPns itself is working, and the red LED is flashing as expected. I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. Is it possible to use just the PPS/DCD line on its own for the fraction of the seconds, or would I need one or other of those receivers to make it work? If it can be made to work, what are suitable configuration commands? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Look at the bottom of this page refclock.htm http://doc.ntp.org/4.1.0/refclock.htm for a list a clocks that NTP can use. Some of them are GPS receivers. For example type 30 is the Oncore line of receivers and Type 20 is any generic NMEA GPS receiver, with is by far the most common type. There is nothing special about configuring a Soekis. It is just like any other system that runs ntpd. The top of the documentation pages is here http://doc.ntp.org/4.1.0/ntpd.htm On Sat, Dec 27, 2014 at 1:56 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: I have a Soekris 4501 running with NanoBSD and have got as far as adding the PPS/DCD/GPIO modifications to the hardware. NTPns itself is working, and the red LED is flashing as expected. I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. Is it possible to use just the PPS/DCD line on its own for the fraction of the seconds, or would I need one or other of those receivers to make it work? If it can be made to work, what are suitable configuration commands? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Look at the bottom of this page refclock.htm http://doc.ntp.org/4.1.0/refclock.htm for a list a clocks that NTP can use. Some of them are GPS receivers. For example type 30 is the Oncore line of receivers and Type 20 is any generic NMEA GPS receiver, with is by far the most common type. There is nothing special about configuring a Soekis. It is just like any other system that runs ntpd. The top of the documentation pages is here http://doc.ntp.org/4.1.0/ntpd.htm === Bob, Chris, Thanks for your answers, but as I mentioned, I'm using NTPns and not stock NTP. I appreciate the requirements for an accurate PPS source - this should be within a microsecond to start with, and then I may try a more accurate source (I have a couple of GPSDOs). Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
On Sat, Dec 27, 2014 at 4:56 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: I have a Soekris 4501 running with NanoBSD and have got as far as adding the PPS/DCD/GPIO modifications to the hardware. Did you replace the crystal? I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. I suspect you'd need to ask PHK. NTPns supports pps-api and it supposrts ntpv4 as a time source so there's hope but the a quick look at the driver specifics suggests that pps may not work without one of the two device sources working. I don't think you need an Oncore but you would need a minimum set of Motorola binary messages. Maybe you have a compatible Synergy device? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
Hi The last release I see of NTPns is from 2008. The notes are from 2005. That’s a *long* time in Internet years. Is this the release you are trying to use? There are a number of security (and otherwise) issues with NTP that have come up over that time period … PHK is in the middle of a re-write of NTP so you may have something more recent. Bob On Dec 27, 2014, at 3:16 PM, David J Taylor david-tay...@blueyonder.co.uk wrote: Look at the bottom of this page refclock.htm http://doc.ntp.org/4.1.0/refclock.htm for a list a clocks that NTP can use. Some of them are GPS receivers. For example type 30 is the Oncore line of receivers and Type 20 is any generic NMEA GPS receiver, with is by far the most common type. There is nothing special about configuring a Soekis. It is just like any other system that runs ntpd. The top of the documentation pages is here http://doc.ntp.org/4.1.0/ntpd.htm === Bob, Chris, Thanks for your answers, but as I mentioned, I'm using NTPns and not stock NTP. I appreciate the requirements for an accurate PPS source - this should be within a microsecond to start with, and then I may try a more accurate source (I have a couple of GPSDOs). Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
I have had a look at the NTPns package and I don’t think that you will be able do what you want without something naming the seconds. As you have GPSDO’s to give you UTC aligned seconds you may be able to use the voice time service TIM to help you manually set the system clock to the nearest sec and then just have the 1PPS on gpio to get align the seconds to UTC. I have done this and it works ok. However, you won’t get the upcoming leap second adjustment (my bet is on Jun 30 next year, but it could be pushed out to Dec31 ). If you are not using snmp, you will not be able to do monitoring either. I would be inclined to use NTP rather than NTPns as per http://www.febo.com/pages/soekris. I know that the 4501 has only 128Mb , but that is easily enough. Le 27 déc. 2014 à 10:56, David J Taylor david-tay...@blueyonder.co.uk a écrit : I have a Soekris 4501 running with NanoBSD and have got as far as adding the PPS/DCD/GPIO modifications to the hardware. NTPns itself is working, and the red LED is flashing as expected. I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. Is it possible to use just the PPS/DCD line on its own for the fraction of the seconds, or would I need one or other of those receivers to make it work? If it can be made to work, what are suitable configuration commands? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
On Sat, Dec 27, 2014 at 4:26 PM, Bob Camp kb...@n1k.org wrote: Hi The last release I see of NTPns is from 2008. The notes are from 2005. There are a number of security (and otherwise) issues with NTP that have come up over that time period ... NTPns is essentially unrelated to ntp.org NTP. All they have in common is the wire protocol and a PLL -- not buglists. It looks like David is trying to replicate John Ackerman's implementation of PHK's Soekris setup modulo the replacement crystal. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Soekris without a GPS receiver.
From: Paul Did you replace the crystal? I would now like to get NTPns working with that more precise timing which is available, but as I don't have an Oncore or a DCF77 receiver I am stuck. I suspect you'd need to ask PHK. NTPns supports pps-api and it supposrts ntpv4 as a time source so there's hope but the a quick look at the driver specifics suggests that pps may not work without one of the two device sources working. I don't think you need an Oncore but you would need a minimum set of Motorola binary messages. Maybe you have a compatible Synergy device? === No, I haven't replaced the crystal. I was hoping to see how well it worked without. Would it work any better than the Raspberry Pi cards I am using today (which seem considerably worse with the new tickless kernel than the self-compiled non-tickless one I was using before)? Would it work better than a server running Linux? The net4501 had a good reputation in its time. The non-standard implementation of NTPns is putting me off. I can't use the management tools I know and appreciate. No, I don't have Motorola binary messages to hand, just standard NMEA. The NTPns is version 7.4, I believe. Thanks to Mike to his observations on the driver - using stock NTP would be easier except that as a Windows person I would be lost (or very slow and incompetent) at building a NanoBSD image myself). I was gifted the 4501, but I feel I may just gift it to someone who is interested! Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
