NTP Daemon for ASUSWRT/Merlin

[GoNz0]

This may show which ntp.conf.

ps ww|grep ntpd

GoNz0@Router:/tmp/home/root# ps ww|grep ntpd
 1106 GoNz0     4952 S    ntpd -c /opt/etc/ntp.conf -f /opt/var/spool/ntp/ntp.drift -s /opt/var/spool/ntp -k /opt/etc/ntp -l /opt/var/spool/ntp/ntp.log
 8230 GoNz0     1452 S    grep ntpd
GoNz0@Router:/tmp/home/root# ntpq -p
No association ID's returned
GoNz0@Router:/tmp/home/root#

The above showed the location but when I edited the other file with the same as the one residing in jffs it gave the No association ID's returned?

 

[GoNz0]

GoNz0@Router:/tmp/home/root# ps ww|grep ntpd
 1106 GoNz0     4952 S    ntpd -c /opt/etc/ntp.conf -f /opt/var/spool/ntp/ntp.drift -s /opt/var/spool/ntp -k /opt/etc/ntp -l /opt/var/spool/ntp/ntp.log
 8230 GoNz0     1452 S    grep ntpd
GoNz0@Router:/tmp/home/root# ntpq -p
No association ID's returned
GoNz0@Router:/tmp/home/root#

The above showed the location but when I edited the other file with the same as the one residing in jffs it gave the No association ID's returned?

So the file in JFFS isn't used, I deleted that.
ntp.conf works fine with entries for stratum servers but as soon as I remove those and just have a GPS ip it is ignored. The ip does ping so i'm still stumped.

 

[JGrana]

Just for kicks - RPi on OpenWRT can be self hosting, e.g. build the entire OS that it runs on - that's the advantage of the Pi over Arduino...

Nothing against arduino - it's a great platform... and I support it - and we see other items getting into the same IDE - e.g. ESP8266 and similar, it's a win...

When one sees Pi Zero W at $10USD, it's an attractive platform...

A Pi2/Pi3 can do the same - and support hotel services outside of NTP and GPS...

I tend to agree with sfx2000 in terms of adding a Raspberry Pi 3 as a fine network application platform. Over the years I have tried to use various Asus routers and Merlins fine firmware for various projects. Some worked great and some not as well...

In terms of packet processing applications (like FreshJR's Adative QoS project or thelonecoders's AB-Solution) my AC88U along with Merlins FW work great. I also use rsync to copy photos from my main floor PC to a USB disk hanging off the router.

But, when it comes to things like media servers or full capable NTP servers, adding an Rpi 3 hanging off the AC88u's ethernet switch makes a great network server co-processor.

You get the benefit of much more contemporary kernels (Asus/Merlin - Linux kernel 2.6.36 versus Raspian/Debian 4.9.35), much more free memory (~ 500K versus 1GB) and a full local development environment environment. The Entware guys do a great job in providing install able packages for Merlins FW, but lets face, almost anything is available with Debian's package.

I tried minidlna and ntpd on Asus. Too many photos caused minidlna to choke. As far as ntpd, lots of challenges getting my old Garmin GPS USB puck to work.
On the Rpi 3, I have Plex fully running and have the stock ntpd along with gpsd (GPS deamon) that provides a Stratum 1 clock for all my other Pi's and computers. It is also now in the pool.ntp.org. (Why Startum 1? Ahh, err, well I had a Garmin GPS puck that did PPS output and wanted to try to get it to work. Got it working so thats why ;-)

For the ~$50 for a Pi 3 ($35 for the Rpi, $15 for an SD card and USB power supply - you might even have these things laying around!) it makes a nice Network Co-Processor for the Asus router/Merlin FW.

My $0.02

 

[cmkelley]

Just plug the device into a regular computer w/ Ubuntu. Then, type dmesg. Your device could have a FTDI, CH341 or PL2303 USB-to-serial converter. This is not supported in AsusWRT. However, some have gotten it to work with libusb or libftdi, from Entware-ng.

Yeah, it's PL2303 - It started to dawn on me late last night that it's the converter that likely wasn't supported. I was going to ask Merlin, but now I don't have to.

My other option is to just attach it to my NAS4Free (FreeBSD) fileserver, and use that box for my time server. That has a pretty complete FreeBSD system, so I suspect it would be supported just fine. If this gets to be much more of a PITA, I'll probably just do that.

 

[GoNz0]

Just to add to my quest, installing ntpd on top of this daemon installs it to the wrong place so I decided to drop an updated copy of ntpd and ntpq over the originals and reboot, unfortunately gps is still not being picked up.

Dunno what to try next.

I did get rid of the refclock warning but introduced [refclock_open /dev/gps0: No such file or directory]
Either way I do not think this path will fix it as it seems more to do with the GPS not being picked up by the daemon even though I can get output.

 

[Fitz Mutch]

... refclock_open /dev/gps0: No such file or directory...

I think you just need to link /dev/gps0 to /dev/ttyACM0.

Just in case you're wondering about the strange IP address in ntp.conf, 127.127.20.0:

• the "127.127" tells the NTP server to use a refclock, not an Internet time server
• the "20" means driver#20, Generic NMEA GPS Receiver
• the "0" means /dev/gps0, where you could have more than one of these

It's all right here,
http://doc.ntp.org/4.2.8/drivers/driver20.html
http://support.ntp.org/bin/view/Support/ConfiguringNMEARefclocks

 

[sfx2000]

For the ~$50 for a Pi 3 ($35 for the Rpi, $15 for an SD card and USB power supply - you might even have these things laying around!) it makes a nice Network Co-Processor for the Asus router/Merlin FW.

Exactly... and keeping things off the router is a good thing - if code breaks a Pi, no big deal, easy enough to recover from, and only services that were hosted on the Pi would be impacted..

Code breaks on the router - that can be a pretty big deal - worst case, bricking the router, and at a minimum, it can cause an outage for the rest of the household while one is trying to fix things...

If one wants to keep things all Asus - there's the TinkerBoard - bit more spendy than a Pi3, but it has more to offer...

https://www.asus.com/us/Single-Board-Computer/Tinker-Board/

 

[GoNz0]

I think you just need to link /dev/gps0 to /dev/ttyACM0.

Just in case you're wondering about the strange IP address in ntp.conf, 127.127.20.0:

• the "127.127" tells the NTP server to use a refclock, not an Internet time server
• the "20" means driver#20, Generic NMEA GPS Receiver
• the "0" means /dev/gps0, where you could have more than one of these

It's all right here,
http://doc.ntp.org/4.2.8/drivers/driver20.html
http://support.ntp.org/bin/view/Support/ConfiguringNMEARefclocks

Well I have had a read and despite my lack of knowledge outside of the windows OS I have had a tinker but as we have the same dongle your settings should work, maybe it is because of the version bundles with this threads version so I will see if I can get it working with your other thread to sync the clock, at least then I will know if it is this version of ntpd.

 

[GoNz0]

I think I may have broken my GPS.
The output was clean originally with the GPZDA data, last night I tried to reverse the script to test back on my laptop, even running the original script to enable GPZDA results in garbled text below. any ideas?

It wouldn't let me save a backup, I think this was due to it using USB drivers on the PC instead of com port.

bugger.

GoNz0@Router:/tmp/home/root# cat /dev/ttyACM0
$GPTXT,01,01,02,u-blox ag - www.u-blox.com*50

$GPTXT,01,01,02,HW  UBX-G70xx   00070000 *77

$GPTXT,01,01,02,ROM CORE 1.00 (59842) Jun 27 2012 17:43:52*59

$GPTXT,01,01,02,PROTVER 14.00*1E

$GPTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*20

$GPTXT,01,01,02,ANTSTATUS=OK*3B

$GPTXT,01,01,02,LLC FFFFFFFF-FFFFFFFD-FFFFFFFF-FFFFFFFF-FFFFFFF9*53

▒6`x▒[$GPZDA,073926.00,25,07,2017,00,00*6B

▒6H|▒▒$GPZDA,073927.00,25,07,2017,00,00*6A

$GPZDA,073928.00,25,07,2017,00,00*65

▒6▒A▒$GPZDA,073929.00,25,07,2017,00,00*64

▒6▒▒$GPZDA,073930.00,25,07,2017,00,00*6C

▒6▒▒Q$GPZDA,073931.00,25,07,2017,00,00*6D

▒6Џȹ$GPZDA,073932.00,25,07,2017,00,00*6E

▒6▒▒▒!$GPZDA,073933.00,25,07,2017,00,00*6F

▒▒
GoNz0@Router:/tmp/home/root#

OK so the output via u-center shows it's ok and reloading as a com port allowed me to reset to default but I still get garbled text via the router.

 

[GoNz0]

I think you just need to link /dev/gps0 to /dev/ttyACM0.

Just in case you're wondering about the strange IP address in ntp.conf, 127.127.20.0:

• the "127.127" tells the NTP server to use a refclock, not an Internet time server
• the "20" means driver#20, Generic NMEA GPS Receiver
• the "0" means /dev/gps0, where you could have more than one of these

It's all right here,
http://doc.ntp.org/4.2.8/drivers/driver20.html
http://support.ntp.org/bin/view/Support/ConfiguringNMEARefclocks

I know you say it is all there but I don't speak that language so I am still stuck on this

refclock_open /dev/gps0: No such file or directory[/quote]

help

 

[Fitz Mutch]

I know you say it is all there but I don't speak that language so I am still stuck on this

refclock_open /dev/gps0: No such file or directory[/quote]

help

This will create the link, if it doesn't exist. The "0" in /dev/gps0 corresponds to the "0" in 127.127.20.0, in your ntp.conf.

/sbin/modprobe cdc-acm
[ -e /dev/gps0 ] || /bin/ln -s /dev/ttyACM0 /dev/gps0

 

[Fitz Mutch]

If one wants to keep things all Asus - there's the TinkerBoard - bit more spendy than a Pi3, but it has more to offer... https://www.asus.com/us/Single-Board-Computer/Tinker-Board/

WTF?
Access Denied
You don't have permission to access "http://www.asus.com/us/Single-Board-Computer/Tinker-Board/" on this server.
Reference #18.b902655f.1500986608.cb5a4ed


Does the Asus Tinker Board have a battery-backed RTC?

The Orange Pi Zero 512MB may be good enough for this job.
https://www.banggood.com/Orange-Pi-...source-512MB-Development-Board-p-1110210.html

 

[GoNz0]

This will create the link, if it doesn't exist. The "0" in /dev/gps0 corresponds to the "0" in 127.127.20.0, in your ntp.conf.

/sbin/modprobe cdc-acm
[ -e /dev/gps0 ] || /bin/ln -s /dev/ttyACM0 /dev/gps0

Thanks, I put that into putty but it was back on a reboot, do I need to put it into a script file?

 

[GoNz0]

Before I toss this in the bin, does anyone know why the ublox is now outputting garbage?
even a factory default didn't work, the text looks ok in the text console of u-center, it did look ok via the router until last night when I tried to edit a setting with it installed as a sensor and not a com port and after that I get this

GoNz0@Router:/tmp/home/root# cat /dev/ttyACM0
▒▒ ~▒▒3++
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▒bHW  UBX-G70xx   00070000 ▒;$GPTXT,01,01,02,HW  UBX-G70xx   00070000 *77

▒b*ROM CORE 1.00 (59842) Jun 27 2012 17:43:52H▒$GPTXT,01,01,02,ROM CORE 1.00 (59842) Jun 27 2012 17:43:52*59

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[sfx2000]

Does the Asus Tinker Board have a battery-backed RTC?

The Orange Pi Zero 512MB may be good enough for this job.
https://www.banggood.com/Orange-Pi-...source-512MB-Development-Board-p-1110210.html

Not sure why the TinkerBoard link was bounced - bad cookie maybe?

RTC can be added via GPIO's, just like RPi...

The Orange Pi would be an alternative perhaps - it doesn't have the depth of community support that the RPi does, but depending on needs...

 

[GoNz0]

Had to short the onboard battery to properly reset it, this has stopped the garbled text.
I think it is a rom based chip as I cannot flash the new firmware either.
Any progress is progress!

Before I toss this in the bin, does anyone know why the ublox is now outputting garbage?
even a factory default didn't work, the text looks ok in the text console of u-center, it did look ok via the router until last night when I tried to edit a setting with it installed as a sensor and not a com port and after that I get this

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[Fitz Mutch]

Before I toss this in the bin, does anyone know why the ublox is now outputting garbage?

Your USB GPS is the same as mine. No flash memory to "lock down" your custom settings. When left unplugged for 4 hours, it resets back to factory defaults. When I plug mine to u-center, it connects at 9600 baud.

server 127.127.20.0 mode 24

• "127.127" tells NTP to use a reference clock driver, as follows:
  
• "20" is driver#20, Generic NMEA GPS Receiver
• "0" is which GPS to use, /dev/gps0, you could have more than one
  
• "24" is a bitmask for the serial port linespeed and NMEA type (9600 baud and $GPZDA, respectively)

Unfortunately, I cannot test your scenario here because I'm doing something entirely different on my router for clock synchronization.

 

[GoNz0]

Your USB GPS is the same as mine. No flash memory to "lock down" your custom settings. When left unplugged for 4 hours, it resets back to factory defaults. When I plug mine to u-center, it connects at 9600 baud.

server 127.127.20.0 mode 24

• "127.127" tells NTP to use a reference clock driver, as follows:
  
• "20" is driver#20, Generic NMEA GPS Receiver
• "0" is which GPS to use, /dev/gps0, you could have more than one
  
• "24" is a bitmask for the serial port linespeed and NMEA type (9600 baud and $GPZDA, respectively)

Unfortunately, I cannot test your scenario here because I'm doing something entirely different on my router for clock synchronization.

Yes m8 I know, if I can get this updated version of ntpd working it may give me a valid GPS connection, I haven't given up yet (even got a 2nd on it's way)

 

[Fitz Mutch]

Not sure why the TinkerBoard link was bounced - bad cookie maybe?

I'm using Tor without the cookies to anonymously browse the Asus products. The DS3231 RTC is USD 1.50 and the Orange Pi Zero could be gotten for USD10.

 

[GoNz0]

Is anyone willing to compile NTPD with the necessary flags to allow the GPS to work?
Things have changed since this thread was started, files are missing from the GPS instructions

I spent a few hours messing about but got nowhere trying to compile the binaries...