My GPS receiver is on /dev/ttyUSB0 because my firmware's kernel configuration was changed to enable the FTDI usb-to-serial driver. AND, my u-blox GPS is locked at 9600 baud, and ntp.conf configured to match this locked linespeed. No external program was needed to stty the linespeed.
login as: GoNz0
sfx@raspy3:~ $ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
-4.144.155.104.b 216.239.35.4 2 u 183 1024 377 83.653 -12.253 1.001
+www.amsatfox.or 130.207.244.240 2 u 610 1024 377 97.978 -0.879 2.914
-smtp.visionnet. 216.229.0.179 2 u 757 1024 377 43.296 6.982 3.350
*x.ns.gin.ntt.ne 249.224.99.213 2 u 799 1024 377 21.666 -0.464 2.674
+alphyn.canonica 132.246.11.231 2 u 627 1024 377 82.694 2.425 0.688Not at all, SiRFstar is a fine choice for GPS. I just happened to pick u-blox because I found one on eBay for $8.Sadly my chipset is SiRF Star IV. Like I said, I cheaped out. Penny-wise, pound foolish.
That's right. My ntp.conf is for GPS-only, no Internet time servers. You may add the synchronisation with Internet time servers to ntp.conf, just in case those GPS satellites go missing... you know what to do.
It does not.
According to the website it has a capacitor for holding configuration that lasts about 4 hours. So if I turn the router off if I go on vacation I'll have to remember to plug it back into my windows machine and reset it. Ah, well.
I have no ttyACM0. ttyUSB0 exists. It just doesn't seem to be actually receiving data from the gps.
# dmesg | grep GSM
USB Serial support registered for GSM modem (1-port)
option 3-2:1.0: GSM modem (1-port) converter detected
usb 3-2: GSM modem (1-port) converter now attached to ttyUSB0
option: v0.7.2:USB Driver for GSM modemsIt appears that my $8 u-blox USB GPS has only 4-hour capacitor to back the RAM, too.It does not.
I had to disable the Asus USB modem stuff, for my FTDI usb-to-serial converter.
#!/bin/sh
deny_access() {
local FILEPATH="$1"
local FILENAME="$(/usr/bin/basename $FILEPATH)"
local FILEEXT="${FILENAME##*.}"
if [ "$FILEEXT" == "ko" ]; then
local MODULENAME="${FILENAME%.*}"
local FILEPATH="/lib/modules/$(/bin/uname -r)/$(/sbin/modprobe -l $MODULENAME)"
if [ -f "$FILEPATH" ] && [ ! -h "$FILEPATH" ]; then
/sbin/lsmod | /bin/grep -qF $MODULENAME && /sbin/modprobe -r $MODULENAME && /bin/sleep 1
/bin/mount -o bind /dev/null "$FILEPATH"
fi
else
if [ -f "$FILEPATH" ] && [ ! -h "$FILEPATH" ]; then
[ -n "$(/bin/pidof $FILENAME)" ] && /usr/bin/killall $FILENAME && /bin/sleep 1
/bin/mount -o bind /dev/null "$FILEPATH"
fi
fi
}
# disable automatic loading of USB modem drivers and programs
deny_access option.ko
deny_access usb_wwan.ko
deny_access drxvi314.ko
deny_access /usr/sbin/find_modem_node.sh
deny_access /usr/sbin/find_modem_type.sh
deny_access /usr/sbin/getrealip.sh
deny_access /usr/sbin/gobi_update.sh
deny_access /usr/sbin/modem_at.sh
deny_access /usr/sbin/modem_autoapn.sh
deny_access /usr/sbin/modem_enable.sh
deny_access /usr/sbin/modem_status.sh
deny_access /usr/sbin/modem_stop.sh
deny_access /usr/sbin/chat
# disable the Asus NTP CLIENT
[ -n "$(/bin/pidof ntp)" ] && /usr/bin/killall ntp && /bin/sleep 1
/bin/rm -f /var/run/ntp.pid
/bin/mkdir -p /var/run/ntp.pid
deny_access /usr/sbin/ntpclientYeah, that was a big NOPE. It wasn't attached under /dev at all. I really do appreciate your help, you've given some places to look ... it shouldn't be this difficult.
GoNz0@Router:/tmp/home/root# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*85.199.214.102 .GPS. 1 u 57 64 377 20.948 -0.664 1.272
-nx0.cospix.net 216.218.254.202 2 u 1519 1024 156 188.748 -14.455 1.294
+banzai.ruselabs 131.176.107.13 2 u 422 1024 377 22.775 -0.678 0.640
+85.199.214.99 ( .GPS. 1 u 35 64 377 23.015 -1.533 5.440Here's me:
# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
oGPS_NMEA(0) .GPS. 0 l 6 16 377 0.000 -0.238 0.057Just 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.
I rebooted again and now I have this
remote refid st t when poll reach delay offset jitter
==============================================================================
host-87-242-168 .INIT. 16 u - 64 0 0.000 0.000 0.000
+mail1.ugh.no 173.104.121.200 3 u 26 64 1 19.418 8.509 94.927
*5751b502.skybro 85.199.214.98 2 u 29 64 1 36.093 9.582 10.536
+lyla.preshweb.c 109.74.195.175 3 u 29 64 1 25.490 5.491 13.029
GoNz0@Router:/tmp/home/root#This may show which ntp.conf.... and i'm stumped again, how the hell is it picking up servers it isn't configured for
ps ww|grep ntpd
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