cRIO Time-Synchronization NTP when cRIO is offline

[winterishere8]

All

I am trying to synchronize my cRIO to a NTP server that is hosted on an accessible intranet but no access to internet. I was looking at 

https://forums.ni.com/t5/Example-Code/Installing-and-Configuring-NTP-on-NI-Linux-Real-Time-Devices/t...

I was going to download the opkg package offline from https://downloads.openwrt.org/releases/, and transfer via USB to the cRIO and install.

It looks like opkg is target dependent. It looks like cRIO 9045 is armv7, but how do I match that with the compatible targets for opkg? Thoughts?

[Jacobson-ni]

There are feeds which have a lot of standard packages compiled for Linux RT systems at http://download.ni.com/ni-linux-rt/feeds/ .

Also, I believe the 9045 is x64 and not arm.

[winterishere8 · Accepted solution]

I ended up following these 2 links and it solved my issue 🙂

https://www.slideshare.net/BryanHeslop1/configuring-compactrio-to-synchronize-clocks-with-ntp-server...

Above link specifically addresses synchronizing cRIO to NTP when there is no internet available

https://www.cyberciti.biz/faq/linux-unix-bsd-is-ntp-client-working/

tells how to verify

(this is good for people who are not linux savvy)

[SKauth]

Thanks for sharing your insight. I'm also facing the issue how to update a cRIO without internet connection and with limited linux skills. Unfortunately the slideshare link is not working anymore. Probably it's just a few lines of shell commands, right?

[playerm1]

PDF copy of the slides attached.

[pacome]

Hello,

I am capable to make offline installation of a cRIO Linux Real Time system.

When I am connected with ssh, I can use opkg update and I can see that opkg uses my PC as a server.

But now I want to install NTP and I cannot find a way to download the ntp packages from openwrt.

Where did you find your ntp packages and how did you dowload them ?

Thanks for your help.