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View Full Version : Ping ok, but still no Comms

Jon236
26-12-2010, 08:08
Has anybody seen (and solved) the conundrum whereby you can wirelessly ping every part of the control system, including the cRio, yet the DS shows no robot communications?

I remember seeing a previous post that that was all the DS did to check comm status.
Radical Pi
26-12-2010, 13:42
I think pings are only used in the diagnostics screen, but the big section with "Robot Communications" means it is actively talking to the FRC_NetworkCommunication task on the cRIO.

Are you running NetConsole? Can you check if it is posting any errors?
Jon236
26-12-2010, 14:21
Strangely enough, it began working after multiple reboots and resets.....so I'm still trying to figure out why!
kamocat
26-12-2010, 16:00
Has anybody seen (and solved) the conundrum whereby you can wirelessly ping every part of the control system, including the cRio, yet the DS shows no robot communications?

I remember seeing a previous post that that was all the DS did to check comm status.
I think any trouble I've had with that has to do with multiple network interfaces; having both ethernet and wireless enabled, and the DS doesn't know which to choose.
Jon236
26-12-2010, 22:00
The strange thing is the DS would only connect to the cRio if I had the wireless turned ON in my laptop!
kamocat
26-12-2010, 22:06
Are you connecting through ethernet or through wireless?
Jon236
26-12-2010, 22:32
Wireless
kamocat
27-12-2010, 16:14
That sounds like the issue then.
You may have to disabled your ethernet port (or have it disconnected) in order for your DS to connect.
Jon236
27-12-2010, 16:18
But I was using the ethernet port to connect to the router. While I could ping the cRio with the wireless off, I needed to turn it back on for the DS to see the robot. Very strange!
kamocat
27-12-2010, 16:32
That means your DS was configured to use your wireless interface.
I don't recall how to switch it, but disabling your wireless might work. (If you're using Windows XP, this is done in the Network Interfaces part of the Control Panel; turning your wireless off on your laptop does not disable the interface.)
Greg McKaskle
28-12-2010, 23:11
On last year's DS, the communications thread would lock in the DS IP address and the robot would need to be rebooted in order to change the DS to a new IP. Changing from wired to wireless NIC would typically use a new IP.

Greg McKaskle