Using Ethernet to transfer data using cRIO

[OsamaShah]

Hi, I want to transfer data from cRIO to another device using the Ethernet port. The CompactRIO model I have is NI cRIO-9063, which does not have the PoE ports. 

For example, I want to send data from cRIO to another cRIO using Ethernet port. Is it possible I could do so using TCP protocol? Are there any example VIs? 

Thank you.

[EgorKarlin]

You can try using web services. But this won't work for streaming data. Here's a description:

https://www.ni.com/docs/en-US/bundle/labview/page/overview-web-based-communication-with-a-labview-ap...

https://forums.ni.com/t5/LabVIEW-Web-Development/Getting-Started-Series-Hosting-Web-Service-on-a-Rea...

Also, if you add both devices to one project, you can use network shared variables:

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x2CMCAY&l=ru-RU

[EgorKarlin]

There is also an article describing the basic principles of working with TCP in LV.

https://www.ni.com/en/support/documentation/supplemental/06/basic-tcp-ip-communication-in-labview.ht... 

Also you can use Python scripts.

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x4PSCAY&l

https://pymotw.com/2/socket/tcp.html

[OsamaShah]

Hi. So I was able to send data from one computer to the other via Ethernet using UDP Example VI (not TCP).

However, the only way I could send the data was if I set the address in "UDP Write Block" from the Sender VI to 255.255.255.255.

If I set the Ethernet IPv4 Address that I set on the other computer, it would not work.

I have attached an image where it seems I'm getting the problem in acquiring the right address.

Please advise. Thank you!

[OsamaShah]

UPDATE:

I was also able to send UDP data via Ethernet by auto-configuring its IP Address and using that IP Address. However, the same approach was not possible through TCP. 

[EgorKarlin]

Launched examples for UDP. On one device, I send messages via UDP. On another device, I receive these messages. In my case, a similar example works.

Have you tried pinging between your devices?
Run->Cmd-> ping <IP_your_device>  

Do you find the device you need when you enter the command "arp -a"? (Run->Cmd-> arp -a)

Are your devices on a shared subnet?

[EgorKarlin]

Can you send and receive data over UDP using a terminal? For example Hercules:

[OsamaShah]

Hi karlin.

I was able to use UDP. And yes, I tested it with Hercules and it worked there as well, however, when I tried to replicate the same process via TCP, I was unable to send data. However, I believe this would work fine for my project. i.e sending data from cRIO to another device.

I will test that soon. Thank you for your help!

[EgorKarlin]

Hmm. When I make a remote device (in my case TPC2230) a server everything works.

But when I make my PC a server, it becomes impossible to establish a connection.

Perhaps this is the fault of the firewall settings. All ports on my PC are closed for incoming connections.

P.S. Please call me "Egor"

[OsamaShah]

Hi Egor, 

Same here. I even disabled the firewalls at both ends, the problem persisted.