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Incorrect communication between 4diac IDE and FORTE on Raspberry [message #1867008]

Wed, 12 June 2024 04:18

Dustin Schmitt

Messages: 15
Registered: April 2024

Junior Member

Hi,
after building successfully the http client-FBs i would like to run my programm completely or partwise on my raspberry pi. But even the communication with my raspberry pi with the developer version of Forte isn't possible. Always the following error appears:

ERROR T#1718152924431828312: CBSDSocketInterface::receiveDataFromTCP recv() Unexpected: nRetVal: 0, ERR: 0 Success

I found this error before in one of the screenshots by Konstantin in this topic:
https://www.eclipse.org/forums/index.php/t/1114677/

Is there a method to avoid the error or avoid it.

I already tried an older forte version on my pi and the develop forte version on my windows and a publish/subscibe-request but the data isn't transferred.

Thanks
Dustin

Attachment: Sub_Pub_Old_NewForte.png
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Attachment: Pub_FortePC.png
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Attachment: Sub_Raspberry.png
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Re: Incorrect communication between 4diac IDE and FORTE on Raspberry [message #1867032 is a reply to message #1867008]

Wed, 12 June 2024 14:05

Alois Zoitl

Messages: 1639
Registered: January 2014

Senior Member

The recv message should be fine it should only indicate that the client closed the connection.

In the publish/subscribe setup 4diac FORTE per default is using UDP multicast messages with a time to live of 1.

Problems like the one reported by you can have several reasons and are mostly because of the network setup.

First of all you need to ensure that multicast routing is configured. You can find tips for it in several places in the the documentation. E.g. in the trafic light example and in the FAQs.

As the TTL is set to 1 both your PC and your raspi need to be in the same subnet.

I hope this gives you enough tips to get that fixed.

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Re: Incorrect communication between 4diac IDE and FORTE on Raspberry [message #1867047 is a reply to message #1867032]

Wed, 12 June 2024 22:20

Dustin Schmitt

Messages: 15
Registered: April 2024

Junior Member

Okay I didn't tried again the publish/subscribe-setup with diffrent forte versions, but you were right the error message isn't a problem. My system is running with a develop version of FORTE on both devices.

Thanks for the fast reply
Dustin

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