Dear members of the Dojo community,
A device is accessible on a certain IP address and port 111 via Telnet. An element on the DMA running a serial protocol sends commands but is not receiving commands. If you start a command prompt on the same server and type 'telnet <ip-address> 111', a dialogue box opens and as long as this dialogue box is open the element in Dataminer is not in time out anymore.
Is there a setting on this Dataminer System or specifically in the connector that has an impact on this behaviour?
Okay, I will try to investigate if I find a difference in the messages sent before or after opening the Telnet dialogue.
I made two Wireshark captures, one with the dialogue box open and one with the dialogue box closed to search for a difference. If I find a difference, I will share it here with the Dojo Community.
I added a finding of this comparison as a new answer below.
By comparing the two Wireshark captures, I found a possible clue that might explain this strange behaviour.
With Telnet CMD closed, our 192.168.122.168 is sending from all different ports, ranging in this Wireshark capture from port 57089 to port 57138. With Telnet CMD Open, it also started with little variations, but when it started using source port 57023, it stuck with this port and the element was not in time-out anymore.
I don’t immediately have an answer for this bizarre problem, but maybe you can also take a look with Wireshark if there is something you notice in the communication on the wire…