# Help with how to make a TEST SYSTEM to test someting

**URL:** <https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300>\
**Category:** General\
**Created:** [26 November 2022 20:10 UTC](https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300 "2022-11-26T20:10:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [26 November 2022 20:10 UTC](https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300/1 "2022-11-26T20:10:30Z")

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Ok, sort of getting back to my post/question on the `Samsung TV control` node set.

Problem: Seems it doesn't like talking between certain types of networks.  
But not all.  
I'm not sure of the specifics. It would be nice if I knew. But I don't.

What I know:  
Port `8002` is used.  
I can use it between CERTAIN networks, but not others. So I would like to find out _what_ is the problem.  
is the port somehow blocked?

So I want to make something that _talks/uses_ port `8002` and send a message between two machines and see what happens.  
Is there comms allowed.  
Could I get away with using MQTT and change the port used?  
Seems viable, but just wanting to ask if anyone has done anything like this before.

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [26 November 2022 20:42 UTC](https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300/2 "2022-11-26T20:42:25Z")

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Just use the tcp nodes to test tcp and udp nodes to test udp comms.

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**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [26 November 2022 20:43 UTC](https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300/3 "2022-11-26T20:43:25Z")

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Thanks.

Sorry, I'm a bit overwhelmed with things and didn't think of the obvious.

Shall do.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [10 December 2022 20:43 UTC](https://discourse.nodered.org/t/help-with-how-to-make-a-test-system-to-test-someting/71300/4 "2022-12-10T20:43:51Z")

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