Need some basic example how tcp-client is setup

General
1

Hi! does anyone knows how to make tcp-client setup to listen to a specific address and port. My apology if this may be simple but I don't figured it out yet how to make it work. I got the module from this link https://flows.nodered.org/node/node-red-contrib-tcp-client. I also tried the tcp request and works fine (Server: localhost Port: 7811) I can send string and receive message, but I wanted to try tcp-client.

Thanks for the time,
joe

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2

Do you need to create dynamic ports? If not you can use the core tcp-in node to create a listener. The tcp-request node creates an outbound connection.

3

I realized that the Tcp Request fits to my needs. The reason I tried to focus on the Tcp client, I thought it would be easy to modify it later, unlike the Tcp Request which included in the node red folder with the other category nodes(network,functions, storage & etc). Is it possible to have Tcp request only and cloned it then modify to my own need? I'm still new to node red(but I was able to do the lower-case example) and really appreciate any guide that will help me continue my application in mind.

Thank you,
joe

4

If you are feeling the need to amend a node, there is a good chance that you haven't thought through the opportunities that Node-RED brings and the slightly different way you may need to think about things.

It would be better if you explained what it is that you want to achieve.

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5

The core nodes source is in here https://github.com/node-red/node-red/tree/master/packages/node_modules/%40node-red/nodes/core/network
the 32-tcpin files contain all three tcp nodes so you can take it apart as you wish (and rename of course)

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6

Thank you for helping me out...I will post later if I have other questions.

Regards & more power,
Joe

7

I have a device that I would to control and I simply want my customised node functions same as tcp request node but wanted also to add or change to fit my need.

8

OK, that is more reasonable for sure.

9

Hi, thank you for creating and sharing these node modules. I'm still new in javascript so I'm still stuck in putting it together. So far here is what I did.

  1. Create a folder to place the js, html and jason file.
  2. Copy codes from 31-tcpin.js (function TcpGet part only).
  3. Copy codes from 31-tcpin.html (in the part tcp request).
  4. I created the jason file but not sure if I made it right.

When I open the terminal(on raspberry pi) I did the ff. commands
a.) cd to my folder(node-red-contrib-tcp-client)
b.) sudo npm install
c.) cd ~/.node-red
d.) sudo npm link node-red-contrib-tcp-client
Issuing the commands above did not show any errors but it also did not work. Can you help me try to identify what I'm missing? I also uploads the files I'm working on below.
package.json (2.7 KB)
tcp-client.html.txt (8.4 KB) tcp-client.js.txt (12.7 KB)

Thank you for the time,
Joe

10

No showing of node in the palette and the category I created. There must be conflicting between the existing node-red-contrib-tcp-client I have installed earlier. I will try to remove it...and see the result.

11

Give your new one a different name.

12

Hi!, just want to ask if I need to change the name of the html and js file?
"<script type="text/x-red" data-template-name="tcp-client">" ..in the html file(tcp-client), this should be change too?

13

I don't know if it is essential, probably not, but I always name them according to the node for consistency.

14

okay... I will try it. Thanks for the suggestion.

15

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