We are using a TCP node and that is working well. However , the TCP Host address will be changing based on user setup. Looking for method to have user enter the Host IP address in Dash board and pass that into the TCP node as IP address. But not having much luck. Any ideas? [tcp-host]

I am new to Node-Red please explain step 3.

This should help you get started working with messages. Also read throught the node red docs and the cookbook. https://nodered.org/docs/user-guide/messages

The only way I could get this to work was to put a Change node after the Inject node. Set two new properties, msg.host and msg.port to the appropriate values. The TCP Request node would then connect to the TCP socket but it would constantly error out with "Missing host or port value" and be non-fu…

I have since learned how to set the message parameters more appropriately, but the same issues seem to remain. If you dynamically set host and port, the TCP request node refuses to stay open even though it is configured to never return. It closes immediately after opening. The object seems to hav…

Another interesting, undocumented 'feature' I just ran across. Scenario is like my above post where the IP address and TCP port would be dynamically set for a TCP Request which is "never - keep connection open". An initial connect request can open the socket fine and it stays open. In my case the…

You can set properties of (most) nodes by using environment variables from outside of Node-RED - so you can expose them that way to be configured for free... https://nodered.org/docs/user-guide/environment-variables

[image] guitarpicva: While this is incredibly tedious yeah - it's not like you have a computer to help fill them in for you... but we will happily consider a Pull Request that fixes it if you like.

It wasn't the HOW to do it that is annoying to me, it was that that this rather important detail is not documented. It's sort of an important point. A lot of folks have asked very similar questions on the forum, and not one answer contained this information. I will dig up the github and put in a …

And in all my crankiness, I neglected to say a huge "THANK YOU!" to those who created the Dashboard nodes. Just terrific stuff that has opened new vistas for my dev work. I really appreciate it. :clap:

Well the info sidebar for the tcp request node does say " If you leave tcp host or port blank they must be set by using the msg.host and msg.port properties. " Of course if you don't leave them blank (eg by using the environment variable approach) then you don't need to set them - and indeed if…

TCP Host Address via msg.payload?

Dashboard

Colin 25 November 2021 09:38 26

This thread is about setting the host address. You have already asked how to set the time in your previous thread. Please keep further discussion to that thread. I will close this one as it is two years old.

Topic		Replies	Views
TCP output node - dynamically change HOST Address General	4	924	28 August 2019
Dynamic IP address in node TCP in & out? General	18	1136	24 June 2022
Improve TCP nodes (IP and Port programmatically) Feature Requests	6	471	7 November 2022
Tcp request node, host/port via flow works only once General	20	6723	3 February 2019
Need some basic example how tcp-client is setup General	14	5144	24 November 2020

TCP Host Address via msg.payload?

Related topics