How many ports can be used in Node-Red?

General
1

Hello,
This is Madan Kumar. i have a query that how many Ports can be used in Node-Red? is there any restrictions? or only Multiple ports can be used?? will be waiting for your reply.

Thanks&Regards,
M.Madan Kumar.

2

Hi.

What do you mean by ports?

TCP ports in the TCP nodes?
UDP ports in the UDP nodes?
The port node-red uses (typically 1880)?
The ports other ethernet based protocol nodes use?
What do you mean exactly?

3

The question is about Serial ports (they emailed me directly and I asked them to post here).

As I also replied, there are no restrictions in Node-RED that I am aware of over using multiple serial ports, and that it would take a couple minutes to test it to find out.

1 Like
4

Thanks for your reply,

i am asking about The port node-red uses (typically 1880)? can we use 4 multiple ports like 1880,1881,1882,1883.

Thanks & Regards,
M.Madan Kumar.

5

You can configure what port Node-RED listens on in your settings file.

The runtime starts a single HTTP server on that port and it is used for the editor and HTTP In nodes.

I seem to remember someone created a set of http nodes that spin up their own HTTP server on a different port, but I can't find it on flows.nodered.org - so maybe I'm misremembering it.

The other option is to run multiple node-red instances, each on a different port.

6

I've previously mentioned adding it as an option to uibuilder but it hasn't made it to the top of the backlog as yet. The ability to quickly run up a separate ExpressJS server which is fully independent from the Node-RED app servers might be useful to a few people.

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