Serial input node stops reading data

[XYZ]

Sorry. I didn't understand. If you mean whether there is anything else coming on the serial node when it stops, then it is nothing.

[Colin]

No, I want to see the output in the terminal when you start node-red. The output that starts something like this

Welcome to Node-RED
===================
25 Oct 15:21:21 - [info] Node-RED version: v3.0.2
25 Oct 15:21:21 - [info] Node.js  version: v16.18.0
25 Oct 15:21:21 - [info] Linux 5.4.0-131-generic x64 LE
25 Oct 15:21:21 - [info] Loading palette nodes
...

However, I have just notice that you are using an old version of node-red (2.0.5) and an out of support version of node.js (12.16.2). I suggest you make sure first make sure all your installed nodes are up to date (in Manage Palette), then update node.js to v16 or v18 and then node-red to the latest (3.0.2).
If is then still doesn't work post the log above.

[XYZ]

Got you. Will update everything first. Then will run the NodeRED and let you know. Thanks

[Colin]

After you update node.js you will need to go into your .node-red directory and run
npm rebuild
to rebuild all the installed nodes for the new nodejs version.