Unable to read serial data in Node red

General
1

I am getting data from the Modscan. but the same configuration is not working in Node-RED. need help on this situation
Node-RED Version : V4.0.8
Device : CR800 wms data logger
MOC: SerialR232 to USB

2

Welcome to the community but I'm afraid that there is nowhere near enough information in your post for anyone to be able to help.

What OS?

Have you checked in the OS that the device is connected to the port you anticipate?

Have you checked in the OS that your node-red user has access to the port?

3

Thank you for the reply.
It's is connect via RS232 to usb converter to the windows 10 system.

4

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5

I assume you cannot connect to the port from Node-RED and the tool at the same time (conflict)

6

This is just for reference only. I close the Modscan before injecting in Node-RED.
Data Reading in Modscan but same configuration not working in Node-RED

7

You will need to restart node-red (or do a full deploy) to reinitialise the serial connection.

If that doesn't work, share screenshots of setup details of your node and the scan program.

8

I have tried to restart Node-red. but the result are same. here i attached the screenshot for your referenec

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9

Sharing only the non working config without any detail is not really helpful.

So we can compare the working config of mobus scan application Vs non working node red.

Also, just as a double check, please confirm when you restarted node-red the modbus scan program was NOT running. In fact, do a restart to ensure the com port is released (and don't open the scan application)