Usb port reading problem


I installed node-red on a debian 10 VM on proxmox 7

on using the serial port function and I have this problem
serial port /dev/ttyUSB1 error: Error: Error: Permission denied, cannot open /dev/ttyUSB1"

param. VM proxmox

I don't know proxmox but I can tell you that most user accounts on Debian won't have access to serial/usb unless you add the right group to the account. ls -la /dev/ttyUSB* should let you see the right group you need to add.


thank you for your reply
I had already included it

what can also say is that in the drop-down menu of the serial port,
NR does not offer me the ports when I click on the magnifying glass


Are you sure which user is running node red?

yes everything works except the serial ports

Can you share the startup script for Node-RED please? We need to confirm what user account is used to start Node-RED and then make sure that it is added to the dialout group.

what is the name of the file

How do you start node red?

yes everything works except the serial ports

have you tried the complete id ? /dev/serial/by-id/xxxxxxxxxxxxx

I don't know. It depends how you start Node-RED.

That does not tell us what command you use to start node red, and from which directory you run it.

I don't have this info
you will have to help me
do you want me to edit the node-red-service file?

If that's how you are starting node-red, you can just share it with us as long as there is nothing sensitive in it.

see the nodered.service

Right, so now we know that you are starting Node-RED using a user id of Jeedom.

So can you please report the output of this command: groups Jeedom

Can you post the output of
Please copy/paste text rather than screenshot. When pasting use the </> button at the top of the forum entry window and paste the text where it says.

OK I copy/paste