Node-Red Wireless Gateway: Failed to connect

faisalaljundi · January 30, 2023, 7:12am

We are facing issues to connect wireless gateway. In the system, We are using the node 10.24.1 version.

We are also trying to upgrade node version 16.0.0 version but then ncd-wireless gateway or ncd-wireless gateway2 are not visible to install.

Kindly advice.

Please review the attached images.

TravisE_NCD_Technica · January 30, 2023, 1:45pm

You will need to install ncd-wireless-2 manually by navigating to the .node-red directory, then use this npm command to install ncd-red-wireless:

npm install ncd-red-wireless-2

faisalaljundi · January 31, 2023, 7:06am

Hi, After install the node-red-wireless2, we have run node-red command and browse 127.0.0.1:1880.
Still we are not able to found “node-red-wireless2” node.

faisalaljundi · January 31, 2023, 1:22pm

Can you please confirm the port configuration as showing in the screnshot?

A- Serial Device : /dev/ttyUSB0
B- Lockfile Location : /var/lock
C- Callin Program :
D- Callout Program :
E- Bps/Par/Bits : 115200 8N1
F- Hardware Flow Control : Yes
G- Software Flow Control : No

TravisE_NCD_Technica · January 31, 2023, 2:17pm

Is Node-Red throwing an error in the console when you attempt to start it? In the first post the last screen shot appeared to throw the error port already in use.

When the USB modem is connected to your computer does the USB LED turn on solid? Also do you see a new port listed in /dev/tty*? If not it’s possible you’ll need to install a driver. Please let me know which Modem you are connecting to the computer I want to make sure it’s a USB modem and not a Mega Modem, you can just provide a photo of the modem connected to the computer with the lid removed.

faisalaljundi · January 31, 2023, 2:36pm

Dear Travis,
As a quick response for your questions:

The USB modem is connected to a computer with Ubuntu OS
USB LED status: the devices are setup in a remote location (another country). I will get this later
Is the port listed: Yes. see screenshots.
Instal Driver: Can you share the driver for ubuntu?
Modem details: I can get them from the Order under our account: Industrial IoT Wireless to USB Modem. If you still need the photo of the modem, I can send our technician to take a photo for the modem with the lid removed.

TravisE_NCD_Technica · January 31, 2023, 3:44pm

If the Modem is mounting to the system’s /dev directory then there is no need to install the driver.

This is most likely a permissions error on the /dev/ttyUSB0 serial port. More than likely on your system the permission group for the port is Dialout. You may need to add node-red to the dialout group. You can take a look at a GitHub issue here in reference to that:

github.com/node-red/node-red-docker

Add node-red user to dailout group

opened 06:16AM - 17 Oct 19 UTC

RaymondMouthaan

enhancement question feature investigation

Add `node-red` user to `dailout` group by default instead of node-red group. …From [Debian Wiki](https://wiki.debian.org/SystemGroups): >dialout: Full and direct access to serial ports. Members of this group can reconfigure the modem, dial anywhere, etc. In current images, node-red user has it's own group `node-red`, which has no permissions to serial. To gain permission to serial, one needs to add --user `node-red:dailout` to the docker run command or equivalent in docker compose file. We might want to add `node-red` user to the `dailout` group, so that above is no longer required and node-red has permission to `serial` by default. However, current users **might** get permission issues with the persistent dir, because of current group. Do all architectures have `dailout` group available? [ √ ] amd64/alpine [ √ ] arm32v6/alpine [ √ ] arm32v7/alpine [ √ ] arm64v8/alpine [ √ ] i386/alpine [ √ ] s390x/alpine Proposal: create a feature branch for this change and do some tests.