# Node Red access to USB port for rfxcom (running in iobroker)
**URL:** https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626
**Category:** General
**Tags:** windows, iobroker
**Created:** [16 April 2023 11:20 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626 "2023-04-16T11:20:17Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)
#### Post date: [16 April 2023 11:20 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/1 "2023-04-16T11:20:17Z")
My Node Red runs in iobroker, on Windows10 Pro. I want to give Node Red access to one (or all) of my USB ports, to access my Rfxtrx 433 device (it is on USB4)
I am trying to use the Rfxcom nodes, but trying to configure the device it does not look as if I have access to the USB ports on my machine. I guess I need to configure that in iobroker, but dont know how
I have a rfx sensor node, and configured the serial port as /dev/ttyUSB4, but it just says disconnected under the rfx sensor node (I have tried anything from USB0 to 4). I have attached a debug to the sensor node (show complete message) but nothing is showing in the debug window
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [16 April 2023 12:18 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/2 "2023-04-16T12:18:29Z")
> [@Mikee1234K](#):
>
> /dev/ttyUSB4
That is not a Windows USB port. They are things like `COM3:`.
To see available COM ports, open "device manager", turn on "show hidden" and they should show up as "Ports (COM & LPT)"
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### Author:  [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)
#### Post date: [16 April 2023 12:29 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/3 "2023-04-16T12:29:40Z")
It is on USB4. I checked in the device manager on the events, which shows
Device FTDIBUS\VID\_0403+PID\_6001+A1Y17NPPA\0000 was configured.
Driver Name: oem19.inf
Class Guid: {4d36e978-e325-11ce-bfc1-08002be10318}
Driver Date: 08/16/2017
Driver Version: 2.12.28.0
Driver Provider: FTDI
Driver Section: FtdiPort.NTamd64
Driver Rank: 0xFF0000
Matching Device Id: FTDIBUS\COMPORT&VID\_0403&PID\_6001
Outranked Drivers:
Device Updated: false
Parent Device: USB\VID\_0403&PID\_6001\A1Y17NPP
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [16 April 2023 12:31 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/4 "2023-04-16T12:31:10Z")
So the serial port you need to use in Windows is `COM4:`
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### Author:  [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)
#### Post date: [16 April 2023 12:34 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/5 "2023-04-16T12:34:07Z")
Yes I tried that, its not connecting
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [16 April 2023 12:38 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/6 "2023-04-16T12:38:41Z")
Possibly the port needs a specific configuration - you would need to check the devices documentation for that. Or possibly ioBroker is getting in the way, I don't use it so I can't help there.
I would usually stop node-red and use a command line tool to connect to the serial port to make sure it is talking and that I know what settings to use.
Also check and make sure nothing else has grabbed the port. Typically only one app/service can connect to a serial port at one time.
You could also delete the rfx node and use a standard serial node to see if you can get any data out.
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### Author:  [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)
#### Post date: [16 April 2023 12:42 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/7 "2023-04-16T12:42:33Z")
That was it. My Homeseer system was still using the USB port to read data from the Rfxtrx. After I turned it off, data started flowing !
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [30 April 2023 12:43 UTC](https://discourse.nodered.org/t/node-red-access-to-usb-port-for-rfxcom-running-in-iobroker/77626/8 "2023-04-30T12:43:29Z")
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