Wireless Access

Contributor I

203R series micro USB driver error

Dear community,


I'm trying to gain console access to a 203R RAP.


When I connect the RAP to my Windows 10 machine using a generic USB 2.0 A to micro USB cord I get an error: Unknown USB Device (Device Descriptor Request Failed). I never see the CP210x USB to UART device showing up in my device management.


I've tested 2 RAPs from the 203 series with same results, unfortunately I don't have any other type of AP with micro USB interface at my disposal. I've also tried various drivers with no success.

http://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers both v6.7.4 versions




Anybody got any ideas to fix this issue? Do I need a special type of USB cable perhaps? 


Edit: tested a second RAP to see if the first one was faulty

Re: 203R series micro USB driver error

You need to purchase a custom USB cable , see the ordering guide

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Thank you

Victor Fabian
Lead Mobility Architect @WEI
Contributor I

Re: 203R series micro USB driver error

Thanks for the quick reply, explains everything :-)


<edit> I'd like to express my frustration with Aruba's choices regarding console access. I used to be able to trust on a serial port being available. I understand there is a need for ports with a smaller footprint but please, can Aruba make a decision and stick to it! I'm now adding a third console access cable to my inventory where I used to have just one. I'm almost counting on having to add a custom BLE interface in the near future to troubleshoot Aruba products.

Contributor I

Re: 203R series micro USB driver error

Hey Victor,


The custom USB cable arrived, unfortunately I'm getting the exact same error: Unknown USB Device (Device Descriptor Request Failed). 


Cable label says: AP-CBL-SERU,JY728A 3.3V TTL Serial Cable


I'm submitting a ticket for technical support, will update here in case we find a solution.


Re: 203R series micro USB driver error

Contributor I

Re: 203R series micro USB driver error

How do I get these installed? I tried to manually update the driver by pointing towards the unzipped folder, but windows found no drivers inside.


I discovered today that a slightly newer laptop had no issues getting the USB cable to work on the 203R. It runs a newer version of Windows 10 (version 1703 creators update) compared to mine (Version 1607)

Re: 203R series micro USB driver error

As I've just tried to connect to an AP-303H I have had encountered the same issue.


It would be preferable if Aruba stuck to using a standard RJ45 for console connectors. Additionally, now as noted by Udimonk I now have to buy a third cable! These are ridiculously priced for what you get. The proprietary cable i bought to be able to console into the 300 series is very flimsy and not worth the list price of £62!



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