Silex Unwired

Babar Hashim

Recent Posts

KRACK attack threatens Wi-Fi Enterprise Security

Posted by Babar Hashim on 2017-10-17 17:51:59

Wi-Fi Enterprise Security is critical to Silex as we strive to provide secure, reliable and robust wireless connectivity solutions to our customers. We want to assure our customers that we are well aware of the recent KRACK attack threat to WPA2 Wi-Fi security, and we will be providing a solution imminently. 

Recently published research in below references have identified vulnerabilities in some Wi-Fi devices. Those devices reinstall network encryption keys under certain conditions, disabling replay protection and significantly reducing the security of encryption. This security vulnerability is inherent to the WPA2 protocol itself, and in principle impacts all products using the WPA security supplicant.

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Tags: Wi-Fi, 802.11n, Access Point, IoT, 802.11ac, WPA2, enterprise security

Linux Evaluation for SX-SDMAC/SX-SDPAC with Roaming Support

Posted by Babar Hashim on 2017-09-28 00:10:26

 Our SX-SDCAC which is in a SD card form factor (using the SX-SDMAC) is designed to allow evaluation of our QCA9377 based radios (SX-SDMAC and SX-SDPAC)) with the NXP's i.MX 6 SoloX Sabre SD board. To go with the hardware we also provide an evaluation software to make the evaluation process easy for our customers. 

We have just released an update to our evaluation software.

Summary of Updates:

 We have updated to support Linux kernel version 4.1. The most important enhancement in this release is the addition of roaming support.  We in our internal testing had found that roaming was not working well in the QCA reference driver. Silex being a QCA partner has access to the radio firmware source code which enables us to fix bugs and in some cases even add features to the driver. Our reference driver now supports roaming with roam times under 150msec. 

The evaluation image includes the Silex reference radio driver (with roaming support), supplicant and tools to test the following:

  • Basic Wireless Functionality
  • Advanced Wi-Fi Security
  • Data Throughput
  • Soft Access Point Mode
  • DHCP Server and Client
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Tags: Roaming, QCA9377

Can the SX-SDMAC 802.11ac Radio Module be Optimized for Cost, Size and Performance?

Posted by Babar Hashim on 2017-09-27 23:16:30

Yes it can, and is now Available from Silex!!!

The Silex SX-SDMAC Plus is a dual-band IEEE802.11a/b/g/n/ac WLAN plus Bluetooth 4.2 SDIO module. It is the latest addition to our QCA9377 product family. This latest module is optimized for cost, size and performance. This module makes it a very viable option for customers who want to take advantage of the higher 802.11ac performance at a lower cost and smaller overall footprint.

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Tags: 802.11ac

Select the Right IoT Module for Your Application

Posted by Babar Hashim on 2017-06-06 20:04:29

Need a low-latency, high reliability solution in a small form factor for your wireless medical device? Or a low-cost low power wireless option for connected consumer electronics? Silex Technology has you covered. Check out our IoT module selection guide to find the right IoT Wi-Fi module to provide the connectivity you need. 

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Operating the WPA Security Supplicant provided with the Silex Wi-Fi drivers

Posted by Babar Hashim on 2017-03-31 23:33:19

In general terms a supplicant is a software package installed on an end-user's client device. The device invokes the supplicant and submits credentials to connect the device to a secure network. If the authentication succeeds, the authenticator typically allows the device to connect to the network.

What is a WPA-Supplicant?

WPA supplicant is an implementation of the IEEE 802.11i supplicant for different operating systems like Linux, FreeBSD, Windows etc. The supplicant implements the security protocols and features addressed in the 802.11i standard. They include:

  • WPA and full IEEE 802.11i/RSN/WPA2
  • WPA-PSK and WPA2-PSK ("WPA-Personal", pre-shared key)
  • WPA with EAP ("WPA-Enterprise", for example with RADIUS authentication server)
  • Key management for CCMP, TKIP, WEP (both 104/128- and 40/64-bit)
  • RSN: PMKSA caching, pre-authentication
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Debugging techniques for the QCA9377 Wi-Fi driver

Posted by Babar Hashim on 2017-03-31 22:48:00

Two of our latest 802.11ac wireless modules, the SX-SDMAC and the SX-SDPAC are based on Qualcomm's QCA9377 chipset. The drivers for these QCA9377 based modules are made available via Qualcomm through their code aurora site, and may soon be available on their Qualcomm Developers Network site. 

For our "Absolutely Must Connect" customers such as medical, industrial, and manufacturing – unstable wireless connectivity can lead to a stop in operations, loss of productivity and economic efficiency, or even significant threats of safety and health. Those mission-critical scenarios where it absolutely must connect are where engineers and designers rely on our propriety Silex reference driver where we have made enhancements to the Qualcomm reference driver. 

One could choose either driver depending on their application, but when compiling Wi-Fi drivers for their devices, one of the most compelling problems they face is how to approach debugging. It is important to know how to debug code errors because it:

  • Can be exceedingly hard to reproduce
  • Can bring down the entire system
  • Can destroy evidence that could be used to track the issue
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Tags: QCA9377

Why OEM's need to put Wi-Fi radios in continuous TX modes for testing, analysis and certification?

Posted by Babar Hashim on 2017-03-31 01:30:00

Original Equipment Manufacturer's (OEM's) designing products using Wi-Fi or Bluetooth may need to obtain product certifications for the regions they plan to sell the product into. During the certification process, some test requires the device to either transmit a continuous stream of packets of a specified type and modulation, or continuously listen on a specified channel. These special factory test modes for the wireless radio are very useful for OEM's for:

  • Development
  • Evaluation
  • Manufacturing tests
  • Certification
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Tags: QDART

Can the SD card slot on the NXP i.MX7 Sabre Smart Devices Board be used for an SDIO Wi-Fi Module?

Posted by Babar Hashim on 2017-03-30 23:30:00

Our recommended platform to evaluate our latest embedded Wi-Fi module, the SX-SDMAC is the NXP i.MX 6 SoloX Sabre SD Board. The SX-SDMAC is a dual-band, single stream, 802.11a/b/g/n/ac plus Bluetooth “Smart Ready” module based on the latest Qualcomm Atheros QCA9377 System-on-Chip (SoC). NXP's i.MX 6 SoloX is a faster and a stronger processor supporting SDIO3.0 that makes it an ideal platform for our 802.11ac Wi-Fi SDIO module to get the best performance . 

 SX-SDMAC Features

  • Based on the QCA9377-3 SoC
  • 11 a/b/g/n/ac Wave 2 MU-MIMO Client
  • SDIO 3.0 WLAN Host Interface
  • Bluetooth 4.1 BR/EDR/LE “Smart Ready”
  • Industrial Temperature
  • Enterprise Security
  • FCC/IC/CE/MIC Modular Certification
  • Seamless Roaming
  • CCX Ready
  • Link Rate up to 433 Mbps
  • Fine Tuned Calibration Per Module
  • Connector Mount and Surface Mount Versions Available
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Silex's Latest Serial Device Server Featuring Qualcomm's QCA6234 Radio

Posted by Babar Hashim on 2017-03-24 22:29:07

SD-320AN is a dual band serial device server for RS-232 serial devices that need to connect to a secure network. It adds dual band wireless connection to an enterprise class wireless network. It supports wireless security with 802.11x authentication protocols for added security. It is targeted to be the successor product for the  SD-310AN. It is based on the newer Qualcomm Atheros radio, QCA6234, which is ideal for customers who are looking for long product lifecycle.

SD-320AN Features:
  • Dual band IEEE 802.11a/b/g/n support
  • Easily connect and share RS-232 serial devices on wireless networks
  • Enterprise security support
  • Access, monitor and control equipment over Ethernet or Wi-Fi
  • Multiple serial port modes and wireless modes for maximum flexibility in any environment
  • Optimized for roaming
  • Support for Windows, MAC and Linux

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Tags: Serial Server, Serial to Wi-Fi

SX-582 - The Next Generation Embedded Intelligent Wireless Module

Posted by Babar Hashim on 2017-02-02 01:25:47


SX-582
is a high-performance Serial/Ethernet to Wi-Fi embedded module, based on the Qualcomm Atheros AR6234 system in package (SiP) solution, that provides dual band 802.11n wireless connectivity for device manufacturers who want to add robust and secure Wi-Fi.

It features a 32-bit 454 MHz Freescale i.MX28 processor with an 802.11a/b/g/n radio, a complete TCP/IP network protocol stack, and an optimized QCA6004 wireless radio driver and security supplicant in a self-contained hardware package. A major advantage of the SX-582 is enterprise security, including WPA2 with 802.1x authentication, which enables it to be used on almost any customer’s network without compromising security. We have also added multi-client bridge support to the product as a standard feature.

 

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Tags: Intelligent Wireless Module