1. Tp Link 802.11n Nic Driver

Linux Drivers for CC2540 #2. Kyleterry opened this issue Aug 15, 2013 2 comments Comments. I started to use the USB dongle with Ubuntu 12.10. It communicates. Have a serial port connection to the CC2540 USB Dongle. The screen is divided up into a few sections: the left sidebar contains information on the CC2540 USB Dongle status. The left side of the sub-window contains a log of all messages sent from the PC to the CC2540 USB Dongle and received by the PC from the CC2540 USB Dongle. 请问是否第一回使用USB dongle？第一回需要烧入固件，请按照以下步骤： 1、 用smartRFProgrammer 烧入 C:Texas InstrumentsBLE-CC254x-1.4.2.2AccessoriesHexFilesCC2540USBdongleHostTestReleaseAll.hex 2、查看设备管理器， 进行驱动更新，更新文件是C:Texas InstrumentsBLE-CC254x-1.4.2.2AccessoriesDrivers ccxxxxusb. 在使用CC2541DK-MINI Revision 1.0.4开发板时，套件里有个cc2540 dongle，但dongle的驱动一直没安装上，驱动安装时参考的《swru270c.pdf》，驱动文件用的是 ：C: Texas Instruments BLE-CC254x-1.4.2.2 Accessories Drivers；. Description The CC2540 USB Dongle is a complete example of how to use the USB enabled Bluetooth Low Energy (BLE) Wireless MCU. The reference design can be used to enable Bluetooth Smart and Internet of Things applications on any system that contains a USB host.

• 3Analysis
• 4Protocol
  • 4.2Reading BLE frames

Status

At this point (2017-05-09), the status is:

• it is pretty clear which commands the default sniffer firmware understands
• I wrote a little test program to dump raw BLE frames
• there is no plugin for WireShark yet

Introduction

This page is about the CC2540 bluetooth low-energy sniffer dongle and getting it to work with Linux.A nice end result could be that it becomes possible to sniff directly in WireShark with this dongle.

I have such a 'WeBee' dongle that can be found for about E15,- on websites like Aliexpress.

It's supposedly a CC2540 (or compatible) dongle, the USB id is 0451:16b3.

Interesting links:

Analysis

USB descriptor

When plugging this stick into a Linux machine, you can see it uses only one bulk endpoint.

Reading the identification from the stick with the 0xC0 command, results in the following 8-byte response

You can recognise the 2540 type number in there.

USB logs from Windows

This USB device does actually work with Windows:

I've captured a log of the communication over USB while the BLE is capturing bluetooth traffic from some iBeacon, using USB pcap.

In the logs, I cannot see any firmware blobs being downloaded to the stick.Probably the stick comes with a pre-loaded firmware of itself to do the BLE sniffing.

The USB control transfer request codes seem to match up with the code in https://github.com/christianpanton/ccsniffer/blob/master/ccsniffer.py

• 0xC0, GET_IDENT: returns some kind of identifier
• 0xC5, SET_POWER
• 0xC6, GET_POWER
• 0xC9, no idea, this appears in my USB logs but I can't find it in the python code
• 0xD0, START
• 0xD1, STOP
• 0xD2, SET CHAN

Protocol

In the windows sniffer software, it seems there are only two things communicated:

• towards the stick: which radio channel to sniff, and some other radio settings
• from the stick: raw sniffed BLE frames

Configuring the radio

This appears to be done using USB control transfers.

The following requests are sent:

Request type 0x40 is a vendor-specific device request from host-to-device.Request type 0xC0 is a vendor-specific device request from device-to-host.

Reading BLE frames

This appears to be done using USB bulk input transfers.

I can see a lot of similarities between the USB log and the BLE sniffer log.

Each frame starts with a byte indicating the type of frame, following by two bytes indicating the length of the rest of the frame (encoded as little endian).

data frames

The bulk USB data starts off with two bytes indicating the length of the rest of the data.

In the example image on the right:

• 00: 0 means this is a data frame
• 31 00: length of rest of frame encoded in little endian = 49 bytes decimal
• 39 04 29 54: part of the time stamp
• 2c d6 be ..: data frame contents

unknown frames (tick or 'alive'?)

The stick also returns 4-byte frames, alternating between

and

Interpretation:

• 01: 1 means this is a frame of type 1
• 01 00: length of the rest of the frame encoded in little endian = 1 byte
• 40 or C0: unknown data byte

Software

Preliminary code can be found athttps://github.com/bertrik/cc2540

It connects to the dongle and dumps raw USB packets to stdout.

This software requires libusb-1.0-dev

Tp Link 802.11n Nic Driver