![]() Typically, you’ll find that Wireshark shows a lot of data from nearby BLE devices, and that’s due to the fact that BLE devices have become very ubiquitous. To stop the capture, click the red Stop button. To start sniffing BLE data, click the green Wireshark button, and you should start seeing some BLE traffic: The default mode for the nRF Sniffer is scanning all three of these channels, but you can modify that within the nRF Sniffer Interface Toolbar.Ĭapture Advertising Packets using a Bluetooth Low Energy Sniffer If you recall, advertising BLE devices broadcast packets on the three primary advertising channels (37, 38, and 39). ![]() Selecting the RF channels to hop on when searching for advertising packets. ![]() This allows you to decrypt encrypted data being exchanged between two paired or bonded BLE devices. Selecting a key (type and value): which applies during a connection (primarily keys related to pairing and bonding). Select a specific device, whether via the Bluetooth address or by using an IRK (which a bonded BLE device uses to resolve a previously bonded BLE device’s random Bluetooth address). Selecting the interface, which can be helpful when you have multiple nRF52840 USB dongles attached. The toolbar provides a few useful options: Once you have it enabled, you will see it at the top of the window right below the generic Wireshark toolbar: You can do so from the following menu in Wireshark: Once you’ve completed all these steps, you’re ready to sniff some BLE packets! Enable the nRF Sniffer Interface Toolbarīefore we start getting into the technical details of sniffing advertising packets, I recommend enabling the nRF Sniffer Interface toolbar. Copy the nRF Sniffer Wireshark Profile to the appropriate Wireshark folder ĭownload the nRF Sniffer software packageĭownload and install the nRF Connect for Desktop applicationĭownload and install the SEGGER J-Link Software packageįlash the nRF52840 USB Dongle with the BLE sniffer firmware hex file via the Programmer app within the nRF Connect for desktop applicationĬopy the nRF Sniffer software to the appropriate Wireshark folder You can access this at Nordic’s dedicated Infocenter page or in the nRF Sniffer User Guide. We don’t need to go through the details of the installation and setup since Nordic has a comprehensive guide for this. Install and Configure the nRF Sniffer for Bluetooth LE Software The solution works for all major operating systems: Windows, macOS, and Linux (make sure you check Wireshark prerequisites for version compatibility). However, I do not recommend the nRF51 series development kit or USB dongle as this does not support many of the latest Bluetooth features. Note: You can use any Nordic Semiconductor nRF52 series development kit as an alternative. To use this BLE sniffer solution, you will need to make sure you have a few things in place. □ Insider Tip: Want to get more comprehensive courses to help you master BLE? Check out the Bluetooth Developer Academy! Set Up Your Environment We will cover the topic of sniffing BLE connections in a follow-up tutorial. All BLE devices start in the advertising state, so this is the perfect place to start! In this tutorial, we will focus on capturing and analyzing Bluetooth Low Energy advertising packets using the combination of the nRF52840 USB Dongle, nRF Sniffer software tool, and Wireshark. Moreover, reading and interpreting raw packet data gives you greater insight into how BLE works – something that would take much longer by only reading the theory, specifications, and even developing applications! Then you can blame your mobile developer or embedded developer for that pesky bug! (j/k! □ ) It integrates with Wireshark, an open-source, free software tool with many powerful features.īy becoming proficient at BLE sniffing techniques, you can troubleshoot bugs more efficiently and optimize performance by adjusting the settings of your Bluetooth Low Energy product accordingly.Īs a Bluetooth developer, this unique skill gives you “magical powers” to uncover the unknowns in many scenarios where things just aren’t working as expected with your Bluetooth Low Energy devices. It plugs directly into the USB port on your computer, so there is no need for cables. This combination is probably the most versatile and cost-efficient solution available today for sniffing BLE! Here are some unique advantages of this solution: One noteworthy BLE sniffer from that list is the Nordic Semiconductor nRF52840 USB Dongle (in combination with the nRF Sniffer and Wireshark). The list of Bluetooth LE sniffers varied from those costing under $50 to others costing tens of thousands of dollars $$$! If you haven’t read that article, I recommend reading it before continuing with this post. In a previous article, we covered the basics of Bluetooth sniffers (aka Bluetooth protocol analyzer), how they work, and even a comparison of the different BLE sniffers available on the market.
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