SwaraLink

5 ms·

1.
by SwaraLink 3y ago
It’s actually possible to use the debugger on the NRF dev kits to flash/debug custom PCBs with NRF chips. So a separate (more expensive) JTAG debugger is in fact not required.
2.
by SwaraLink 5y ago
BLE has a privacy feature that enables MAC address rotation, but it isn't a requirement. Apple products and Android phones use the privacy feature, but other than that most products don't. The possibility of tracking someone via t
3.
by SwaraLink 5y ago
Apple devices all use a private resolvable Bluetooth address that changes every 15 minutes. That, along with a cryptographic payload, protect against this. Aside from Apple products and Android phones, most other Bluetooth Products do not u
4.
by SwaraLink 5y ago
Not sure I agree here. Most Bluetooth Low Energy devices (aside from Apple Devices and Android phones) don't make use the privacy feature and therefore their device address can be linked to a specific product. Many Bluetooth products h
5.
by SwaraLink 5y ago
There’s no actual Bluetooth connection that happens here. The AirTag or other FindMy-enabled device is purely transmitting. The packets being transmitted are Bluetooth Low Energy advertisements (sometimes referred to as “beacons”). Any Appl
6.
by SwaraLink 5y ago
Private resolvable addresses are a BLE thing, but very few devices (aside from Apple products and Android phones) actually use them. It’s a shame, really, because most embedded BLE stacks support the feature. My company is working on a plat
7.
by SwaraLink 5y ago
It’s a little bit better than that, in that only some nodes rebroadcast everything while you can have lower-power nodes be primarily in transmit mode. But yes, I think the spec could use a lot of improvement. It does seem like there’s a lot
8.
by SwaraLink 5y ago
The Bluetooth Mesh standard actually is based on a Bluetooth 4.0 feature set (basic advertising and scanning), so really any BLE device can support it. The problem is that the software is complicated, so typically only newer devices have so
9.
by SwaraLink 5y ago
Easy to say, and I can’t know for sure exactly what factored impacted Broadcom’s decisions here, but I can tell you that chip manufacturers are under extreme pressure to keep costs down, which means that they may under-spec systems at times
10.
by SwaraLink 6y ago
Bluetooth has the Secure Simple Pairing (SSP) feature, and Bluetooth Low Energy has the LE Secure Connections feature, which both use Elliptic Curve Diffie-Hellman Key Exchange and therefore is protected against passive eavesdropping. The s
11.
by SwaraLink 6y ago
No, iOS devices enable Bluetooth Low Energy advertising pretty much the entire time that Bluetooth is on. This is used for features such as handover and Airdrop (and now for contact tracing, if enabled).
12.
by SwaraLink 6y ago
SEEKING WORK AND SEEKING FREELANCER | San Diego, CA | Remote We are a small consulting and design services firm focused on Bluetooth and Bluetooth Low Energy (BLE) technology. We design Bluetooth products (hardware and software) and assist
13.
by SwaraLink 6y ago
Nordic provides some easy-to-use tools and examples for encrypting and signing firmware images when using a bootloader for in-field updates. I would expect that most products based on the nRF52 that support firmware updates encrypt the imag
14.
by SwaraLink 7y ago
I don't know of any because I haven't tested too many, but LE Secure Connections has been around since the Bluetooth 4.2 spec, which was adopted in 2014. The feature is supported by most single-mode BLE chipsets / stacks that
15.
by SwaraLink 7y ago
Sadly, many BLE keyboards on the market today are still not using the LE Secure Connections feature during pairing. The LE legacy pairing algorithm does not use Elliptic Curve Diffie-Hellman Key Exchange, and is easily susceptible to having
16.
by SwaraLink 7y ago
That is correct. The vulnerability note clearly states that this only impacts "Bluetooth BR/EDR Core v5.1 and earlier". "BR/EDR" is the technical term for Classic Bluetooth; in other words not Bluetooth Low Ene
17.
by SwaraLink 7y ago
I think the biggest misconception here is the belief that Bluetooth LE beacons are tracking phones. The beacons themselves operate as transmit-only and don’t receive any data and therefore don’t perform any tracking themselves. The more cor
18.
by SwaraLink 7y ago
It's true that only paying companies (associate membership or higher) can participate in working groups and contribute to the specifications, but once a specifications has been adopted it becomes public. All of the adopted core specifi
19.
by SwaraLink 8y ago
And this article doesn't even mention Bluetooth Mesh. Yes, it's still very new and yet to be deployed to the extent of Z-Wave and ZigBee, but with the ability to directly connect to smartphones Bluetooth Mesh could overtake those
20.
by SwaraLink 8y ago
With the CC26xx parts you can use a 32kHz RCOSC and get accurate enough timing for BTLE connections, so with the CC2652RB you should be able to have true "crystal-less" Bluetooth LE.