Bluetooth 4.2 is here – but what does it mean?

Over the past year CSR has implemented all of the important enhancements introduced in the Bluetooth 4.1 specification in its connectivity platforms, from single mode low energy and wireless audio platforms through to discrete connectivity products. This has allowed developers to employ the latest Bluetooth capabilities in their devices and expand their offerings to new markets.

Today, CSR has qualified a product compliant to version 4.2, which was officially adopted by the Bluetooth SIG last week. The update adds some significant improvements that further secure Bluetooth Smart’s position as a key enabling technology for the Internet of Things. But what are these updates?


Version 4.2 introduces three major updates to the specification: Low Energy data packet length extensions, Low Energy privacy upgrades and Low Energy secure connections. Let’s take a brief look at each one:

Low Energy data packet length extensions: The length of data packets transferred over Bluetooth Smart has been increased from 27 bytes to 251 bytes, which translates into maximum data rates of over 800kb/s. This allows for both the master and slave to negotiate the maximum length of packets to transmit and receive.

A larger data rate transfer means one thing – speedier downloads that are up to 2.6 times faster than previous Bluetooth versions. This is massively important for those developers looking to create devices that might require downloading large amounts of data – for example, regular firmware updates or downloading large data logs from sensors. Also, increased data transfer speeds and packet size reduce the opportunity for transmission errors to occur and lessen battery consumption, resulting in a much more efficient connection.

Low Energy privacy upgrades: For Bluetooth Smart settings to be truly private, address resolution of private devices had to be done in the host CPU. Now, address resolution is moved from the host CPU to the controller, which reduces power consumption on private devices. Bluetooth Smart chips will now only ‘wake up’ when someone designated as trusted is within a user’s proximity, which has the added bonus of lowering power consumption on the host CPU. So, to take a retail store using beacons as a real life example, unless a consumer has enabled permission for the beacon to engage with their device, they can no longer be tracked.

Low Energy secure connections:  Last year’s 4.1 update introduced AES encryption to deliver more secure BR/EDR connections. The 4.2 update now completes the security upgrades by adding full public key cryptography for authentication in LE using FIPS compliant algorithms, essentially updating the authentication mechanisms to the same standard as Bluetooth Classic. With this feature, dual mode devices only need to pair once and have the same fully secure connection regardless of which mode was used to authenticate.

Today, the Bluetooth SIG will make its qualification site live – please refer to this to find out which CSR products are 4.2 qualified – but you can expect to see all CSR dual mode platforms make their way onto the list.

For any questions relating to CSR’s Bluetooth Smart products, please contact or leave a comment below.

Posted in Applications and Markets, Bluetooth Smart, Connectivity, Technology | Tagged , , , , , , | 6 Comments

CSR SiRFusion™ webinar will reveal how to solve the indoor location challenge

Indoor location is a hot topic, carrying the promise of ubiquitous location and user context. Set to take social networking, analytics, content targeting and enterprise efficiency applications to a new level, the technology hails from a high pedestal.

SiRFusion™ from CSR is a new, innovative and technically disruptive solution, combining multiple sources of information including real-time Wi-Fi® signals, satellite positioning information and pedestrian dead reckoning to create high quality and accurate indoor positioning. It’s significant because it’s able to utilise these technologies and give incredibly accurate positioning performance without the need for expensive new infrastructure or site surveys.

In collaboration with GPS World magazine, myself and other experts from CSR’s SiRFusion team will be hosting a webinar on Thursday December 4th. If you are developer looking to integrate indoor positioning into an app or you would like to learn how this innovative technology can create new revenue streams for you through accurate understanding of your customers’ location indoors, please register and attend by following this link.

Register Now: Join us on December 4th at 10.00am PST / 1.00pm EST / 6.00pm GMT

In the meantime if you’re interested in finding out more about SiRFusion visit

And if you’re unable to join the webinar please get in touch with with any questions.

Webinar topics will include:

  • Commercial applications for indoor location
  • SiRFusion – solving the indoor challenge via fusion of multiple technologies, including Wi-Fi, Bluetooth® Smart, GNSS & MEMS
  • Challenges and solutions for Pedestrian Dead Reckoning & Bluetooth Smart beaconing
  • SiRFusion performance results in real world situations



  • Dave Huntingford, Director of Product Management for Location, CSR
  • Dimitri Rubin, Sr. Director of Emerging Technologies, CSR
  • Nicolas Graube, Fellow, Advanced Algorithms, CSR



Posted in Applications and Markets, Bluetooth Smart, Connectivity, Indoor Location, Technology | Tagged , , , , , , , , , , | Leave a comment

Keep track of your personal belongings with PebbleBee Bluetooth® Smart Tag

PebbleBee is a Bluetooth®-enabled tracking tag that uses the single-chip CSR1010™ to help its customers never lose their personal belongings again. Its Kickstarter campaign struck up over 3,000 backers contributing over $200,000 – ten times the original target – to help make the vision a reality. Founder and CEO David Daoura spoke to CSR to give his insight on how Bluetooth Smart is helping bring the PebbleBee to market.

What is it about the PebbleBee device that is so exciting?

People don’t want to lose things. On average you spend ten minutes a day looking for things you’ve misplaced, or 20 minutes for me! That’s lost time you’ll never get back. By placing a PebbleBee on your treasured items, you can quickly locate them and never lose anything. That’s the basic feature of the device.

Furthermore, by using the CSR1010 we can provide extra functionality for people such as remotely taking selfies with your phone, setting range alerts, keeping track of your items’ location history on Google maps, and much more. All that in an affordable, sleek and small functional device.


When developing the PebbleBee what were the top things you wanted to achieve?

Firstly we wanted to create a quality, compact product with a sleek design that is durable. The main purpose of the device is for loss prevention and lost item recovery, meaning it needed multiple embedded sensors for monitoring the environment at an extended range. It also needed to have a replaceable battery with a long life.

Why did you choose to work with CSR?

We chose to work with CSR for a number of reasons including that the CSR1010 is the most widely used Bluetooth chip. CSR also has very responsive customer support and competitive pricing. We are also interested in the cutting edge technology produced by the CSR team, for example CSRmesh networking.

How do you think the market for smart trackers and sensors will evolve over the next five years?

It really depends on the battery and Bluetooth chip technology. Power management is what it all boils down to. The more power you can harness or conserve for a small device, the more user friendly it is. This translates to more people adopting and using this Internet of Sensors market. We aren’t just a manufacturer of tracker devices, we mainly focus on sensors. People want to know how active their pets are while they’re at work or who ripped that pillow apart at 3:00am. With sensors all of that information is available to you from the comfort of your mobile phone or tablet.

In the next five to seven years from now, I think the smart tracker market will be as big, if not bigger than the cell phone market is today. The devices will be so small that you can stick them on paper and won’t know the difference. High value assets in mail, items, toys and even merchandise and clothing will all have some sort of tracking device on them. Retailers will use them as they do today with RFID, but with Bluetooth Smart instead. The key is improved battery technology that is smaller, more efficient, and thin as a film and Bluetooth Smart chips and sensors that hardly consume any energy.

Find out more about CSR Bluetooth Smart products here:


Pebblebee founders Nick Pearson-Franks (left) and David Daoura (right)

Pebblebee founders Daniel Daoura (left) and Nick Pearson-Franks (right)

Posted in Applications and Markets, Bluetooth Smart, Connectivity, Technology, Wearables | Tagged , , , , , , , | Leave a comment

Taking automotive positioning to the next level

We’ve demoed a lot of new and improved solutions at Telematics Munich 2014 – the connected car just gets more intricate and exciting with each event. For me however, the most exciting of CSR’s announcements has been the latest software releases for our SiRFstarV™ 5ea auto-grade quad-GNSS location platform. We are now offering concurrent use of GPS and BeiDou (BDS) satellite constellations as well as major updates to the our SiRFDRive® software dead reckoning (DR) algorithms (you can read the press release for more details here).

Many Tier 1 suppliers and OEMs are frustrated with the overall positioning performance and associated route guidance in challenging environments such as Chicago and Tokyo. In particular, they struggle with corner cases where inaccurate positioning leads the navigation application to believe the vehicle is on the wrong street or at the wrong place on the right street.

This can result in incorrect guidance which will persist until the system recovers and gets an accurate position.  In the case of telematics systems supporting emergency responses and stolen vehicle tracking services, providing accurate positioning at all times and in all environments is critical for effective service delivery.

Another benefit is that because GNSS and DR integrate with the navigation applications and thereby simplifying map matching, the overall solution is far more accurate. It reduces the efforts for such integration activities (and associated costs), and it also shortens the time to market of the navigation and telematics systems.

The two key ingredients in making the improvements are:

1) Concurrent multi-constellation support using GPS + GLONASS provides access to more satellites, increasing availability and the accuracy of the GNSS solution and;

2) The improved DR algorithms include elements such as better calibration of the MEMS sensors and vehicle inputs, as well as more intelligent use of the MEMS sensor and GNSS satellites in the GNSS + DR Kalman Filters

CSR is keeping a keen eye on the development of MEMS sensors since we are seeing an explosive increase in demand primarily from smartphone and tablet applications. MEMS sensor performance improvements along with decreasing cost for the sensors themselves will provide opportunities for continued SiRFDRive performance improvements.

At Telematics Munich we presented the capabilities of SiRFDRive on SiRFstarV 5ea using a video of Chicago illustrating the challenges for a GNSS system alone in providing accurate positioning in an urban canyon environment. The video, which you can view below, contrasts this to the benefits of adding the MEMS sensor inputs to the GNSS measurements in SiRFDRive.

If you are interested in a real life demo please don’t hesitate to get in touch by emailing



Posted in Automotive Infotainment, Indoor Location, Technology | Tagged , , , , , , , , , , , | 1 Comment

Internet of Things enabler CSRmesh™ named CES Innovation Awards Honoree

I’m pleased to announce that CSR has been named a 2015 CES Innovation Awards Honoree in recognition of our CSRmesh™ protocol.  Products entered in this prestigious program are judged by a panel of independent industriaInnovHon2015l designers, engineers and members of the trade media to honor outstanding design and engineering in cutting edge consumer electronics products. We believe CSRmesh will truly revolutionise development of not just consumer smart home products, but also smart buildings in general – even hotels and warehouses.

CSRmesh allows any device to send messages into a mesh network that other devices can receive. These devices need not be adjacent; instead, devices relay messages to increase coverage. Information in messages can action other related events: walk up to your front door and touch the handle to unlock it; the lights and heating turn on, the security system disables and the radio tunes into the channel you’ve just been listening to in the car. Allowing everything to be linked – but without requiring any central management or box – means that the occupier can build their smart home one device at a time. Each new device acquired makes their home smarte.

Our main objective with CSRmesh is to facilitate smart home automation without the hassles of existing systems: no vendor lock-in, no single point of failure, easy control from devices people already own and whole-building coverage. The innovation is in leveraging the ubiquity of Bluetooth – in phones, tablets and laptops – to control and monitor other devices. Using CSRmesh, we can exchange messages within a single room, or across a whole building. You can find out more about it here, as well as details of our CSRmesh Development Kit here.

Products chosen as CES Innovation Honorees reflect innovative design and engineering in some of the most cutting edge tech products and services coming to market. It’s clear that the panel value the benefits and unique features that CSRmesh can bring to the IoT – the creation of an industry-wide ecosystem of interoperable devices that can work together to make our lives easier.

CSRmesh will be displayed at CES from January 6-9, 2015 in Las Vegas. If you’re interested in a demo drop us an email at

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Meeting the UK’s big appetite for truly wearable technology

Sales of wearable devices in the UK is on the rise, according to a new survey from consumer insights research company GfK. Ownership of wearable tech amongst Brits has shot up with a total of 420,000 units bought since January 2014, reaching a combined value of £51 million.

The research, undertaken to investigate the main selling points for wearable tech, suggests that the crossover between technology and fashion in wearables is likely to increase. 73% of those surveyed said that they would consider wearing clothing or jewellery items with integrated trackers.

Earlier this year we conducted our own survey of consumers’ views on wearable technology and our results pointed to a similar trend. The research found that 72% of Brits agree that it’s important that wearable technology devices look good and 67% think that it’s important that their wearables fit with their personal style.

However, GfK has found that companies are not yet meeting these expectations. The report states for example that there is a widespread perception that smartwatches are regarded as “gadgets for geeks” and haven’t yet achieved mainstream appeal desired by manufacturers. This should mean that we can expect new and exciting designs ahead, prompting even more growth for the industry.

In order to prove that a device can balance being both fashionable and functional, we at CSR decided to develop a range of connected jewellery ourselves.

Bluetooth® Smart Jewellery

Bluetooth® Smart Jewellery

Designed in conjunction with boutique jeweller Cellini, the pendant-style connected necklaces contained CSR’s innovative Bluetooth® Smart solution – the CSR1012™. The integrated electronics enabled the wearer to customise the colour and brightness of the integrated LED to suit their mood or to coordinate with a particular outfit.

What is also clear from this report is that the challenges faced by manufacturers extend beyond just looks. Those surveyed by GfK ranked battery life, comfort and functionality as almost equal to or more important as the device’s design. What CSR’s connected pendant proves is that manufacturers can achieve great aesthetics as well as battery life, small form factor and fast connectivity.

If you are interested in learning more about the CSR1012, visit our product page where you can purchase a CSR µEnergy Development Kit.

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CSR’s DDFA amplifier gives Bluesound Powernode star power

What Hi-Fi? magazine recently awarded the Bluesound Powernode a fantastic five stars in this review. From my perspective this is fantastic as the audio performance level achieved by the Powernode is substantially provided by CSR’s DDFA amplifier technology. The reviewer concludes that “the Powernode is one of the most musical systems we’ve heard of this ilk, presenting itself in a very likeable manner indeed” – it’s certainly a glowing endorsement of our DDFA technology.

DDFA stands for ‘Direct Digital Feedback Amplifier’ and products using this technology invariably achieve outstanding audio performance levels; often compared favourably with the best linear amplifiers. We achieve that performance with our unique patented feedback architecture which compensates for any errors introduced by the amplifier power stage or power supply – no other digital amplifier technology can do this.

Sound quality is just one leading feature provided by DDFA. The DDFA architecture is Class D and so achieves a very high efficiency – over 90% – meaning a smaller power supply can be used, there’s far less heat dissipation and so the product form factor can be smaller and more elegant.

DDFA input is digital, meaning it can readily accept digital audio sources without the need for data conversion; this ensures a simpler solution  and maintains the performance level at its best.

In the case of the Powernode, a significant feature comes from DDFA digital input ability to support High Resolution Audio (HRA) – up to 32 bits and with a sample rate up to 192kHz – the Powernode rating of 24bit/96kHz is very attractive to audio aficionados. This requirement for HRA is definitely one that we are going to see more of in the future and not only in this type of higher end product.

You can pick up more on this point by reading What Hi-Fi competitive review of multi-room audio where the Bluesound product comes out on top. High-res is the leading feature which, along with the quality hi-fi sound, gives the product the winning edge.

To find out more about DDFA, visit our product page. Or watch the below video in which I give an overview of the features and benefits of DDFA.

Posted in Technology, Voice & Music | Leave a comment

Want to take advantage of the IoT? Download our latest CSRmesh™ webinar

Are you a developer looking to create a new Bluetooth® Smart powered IoT device? If so, then download the second instalment of our CSRmesh™ webinar series to find out how it could help you.

We also have the first webinar of the series available to download, which discusses the key features and use cases of CSRmesh.

CSRmesh offers a number of advantages, allowing developers to increase the amount of devices controlled by a mobile device, offering high levels of security to the network and supporting a number of use-cases, in the home and the enterprise.

CSRmesh Development Board

The latest session was hosted by Staff Engineer Dmitry Shipilov, who covered:

  • CSRmesh architecture and its operation
    • Bearer layer which transmits and receives messages and passes them onto the transport layer
    • Transport layer which decrypts messages encrypted with the network key
    • Mesh association protocol layer which securely distributes the network key to the newly added device
    • Mesh control protocol which enables control and monitoring of devices within a specific network
  • Overview of the software implementation – on-chip and Android
  • The support developers can get on our forumwebinars, wiki and video channel


Interested in learning more about CSRmesh? Visit our web page If you would like to purchase a CSRmesh Development Kit then take a look at the product page.

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Want to offer consumers improved audio quality on their long car journeys? Experience our aptX® enabled connected car at AES LA


At this year’s AES show in LA, we will be showcasing the different uses of aptX® in a car and the benefits it can bring to drivers and passengers alike.

The connected car at AES will include:

  • Head unit use case – we will we demonstrating the difference between aptX and the default codec for Bluetooth in the head unit. Attendees will be able to hear the enhanced audio performance delivered by aptX over SBC while sitting in the vehicle
  • Rear seat entertainment use case – by using iPad’s in the back seat of vehicles, we will showcase the improved latency that aptX offers, ensuring that visual and audio sync up for passengers

aptX has become the de facto wireless audio codec of choice for consumers in home and personal audio. Here’s why we expect the same uptake in a car:

  1. Growth of wireless audio

aptX is integrated into the majority of flagship smartphones on the market (including devices like the Samsung Galaxy S5, Sony Xperia Z1 and HTC One), giving consumers the potential to stream high quality audio to the head unit. Traditionally, there has been a general consumer complaint about the performance of Bluetooth audio in vehicles being much worse than radio or CD performance but aptX solves this issue. This, combined with the fact that the CD is increasingly becoming an optional component in new models, is driving Bluetooth audio in the vehicle.

And now that some of the world’s leading makers of car infotainment systems are taking notice this could soon become the norm. JVCKenwood and Clarion have chosen to integrate the aptX codec into their products, such as navigation and audio systems and we’ve had interest from many more. aptX is a brand consumers now trust for Hi-Fi audio and with automotive electronics manufacturers such as Alps Electric selecting aptX, drivers can stream pure wireless audio over Bluetooth to their car speakers without any loss in sound quality.

  1. Long car journeys

The average Briton spends 10 hours a week – over 500 hours a year – in their car, and this is similar all around the world, so it makes sense that tech companies would focus on making the driving experience smoother, more efficient and more enjoyable.

Vehicle manufacturers spend significant amounts of R&D money to ensure each vehicle’s audio system is tuned to offer the best possible experience, greatly surpassing anything that the average consumer will spend on their home audio. Using aptX, vehicle designers can ensure that there is no audio degradation over Bluetooth in the vehicle. As poor audio can actually have a negative health effect on those who listen to music for prolonged periods, aptX provides benefits to the likes of delivery men and lorry drivers who spend a lot of time in their vehicles.

  1. Future-proofing vehicles

In a fragmented market of many handset ecosystems that have traditionally caused patchy interoperability, Bluetooth offers universal connectivity, enabling all devices with aptX built-in to link up to the vehicle. As the life cycle of smartphones is much shorter than vehicles, this makes life easier for both customers and vehicle engineers as they can ensure that future mobile devices will connect and provide audio to automobiles.

Visit stand no. 1453 at AES LA to see the connected car in action and learn more about the improved experience aptX can bring to a vehicle.

Posted in Technology, Voice & Music | Leave a comment

Get your mbed connectivity fix with CSR at ARM TechCon

Back in February we announced that we had joined the ARM® mbed™ platform, an industry venture designed to nurture the growth of the Internet of Things (IoT), as a component partner. This partnership makes it easy for mbed community members to integrate CSR’s Bluetooth®Bluetooth SmartWi-Fi® and GPS connectivity solutions into existing IoT microcontroller projects.

With ARM TechCon now underway, we are present at mbed zone booth 900 today from 15.00-16.00 in the main hall showing the following:

–          A GPS board based on SiRFStarV

–          A Bluetooth Smart board based on CSR1010™

Notification of when these boards will be available will be shared on CSR’s partner page

Whether you’re a developer who wants to build a consumer wireless home security system or you require connection for sensors to an industrial control system, come and talk to us to discover how we can help ease your efforts in getting your connected products to market quickly, easily and cost-effectively.

Posted in Bluetooth Smart, Indoor Location | Leave a comment