All about Bluetooth Technology: You Need to Know

Bluetooth 1.0 of 1998 the Bluetooth 5.0 of 2017, you will know everything on this wireless technology that is adapted to the usages these last 20 years.

Bluetooth is a wireless technology that everyone knows. It exists for many years and has experienced its first hours of glory at the time of the Bluetooth headsets. The technology is returned on the front of the scene with the myriad of connected objects who see the day since a few years. If at the beginning, it was limited to the connected bracelets, watches are quickly emerged with new needs in bandwidth, but also in terms of the autonomy. The standard is therefore adapted as and to new uses. Small tour of the horizon of different standards Bluetooth and of their interest to the consumer.

The BLUETOOTH and the Wi-Fi exploit the same band of frequencies, the 2.4 GHz. The comparison stops there because the Bluetooth and the Wi-Fi do not respond at all to the same uses. The Wi-Fi is much more efficient, but more energy intensive and more complex therefore more expensive. On the contrary, the Bluetooth has a lower bandwidth and rather serves to transmit the data light.

The Bluetooth has seen the light of day there is now 20 years in the Swedish laboratories of Ericsson. For the little story, the Bluetooth term refers to the Danish king Harald Blåtand who had managed to unify the kingdoms Vikings (Sweden, Denmark and Norway). The link with the new technologies? The engineers who created the Bluetooth are Swedish and have managed to unify communications phones and other devices (atria, computer, personal assistant, etc.) between them thanks to a common protocol. The name was therefore any found. The Bluetooth Special Interest Group (SIG), which is comprised of many industrialists was then formalized the specifications of the standard.

Bluetooth 1.0 to 3.0

On 20 May 1998, the Bluetooth Special Interest Group announced the specifications of the standard Bluetooth 1.0. Less than two months after, France became the champion of the world of football and in December 1999, the version 1.0b of the standard saw the day. The T39 of Ericsson, first Bluetooth phone, officially supported the standard 1.0B, but in the facts, the future version 1.1 was of the party. Compared to the Version 1.0B, Bluetooth 1.1 has corrected many bugs.

The version 1.2 of the standard brings many new features, to begin by the flow rate. If it is always limited in theory to 721 kbps, in practice, the flow is higher than the version 1.1. The reason: a higher resistance to interference (micro-wave, Wi-Fi, etc.) thanks to the frequencies which adapts to the environment.

In 2004, the Bluetooth 2.0 EDR (for Enhanced Data Rate) sees the day. The BDU is optional (hence the use of the plus sign) and it is therefore possible to find Bluetooth devices 2.0 that do not support the BDU. Yet, the EDR is one of the most large novelties of the new version. The BDU allows you to climb the flow rates to 2.1 Mbps to pass the information in a reduced amount of time, what save the battery. The Bluetooth 2.1 EDR for its part brings some improvements as a pairing easier and more secure: the SSP for Secure Simple Pairing.

In 2009, the Bluetooth SIG fate a version quite revolutionary. The version 3.0 HS (for High Speed) now uses a Bluetooth connection standard for pairing, but a connection 802.11 (as the Wi-Fi) for the transfer of data. The Bandwidth then rises to 24 Mbps. Just as the BDU, the devices can support the Bluetooth 3.0 without the HS, which therefore prevents to take advantage of the higher speed.

Finally, note that each version of the standard since the Bluetooth 1.0 until the Bluetooth 3.0 is backward compatible. If your smartphone has a Bluetooth chip 3.0, it can operate with a Bluetooth device 1.0. In contrast, a device such as a wrist using the Blueetooth 3.0 will not necessarily work with a Bluetooth phone 2.0. This will depend on the features used. For the Bluetooth 4.0, c is more complicated and we will see this just below.

Bluetooth 4.0 and 5: the growth of the Connected Objects low power consumption.

Bluetooth 4.0.

The Bluetooth standard 4.0 is a small revolution, since it splits the standard in two branches. It incorporates a part the standards Classic Bluetooth (of the Versions 1.0 to 3.0), High Speed (version 3.0) and on the other hand the new bluetooth standard low energy (the).

The real novelty therefore comes of the Bluetooth The which sharply reduces the consumption of the Bluetooth chip with a protocol really different. Manufacturers may decide to implement the Bluetooth Low Energy wireless technology only (single mode) or with the Classic Bluetooth (dual mode) to retain compatibility with older versions of the bluetooth. It is the BLUETOOTH The which has enabled the strong growth of the Connected Objects Since the consumption that it engenders is extremely reduced. Similarly, the latency for the connection and data transfer is reduced. The downside is a flow rate that is lower than the first version of the bluetooth, but the objects connected type watches or bracelets do not require a very high bandwidth.

Bluetooth 4.1

In December 2013, the version 4.1 of the bluetooth is output. It puts more emphasis on the connected objects. It is a minor update, but which must provide more comfort of use. For example, the 4G and Bluetooth will be able to communicate between them to synchronize some actions.

The improvements also concern the flows and therefore consumption since less a device is active and less it will be energy intensive. Especially, the Bluetooth 4.1 will allow a same device to have several roles. For example, shows a connected can be connected to a heart sensor to receive the information, but also to a smartphone to send and receive information.

For backward compatibility with the lower standards, there are two cases. If the device (shows Connected or other) uses the Bluetooth Low Energy wireless technology (Bluetooth Smart), it will only work with a smartphone compatible Bluetooth 4.0 The (Bluetooth Smart Ready).

If the device uses the classic Bluetooth (Bluetooth any short), it will then be able to work with some earlier versions of the Standard Taking into account the need to operate in EDR or HS.

Bluetooth 4.2

Launched in December 2014, Bluetooth 4.2 brings actually support for IPv6 protocols and 6LOWPAN to Bluetooth devices Smart, i.e. to the connected objects using the low profile Bluetooth consumption low energy (BLE).

The new specifications also inaugurate two new profiles. The Internet Protocol Support Profile (IPSP), which allows objects to connect more directly and in a more autonomous way in to the Internet. The phone would not serve more than router, gateway between the object and the Internet, then that he had until now an active role much more decisive. The specification also opened a multitude of Generic Attribute Profiles (GATT), which Standardize the way in which shall communicate all kinds of sensors (cardio-frequency meter, weighs person, thermometer…).

Bluetooth 5

Bluetooth 4.2 succeeds not the Bluetooth 4.3, nor even the Bluetooth 5.0, but the Bluetooth 5, ratified early 2017. If the numbering suggests that it is a revolution, it is in fact that of an update iterative. The Bluetooth SIG in turn adopts this trend, initiated by Google with Chrome, which is to use more than integers.

The Bluetooth 5 is nevertheless a major update which, to begin with, double the scope and quadruple the throughput of the transmission low consumption Bluetooth Low Energy wireless technology, which opens the way to, among other things, the dissemination without loss of music.

In addition, since the advent of the Bluetooth Low Energy wireless technology, Bluetooth is used in the retail for advertising purposes. The Shops install tags which detect the phones, follow their movements and their judgments. Customers with the application of the trader can thus receive promotions or targeted ads. And in this perspective, the Bluetooth 5 allows to tags to disseminate a set of information “eight times more rich.”

The role of the Profiles

To connect between them, the Bluetooth devices use profiles. The profiles contain information on the data to be transmitted and the mode of operation of the device. For example, the famous Bluetooth headsets all use the HSP (Headset Profile) which imposes the audio quality (64 Kbps), but also the operation of the buttons to disengage or adjust the volume. The profiles thus allow to get out of the products that will necessarily be compatible with all Bluetooth chips, without the need to download a special software on his phone.

With the Bluetooth Low Energy, the mode of operation of the PROFILES evolved a bit. It is now much easier to create a profile and the implement. However, it should be always pass by the Bluetooth SIG to do validate, but it would seem that this is much less long. And it is a good thing, because the industry cannot always predict certain uses and therefore is a saving of time for the consumer as the builders. This novelty participates in the effort of unification of different objects connected between them. The Bluetooth Watch therefore toward the future and it is a good idea to be able to move forward quickly on the ground of the connected objects.

The interest of the bluetooth and the connected objects

The Bluetooth has evolved to paste to new uses. According to all the experts, the market of the connected objects should explode by 2020. Fridges connected, watches, connected, toothbrush connected, everything is possible. The devices that communicate with our Smartphones already exist and the human imagination should succeed well to create new uses. According to Cisco, by 2020, it is expected to sell $50 billion of connected objects. In a-t-we really need? No, not really. Just as we did not need a smartphone there are still a few years. But you get used to it quickly to be able to book train tickets directly on his or her phone or continue to serve as a GPS for holiday, then why not for the objects connected?

the connected objects are not indispensable, but will become very helpful on a daily basis. You are at the supermarket and you do not remember more if you rest of the eggs in the fridge? Suffice it to the query to distance. All of a sudden he is to rain and your windows are large open? You love to receive statistics on your life? You want to have a nice curve in 3D representing your oral hygiene? The connected objects could well become your best friends. For the others, the Connected Objects should not become a necessity on the medium term and some even see as enemies.

Of course, the connected objects have not that of benefits. Given that they use an operating system and a wireless connection, it is possible to crack. There is therefore a risk to the security of personal data and the intrusion into the private life. The Bluetooth protocol has beautiful be secure, hackers can easily the hack to access the data of a connected object. There is also the risk of failure higher since the devices will embark more electronically with the parts less easily repairable. Finally, concerning the harmfulness of the bluetooth for health, there may be a question, even if the power of emission is largely lower than that of the Wi-Fi.

For the connected objects, the Bluetooth is paramount. It allows you to transmit information between multiple devices without excessive consumption of data and especially with a Interoperability is almost perfect. The Bluetooth has therefore not finished to talk about him.

Team Xyling

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