How Bluetooth 4.2 will make your home smarter

The Bluetooth 4.2 standard was announced back in December, but it’s back in the news with the launch of the Samsung Galaxy Note 5 and Samsung Galaxy S6 Edge+.

That’s because these two high-end phablets are the first smartphones to include Bluetooth 4.2.

So what exactly is Bluetooth 4.2? Well, according to the Bluetooth Special Interest Group, “Bluetooth 4.2 makes Bluetooth Smart even smarter, faster and the ideal wireless technology for the Internet of Things.”

But what exactly does all that mean?

Related: Samsung Galaxy Note 4 vs Note 5

Galaxy note 5

Enabling IoT


4.2 enables devices to connect directly to the internet over a

Bluetooth connection through IPv6/6LoWPAN. It needs no got-between


This instantly makes Bluetooth a far more useful connection standard in the so-called Internet of Things (IoT).


it means that Bluetooth-equipped devices can communicate directly and

quickly with one another. That includes smart home devices such as

lights, locks, thermostats, and any other household appliance that

offers remote control over an internet connection.

With Bluetooth 4.2, the standard can essentially become the very foundation for the fledgling Internet of Things.

Related: Samsung Galaxy Note 5 vs Galaxy S6 Edge+

Improving Bluetooth Smart

The concept of Bluetooth Smart is at the heart of Bluetooth 4.2, and it’s much improved with it.


Smart is the brand name attributed to a specific strand of the standard

that came about with Bluetooth 4.0. It particularly refers to the

wireless connection standard’s newfound low-power capabilities.

Bluetooth Smart enables connectivity between simple, compact, and often

self-powered electronic devices like healthcare and fitness trackers, as

well as smart home devices.

With Bluetooth 4.2, such Bluetooth

Smart devices are even more secure, with FIPS-compliant encryption

keeping confidential data safe. It’s also a lot tougher for outside

parties to track Bluetooth Smart devices unless permission is granted by

the user.

Bluetooth Smart devices will also consume even less power than before.

Related: How much RAM do you really need in a phone?


Faster and more stable


4.2 also improves the data transfer speeds over Bluetooth connections

by as much as two-and-a-half times, while packet size has increased by

ten times. This will lead to significantly faster and more stable

firmware updates for Bluetooth Smart devices.

It should also be

noted that Bluetooth 4.2 doesn’t replace Bluetooth 4.0 (or indeed 4.1).

Rather, it extends the functionality of those earlier standards.


a result, there shouldn’t be any compatibility issues with any existing

Bluetooth gear. Having said that, in order to benefit from that

aforementioned data transfer speed and packet size increases, as well as

the internet connectivity, fresh hardware will be required.

What about smartphones?


you’ve probably discerned by now, the improvements brought about by

Bluetooth 4.2 don’t really add that much to smartphones like the Samsung

Galaxy Note 5. They’re really more concerned with simpler smart devices

operating under the Bluetooth Smart brand.

What it will add is

an extra layer of security to a phone. It will no longer we quite so

easy to exploit your phone’s open Bluetooth connection when out and

about, nor will so-called ‘beacons’ in retail spaces be able to make

contact or track you without your approval. There are the usual bug

fixes and efficiency improvements that any update brings, too.


in terms of general features, you probably won’t notice any difference

when hooking your Note 5 up to your usual Bluetooth headset or speakers.