The difference between Bluetooth 4.0 and Bluetooth 3.0

What’s Bluetooth

The difference between Bluetooth 4.0 and Bluetooth 3.0

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994 it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

More about What’s Bluetooth technology

Bluetooth Version

The Bluetooth specification was developed as a cable replacement in 1994, based on frequency-hopping spread spectrum technology. All versions of the Bluetooth standards are designed for downward compatibility, that makes the latest standard bluetooth cover all older versions.

• Bluetooth v1.0 and v1.0B
• Bluetooth v1.1
• Bluetooth v1.2
• Bluetooth v2.0 + EDR
• Bluetooth v2.1 + EDR
• Bluetooth v3.0 + HS
• Bluetooth v4.0
• Bluetooth v4.1

The difference between Bluetooth 4.0 and Bluetooth 3.0

The Bluetooth SIG completed the Bluetooth Core Specification version 3.0 on 21 April 2009 and Bluetooth 4.0(called Bluetooth Smart) and has been adopted as of 30 June 2010. The main difference between Bluetooth 4.0 and Bluetooth 3.0:

Bluetooth 4.0 upgraded from the Bluetooth 3.0 standard, Bluetooth 3.0 + HS specification supplement. Compared with Bluetooth 3.0, the most important features of Bluetooth 4.0 is Bluetooth low energy protocols technology, it’s aimed at very low power applications running off a coin cell for several years. In addition, Bluetooth 4.0 features also included: low-cost and cross-vendor interoperability, 3ms latency, ultra-long transmission over 100 meters and AES-128 encryption.

Wireless information can be exchanged in mobile phones, PDA, wireless headsets, laptops, related peripherals and other devices by Bluetooth technology.

By using Bluetooth technology, we can effectively streamline communication between mobile communication terminal equipment, even between the device and the Internet. Thus data transmission would be more rapid and efficient, wireless communication would be more easier.

Bluetooth uses a decentralized network and fast frequency hopping and short packet technology to support point to point(P2P) and multipoint communication service(MCS), working in the global generic 2.4GHz ISM (ie industrial, scientific, medical) frequency. The data rate is 1Mbps.

Bluetooth 3.0 provides theoretical data transfer speeds of up to 24 Mbit/s, though not over the Bluetooth link itself. Instead, the Bluetooth link is used for negotiation and establishment, and the high data rate traffic is carried over a collocated 802.11 link. The feature of Bluetooth 3.0 is AMP (Alternative MAC/PHY), the addition of 802.11 as a high speed transport, which allows Bluetooth protocol stack dynamically select the correct radio frequency for any task.

Bluetooth 4.0: upgrade of Bluetooth 3.0

The most important features of Bluetooth 4.0 is Bluetooth low energy protocols technology, it’s aimed at very low power applications running off a coin cell for several years. Other features like low-cost and cross-vendor interoperability, 3ms latency, ultra-long transmission over 100 meters and AES-128 encryption, could also be used in many fields pedometer, heart rate monitors, smart meters, sensors and other things, greatly expanding the range of applications of Bluetooth technology.

Bletooth 4.0 is downward compatibility designed, which includs classic Bluetooth specification and maximum speed of 24Mbps data transfer. Three technical specification may be used alone, also clould be run simultaneously.

Bluetooth 4.0 is now moving toward commercial, in the latest models of new ipad, MacBook Air, Moto Droid Razr and Taiwan ACER Series, ASUS series and new iPhone have been all applied on the Bluetooth 4.0 technology.

Bluetooth 4.0 Features

Specifically for radio programs on high cost and power requirements, can be widely used in health care, sports and fitness, home entertainment, security and other areas.

It supports two deployment options: dual mode and single mode.

In Dual-mode, low-power Bluetooth function is integrated in the existing classic Bluetooth controller, or reproduction classic Bluetooth (2.1 + EDR / 3.0 + HS) increase in low-power chip stack, the overall structure is essentially the same, Therefore, a limited increase in costs.

Single mode is designed for highly integrated and compact devices which use a lightweight Link Layer to provide ultra-low power standby mode operation, simple device restore and reliable multipoint data transmission, also allows networked sensors Bluetooth transmission in low-power Bluetooth arrange the order flow, as well as advanced energy-saving and secure encrypted connection.

Bluetooth 4.0 main features: low energy protocols, average and standby mode power consumption.

• Use a standard coin coin cell can run for a year or even several years with low power applications
• Low cost
• Interaction of different vendors’ equipment
• Enhanced wireless coverage
• Fully backward compatible

How to Change your cellphone Bluetooth Passcode

If you have a Bluetooth device then you know how much easier it makes using your gadgets, no cables to get tangled, no adapters to leave behind. The problem is that everyone these days seems to have a Bluetooth device, which means, unless you change the passcode, there is a chance that someone might accidentally pair your device with theirs.

Tips to Change your cellphone Bluetooth Passcode

• 1,Turn on the Bluetooth device whose passcode you wish to change and unpair your devices. This removes the connection between them so you can create a new one with a different passcode number. Do this by going to your “Main Menu,” then “Settings,” then “Bluetooth” and select “Unpair” by using the navigation button and click on “OK.”
• 2,Turn off the Bluetooth function in all of the devices you wish to create a new passcode for. This will differ from gadget to gadget, but most of them require you to go to the “Menu,” then “Settings,” then “Bluetooth” and then select “Off.” This will reset the connection so you can create a new passcode.
• 3,Turn the Bluetooth connections back on for the devices that you wish to pair and make them both “Discoverable.” While in the Bluetooth connection menu select “Add a New Device.” This will give you a list of available devices. Select the device you wish to add and select “Pair Devices.”
• 4,You will be prompted for a passcode; enter a four digit number you can remember and click “OK.” You will then get a message from the other device that you are trying to pair requesting a passcode. Enter the same four-digit code into it and click “OK.” Your Bluetooth devices are now paired with a different passcode.

How to Set Up Bluetooth Hands-Free speakerphone

A Bluetooth hands-free unit is a device that fits in your ear much like an earphone. These devices allows a cell phone user to talk on his phone without having to hold onto the phone. A Bluetooth hands-free unit will not automatically work with your cell phone. Before you can start using the Bluetooth, you will have to pair the unit with your cell phone. Setting up your Bluetooth will only take a few minutes and will give you the option of using your cell phone “hands free.”

How to Set Up Bluetooth Hands-Free

Instructions

• Plug in your Bluetooth hands-free device in order to charge the device. Leave the unit plugged in for roughly an hour so that it fully charges.

• Unplug the Bluetooth hands-free device.

• Press and hold the button found in the middle of the Bluetooth hands-free device. Do this until the light found on the middle of the Bluetooth stays on.

• Turn on your cell phone. Navigate to the Main Menu screen.

• Scroll to either “Settings” or “Settings & Tools.” Whichever you choose will depend on your particular cell phone.

• Search for a “Connectivity” option. If you find this option, highlight it and then press “OK.” Otherwise, skip to the next step.

• Choose “Bluetooth” or “Bluetooth Menu.” Press “OK” to go to the next screen.

• Select “Add New Device” and press “OK.” As you do this, place the Bluetooth hands-free device next to your cell phone. The phone will then search for the Bluetooth. When the Bluetooth is found, the name of the device will appear on the cell phone screen.

• Scroll down to the listed Bluetooth device and press “OK.” You will be asked to type in a code. Enter “0000” (four consecutive zeros) and press “OK.” Your Bluetooth hands-free device will then be paired with the cell phone and you will be able to use the device.

How to Play Music on an iPhone 3.0 Through Bluetooth

Bluetooth is a wireless technology standard for exchanging information between devices over short distances, conceived as a replacement for connecting cable for data transfers.

How to Play Music on an iPhone 3.0 Through Bluetooth

 

Although the iPhone is equipped with Bluetooth, it wasn’t until Apple released the 3.0 firmware update that many of its wireless features became available.

The A2DP Bluetooth protocol streams audio between a device and suitably equipped headsets or speakers, allowing users to play music stored on the iPhone without needing a physical connection to the music player.

Things You’ll Need

• A2DP-compatible music system

Instructions

• Follow the instructions for putting your Bluetooth music system into its discovery mode.
• On the iPhone, launch the “Settings” application and open the “General” menu. Tap the “Bluetooth” setting, and slide the “Bluetooth” switch to “On.” The iPhone will now automatically search for discoverable devices nearby.
• Tap the entry for the Bluetooth music system you want to connect the iPhone to. If the Bluetooth music system requires a passkey, check its instruction manual for the key and enter it into the iPhone application when prompted.
• Launch the iPhone’s “iPod” application, and tap a music track or playlist to begin playing. The audio will be routed automatically to the paired Bluetooth music system.

Tips & Warnings

Once the iPhone has been paired with a device and its passkey entered, they will subsequently connect whenever the devices are in range and Bluetooth is switched on.