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we are a team of four,invented this app for bluetooth on 19 jan 2017. we created this app with the help of prof. mayur kumar nanda.we want everybody to use bluetut app for their day to day requirements and utilise it as much as possible.thank you.
we are currently pursuing bachelor of engineering from vidyalankar institute of technology.
Founded : 2017
Designation : Engineers
Mission : To carry forward the information in the best possible way and apply the theoretical knowledge in the practical way.
email : email@example.com
version 4.0 LE
The Bluetooth SIG completed the Bluetooth Core Specification version 4.0 (called Bluetooth Smart) and has been adopted as of 30 June 2010. It includes Classic Bluetooth, Bluetooth high speed and Bluetooth low energy protocols. Bluetooth high speed is based on Wi-Fi, and Classic Bluetooth consists of legacy Bluetooth protocols.
Bluetooth low energy, previously known as Wibree, is a subset of Bluetooth v4.0 with an entirely new protocol stack for rapid build-up of simple links. As an alternative to the Bluetooth standard protocols that were introduced in Bluetooth v1.0 to v3.0, it is aimed at very low power applications running off a coin cell. Chip designs allow for two types of implementation, dual-mode, single-mode and enhanced past versions. The provisional names Wibree and Bluetooth ULP (Ultra Low Power) were abandoned and the BLE name was used for a while. In late 2011, new logos "Bluetooth Smart Ready" for hosts and "Bluetooth Smart" for sensors were introduced as the general-public face of BLE.
In a single-mode implementation, only the low energy protocol stack is implemented. STMicroelectronics, AMICCOM, CSR, Nordic Semiconductor and Texas Instruments have released single mode Bluetooth low energy solutions.
In a dual-mode implementation, Bluetooth Smart functionality is integrated into an existing Classic Bluetooth controller. As of March 2011, the following semiconductor companies have announced the availability of chips meeting the standard: Qualcomm-Atheros, CSR, Broadcom and Texas Instruments. The compliant architecture shares all of Classic Bluetooth’s existing radio and functionality resulting in a negligible cost increase compared to Classic Bluetooth.
Cost-reduced single-mode chips, which enable highly integrated and compact devices, feature a lightweight Link Layer providing ultra-low power idle mode operation, simple device discovery, and reliable point-to-multipoint data transfer with advanced power-save and secure encrypted connections at the lowest possible cost.
General improvements in version 4.0 include the changes necessary to facilitate BLE modes, as well the Generic Attribute Profile (GATT) and Security Manager (SM) services with AES Encryption.
Core Specification Addendum 2 was unveiled in December 2011; it contains improvements to the audio Host Controller Interface and to the High Speed (802.11) Protocol Adaptation Layer.
Core Specification Addendum 3 revision 2 has an adoption date of 24 July 2012.
Core Specification Addendum 4 has an adoption date of 12 February 2013.
The Bluetooth SIG officially unveiled Bluetooth 5 during a media event in London on 16 June 2016. Its new features are mainly focused on emerging Internet of Things technology. The release of products is scheduled for late 2016 to early 2017.
One change on the marketing side is the dropping of the point number, so that it is just "Bluetooth 5" (and not Bluetooth 5.0 or 5.0 LE like for Bluetooth 4.0). The change was purportedly for the sake of "simplifying marketing, and communicating user benefits more effectively."
On the technical side, Bluetooth 5 has quadruple the range, double the speed, and provides an eight-fold increase in data broadcasting capacity of low energy Bluetooth transmissions compared to Bluetooth 4.x, which could be important for IoT applications where nodes are connected throughout a whole house. Bluetooth 5 supports transfers at 2 Mbit/s instead of the usual 1 Mbit/s. Most impressive specs about Bluetooth 5 is that the bandwidth can be adjusted. In addition it adds functionality for connectionless services like location-relevant information and navigation of low energy Bluetooth connections.
The major areas of improvement are:
Slot Availability Mask (SAM)
2 Mbit/s PHY for LE
LE Long Range
High Duty Cycle Non-Connectable Advertising
LE Advertising Extensions
LE Channel Selection Algorithm #2
Features Added in CSA5 - Integrated in v5.0:
Higher Output Power
The following features were removed in this version of the specification:
Version 3.0 + HS of the Bluetooth Core Specification was adopted by the Bluetooth SIG on 21 April 2009. Bluetooth v3.0 + HS 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 colocated 802.11 link.
The main new feature is AMP (Alternative MAC/PHY), the addition of 802.11 as a high speed transport. The High-Speed part of the specification is not mandatory, and hence only devices that display the "+HS" logo actually support Bluetooth over 802.11 high-speed data transfer. A Bluetooth v3.0 device without the "+HS" suffix is only required to support features introduced in Core Specification Version 3.0 or earlier Core Specification Addendum 1.
Faster Connection and Discovery
Adaptive frequency-hopping spread spectrum (AFH), which improves resistance to radio frequency interference by avoiding the use of crowded frequencies in the hopping sequence.
Higher transmission speeds in practice, up to 721 kbit/s, than in v1.1.
Extended Synchronous Connections (eSCO), which improve voice quality of audio links by allowing retransmissions of corrupted packets, and may optionally increase audio latency to provide better concurrent data transfer.
Host Controller Interface (HCI) operation with three-wire UART.
Ratified as IEEE Standard 802.15.1–2005
Introduced Flow Control and Retransmission Modes for L2CAP.
version 1.0 and 1.0B
Versions 1.0 and 1.0B had many problems and manufacturers had difficulty making their products interoperable. Versions 1.0 and 1.0B also included mandatory Bluetooth hardware device address (BD_ADDR) transmission in the Connecting process (rendering anonymity impossible at the protocol level), which was a major setback for certain services planned for use in Bluetooth environments.
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