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# Welcome to BTstack

BTstack is [BlueKitchen's](http://bluekitchen-gmbh.com) implementation of the official Bluetooth stack.
It is well suited for small, resource-constraint devices
such as 8 or 16 bit embedded systems as it is highly configurable and comes with an ultra small memory footprint.
A minimal configuration for an SPP server on a MSP430 can run in 32 kB FLASH and only 4 kB of RAM.

It connects to the Bluetooth modules via different Bluetooth HCI transport layers (e.g., HCI H4 UART and
H5 the "Tree-Wire" protocol). The various platforms can be easily targeted by providing the necessary
UART, CPU, and CLOCK implementations.

On smaller embedded systems, a minimal run loop implementation allows to use BTstack without a Real Time OS (RTOS).
If a RTOS is already provided, BTstack can be integrated and run as a single thread.

On larger systems, BTstack provides a daemon that connects to a Bluetooth module.
Multiple applications can communicate with this daemon over different inter-process communication methods.

BTstack supports both, the Central and the Peripheral Role of Bluetooth 4.0 Low Energy specification.
It can be configures as both a single mode or a dual mode stack.

BTstack is free for non-commercial use. For commercial use, <a href="mailto:[email protected]">tell us</a>
a bit about your project to get a quote.
The Serial Port Profile (SPP) and the Bluetooth 4.0 Low Energy Peripheral role (LE Peripheral) have been qualified with
the Bluetooth SIG (QD ID 54558). This summer, we plan to qualify for Bluetooth Core 4.2,
together with LE Central, PAN/BNEP and HSP.

## Documentation
For starters, download the [BTstack Manual](https://github.com/bluekitchen/btstack/raw/master/docs/manual/btstack-manual.pdf)
and look for an Architecture overview and the Getting started example for MSP430.

## Supported Protocols
* L2CAP
* RFCOMM
* SDP
* BNEP
* ATT
* SM


## Supported Profiles
* GAP
* IOP
* SPP
* PAN
* GATT

Coming soon: HSP, HFP, and more.

## Evaluation Platforms

#### Embedded Platforms:
* [EZ430-RF256x Bluetooth Evaluation Tool for MSP430](http://www.ti.com/tool/ez430-rf256x)
* [MSP430F5438 Experimenter Board for MSP430](http://www.ti.com/tool/msp-exp430f5438) with [Bluetooth CC2564 Module Evaluation Board](http://www.ti.com/tool/cc2564modnem)
* [MSP-EXP430F5529LP LaunchPad](http://www.ti.com/ww/en/launchpad/launchpads-msp430-msp-exp430f5529lp.html#tabs) with [Bluetooth CC2564 Module Evaluation Board](http://www.ti.com/tool/cc2564modnem) and [EM Adapter BoosterPack](http://www.ti.com/tool/boost-ccemadapter) with additional 32768Hz quartz oscillator
* [STM32 Nucleo development board NUCLEO-F103RB](http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1847/PF259875) with [Bluetooth CC2564 Module Evaluation Board](http://www.ti.com/tool/cc2564modnem) and [EM Adapter BoosterPack](http://www.ti.com/tool/boost-ccemadapter) with additional 32768Hz quartz oscillator
* [Microchip's PIC32 Bluetooth Audio Development Kit](http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=DV320032)

#### Other Platforms:
* posix: Unix-based system talking to Bluetooth module via serial port
* libusb: Unix-based system talking via USB Bluetooth dongle
* daemon: TCP and Unix domain named socket client-server architecture supporting multiple clients
* java: Java wrapper for daemon
* iOS: daemon for iOS jailbreak devices, C client-server API
* mtk: daemon for rooted Android devices, based on Mediatek MT65xx processor, Java and C client-server API


## Supported Chipsets
Chipsets             | Status
--------------       | ------
TI CC256x, WL183x    | complete incl. eHCIll support (chipset-cc256x)
CSR 8811, 8510       | H4 only (chipset-csr)
STM STLC2500D        | working, no support for custom deep sleep management (chipset-stlc2500d)
EM 9301              | experimental use on Arduino Shield (chipset-em9301)
CSR USB Dongles      | complete
Broadcom USB Dongles | complete

## Discussion and Community Support
[BTstack Google Group](http://groups.google.com/group/btstack-dev)