BTstack is BlueKitchen's 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, tell us 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.

For starters, check the BTstack Manual

• HTML
• PDF

• L2CAP
• RFCOMM
• SDP
• BNEP
• ATT
• SM

• GAP
• IOP
• SPP
• PAN
• GATT

Coming soon: HSP, HFP, and more.

Status	Platform
	EZ430-RF256x Bluetooth Evaluation Tool for MSP430
	MSP430F5438 Experimenter Board for MSP430 with Bluetooth CC2564 Module Evaluation Board
	MSP-EXP430F5529LP LaunchPad with Bluetooth CC2564 Module Evaluation Board and EM Adapter BoosterPack with additional 32768Hz quartz oscillator
	STM32 Nucleo development board NUCLEO-F103RB with Bluetooth CC2564 Module Evaluation Board and EM Adapter BoosterPack with additional 32768Hz quartz oscillator
	Microchip's PIC32 Bluetooth Audio Development Kit

Status	Platform
	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

BTstack Google Group