1# Welcome to BTstack 2 3BTstack is [BlueKitchen's](https://bluekitchen-gmbh.com) implementation of the official Bluetooth stack. 4It is well suited for small, resource-constraint devices 5such as 8 or 16 bit embedded systems as it is highly configurable and comes with an ultra small memory footprint. 6 7Targeting a variety of platforms is as simple as providing the necessary UART, CPU, and CLOCK implementations. BTstack is currently capable of connecting to Bluetooth-modules via: (H2) HCI USB, (H4) HCI UART + TI's eHCILL, and (H5) HCI Three-Wire UART. 8 9On smaller embedded systems, a minimal run loop implementation allows to use BTstack without a Real Time OS (RTOS). 10If a RTOS is already provided, BTstack can be integrated and run as a single thread. 11 12On larger systems, BTstack provides a server that connects to a Bluetooth module. 13Multiple applications can communicate with this server over different inter-process communication methods. As sockets are used for client/server communication, it's easy to interact via higher-level level languages, e.g. there's already a Java binding for use in desktop environments. 14 15BTstack supports the Central and the Peripheral Role of Bluetooth 5 Low Energy specification incl. LE Secure Connections, LE Data Channels, and LE Data Length Extension. It can be configured to run as either single-mode stack or a dual-mode stack. 16 17BTstack is free for non-commercial use. However, for commercial use, <a href="mailto:[email protected]">tell us</a> a bit about your project to get a quote. 18 19**Documentation:** [HTML](https://bluekitchen-gmbh.com/btstack/develop/), [PDF](https://bluekitchen-gmbh.com/btstack_develop.pdf) 20 21**Third-party libraries (FOSS):** [List of used libraries and their licenses](https://github.com/bluekitchen/btstack/blob/develop/3rd-party/README.md) 22 23**Discussion and Community Support:** [BTstack Google Group](https://groups.google.com/group/btstack-dev) 24 25 26### Supported Protocols and Profiles 27 28**Protocols:** L2CAP (incl. Enhanced Retransmission Mode and LE Data Channels), RFCOMM, SDP, BNEP, AVDTP, AVCTP, ATT, SM (incl. LE Secure Connections and Cross-transport key derivation). 29 30**Profiles:** A2DP, AVRCP incl. Browsing, GAP, GATT, HFP, HID, HSP, IOP, SPP, PAN, PBAP Client. 31 32**GATT Service Servers:** Battery (BAS), Bond Management (BMS), Cycling Power (CPS), Cycling Speed and Cadence (CSCS), Device Information (DID), Heart Rate (HRS), HID over GATT (HIDS) Device , Mesh Provisioning, Mesh Proxy, Nordic SPP, Scan Parameters (SCPS), TX Power (TPS), u-Blox SPP. 33 34**GATT Service Clients:**: ANCS, Battery (BAS), Device Information (DID), HID-over-GATT (HOGP) Host, Scan Parameters (SCPP). 35 36GATT Services are in general easy to implement and require short development time. For more GATT Services please contact us, or follow the [implementation guidelines](https://bluekitchen-gmbh.com/btstack/profiles/#gatt-generic-attribute-profile). 37 38**In Development:** LE Audio and more. 39 40It has been qualified with the Bluetooth SIG (QDID 166433) for A2DP 1.3.2, AVCTP 1.4, AVDTP 1.3, AVRCP 1.6.2, DID 1.3, GAVDP 1.3, HFP 1.8, HSP 1.2, PAN 1.0, PBAP Client 1.2, RFCOMM 1.2, SPP 1.2 BR/EDR protocol/profiles, 41BAS 1.0, CPP 1.1, CPS 1.1, CSCP 1.0, CSCS 1.0, DIS 1.1, HIDS 1.0, HOGP 1.0, HRP 1.0, HRS 1.0, SCPP 1.0, SCPS 1.0 GATT profiles as well as and GAP, GATT, IOP, SM of the Bluetooth Core 5.2 specification. 42 43For information on Apple's MFi/iAP2 and Find My profiles, please <a href="mailto:[email protected]">contact us directly</a>. 44 45## Evaluation Platforms 46 47#### Embedded Platforms: 48Build Status | Port | Platform 49---------------------| -----| ------ 50[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-esp32-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-esp32-develop) | [esp32](https://github.com/bluekitchen/btstack/tree/develop/port/esp32) | [Espressif ESP32](https://www.espressif.com/products/hardware/esp32/overview) 2.4 GHz Wi-Fi and Bluetooth Dual-Mode combo chip using [FreeRTOS](https://www.freertos.org) 51[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-max32630-fthr-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-max32630-fthr) | [max32630-fthr](https://github.com/bluekitchen/btstack/tree/develop/port/max32630-fthr) | [MAX32630FTHR ARM Cortex M4F Board](https://www.maximintegrated.com/en/products/digital/microcontrollers/MAX32630FTHR.html) with onboard [Panasonic PAN1326 module](https://na.industrial.panasonic.com/products/wireless-connectivity/bluetooth/multi-mode/series/pan13261316-series/CS467) containing [TI CC2564B Bluetooth controller](https://www.ti.com/product/cc2564) 52[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-msp432p401lp-cc256x-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-msp432p401lp-cc256x-develop) | [msp432p401lp-cc256x](https://github.com/bluekitchen/btstack/tree/develop/port/msp432p401lp-cc256x) | [TI MSP432P401R LaunchPad](https://www.ti.com/tool/MSP-EXP432P401R) with [CC2564C Dual-mode Bluetooth® Controller Evaluation Module](https://store.ti.com/CC256XCQFN-EM-CC2564C-Dual-Mode-Bluetooth-Controller-Evaluation-Module-P51277.aspx) and [EM Adapter BoosterPack](https://www.ti.com/tool/boost-ccemadapter) with additional 32768Hz quartz oscillator 53No build server | [renesas-tb-s1ja-cc256x](https://github.com/bluekitchen/btstack/tree/develop/port/renesas-tb-s1ja-cc256x) | [TB-S1JA Target Board Kit](https://www.renesas.com/eu/en/products/synergy/hardware/kits/tb-s1ja.html) with with [Dual-mode Bluetooth® CC2564 evaluation board](https://www.ti.com/tool/CC256XQFNEM) and [EM Adapter BoosterPack](https://www.ti.com/tool/boost-ccemadapter) with additional 32768Hz quartz oscillator 54[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-samv71-xplained-atwilc3000-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-samv71-xplained-atwilc3000-develop) | [samv71-xplained-atwilc3000](https://github.com/bluekitchen/btstack/tree/develop/port/samv71-xplained-atwilc3000) | [SAMV71 Ultra Xplained Ultra](https://www.microchip.com/DevelopmentTools/ProductDetails/PartNO/ATSAMV71-XULT) evaluation kit with [ATWILC3000 SHIELD](https://www.microchip.com/DevelopmentTools/ProductDetails/ATWILC3000-SHLD) 55[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-stm32-f4discovery-cc256x-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-stm32-f4discovery-cc256x-develop) | [stm32-f4discovery-cc2564b](https://github.com/bluekitchen/btstack/tree/develop/port/stm32-f4discovery-cc256x) | [STM32 F4 Discovery Board](https://www.st.com/en/evaluation-tools/stm32f4discovery.html) with [CC256xEM Bluetooth Adapter Kit for ST](https://store.ti.com/CC256XEM-STADAPT-CC256xEM-Bluetooth-Adapter-Kit-P45158.aspx) and [CC2564B Dual-mode Bluetooth® Controller Evaluation Module](https://store.ti.com/cc2564modnem.aspx) 56[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-stm32-l073rz-nucleo-em9304-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-stm32-l073rz-nucleo-em9304) | [stm32-l073rz-nucleo-em9304](https://github.com/bluekitchen/btstack/tree/develop/port/stm32-l073rz-nucleo-em9304) | EM9304 DVK: [STM32 Nucleo development board NUCELO-L73RZ](https://www.st.com/en/evaluation-tools/nucleo-l073rz.html) with [EM9304 Bluetooth Controller](https://www.emmicroelectronic.com/product/standard-protocols/em9304) 57No build server | [stm32-wb55xx-nucleo-freertos](https://github.com/bluekitchen/btstack/tree/develop/port/stm32-wb55xx-nucleo-freertos) | [P-NUCLEO-WB55 kit](https://www.st.com/en/evaluation-tools/p-nucleo-wb55.html) 58[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-wiced-h4-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-wiced-h4-develop) | [wiced-h4](https://github.com/bluekitchen/btstack/tree/develop/port/wiced-h4) | Broadcom/Cypress platforms that support the WICED SDK via H4 UART, e.g. [RedBear Duo](https://www.seeedstudio.com/RedBear-DUO-Wi-Fi-BLE-IoT-Board-p-2635.html) (BCM43438 A1), [Inventek Systems ISM4334x](https://www.inventeksys.com/wifi/wifi-modules/ism4343-wmb-l151/) (BCM43438 A1), [Inventek Systems ISM4343](https://www.inventeksys.com/products-page/wifi-modules/serial-wifi/ism43341-m4g-l44-cu-embedded-serial-to-wifi-ble-nfc-module/) (BCM43340) 59 60 61 62#### Other Platforms: 63Status | Port | Platform 64-------------------| ------|--------- 65[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-libusb-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-libusb-develop) | [libusb](https://github.com/bluekitchen/btstack/tree/develop/port/libusb) | Unix-based system with dedicated USB Bluetooth dongle 66No build server | [libusb-intel](https://github.com/bluekitchen/btstack/tree/develop/port/libusb-intel) | Unix-based system with Intel Wireless 8260/8265 Controller 67[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-posix-h4-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-posix-h4-develop) | [posix-h4](https://github.com/bluekitchen/btstack/tree/develop/port/posix-h4) | Unix-based system connected to Bluetooth module via H4 over serial port 68No build server | [posix-h4-da14581](https://github.com/bluekitchen/btstack/tree/develop/port/posix-h4-da14581) | Unix-based system connected to Dialog Semiconductor DA14581 via H4 over serial port 69No build server | [posix-h4-da14585](https://github.com/bluekitchen/btstack/tree/develop/port/posix-h4-da14585) | Unix-based system connected to Dialog Semiconductor DA14585 via H4 over serial port 70No build server | [posix-h5](https://github.com/bluekitchen/btstack/tree/develop/port/posix-h5) | Unix-based system connected to Bluetooth module via H5 over serial port 71No build server | [qt-h4](https://github.com/bluekitchen/btstack/tree/develop/port/qt-h4) | Unix- or Win32-based [Qt application](https://qt.io) connected to Bluetooth module via H4 over serial port 72No build server | [qt-usb](https://github.com/bluekitchen/btstack/tree/develop/port/qt-usb) | Unix- or Win32-based [Qt application](https://qt.io) with dedicated USB Bluetooth dongle 73No build server | [windows-h4](https://github.com/bluekitchen/btstack/tree/develop/port/windows-h4) | Win32-based system connected to Bluetooth module via serial port 74No build server | [windows-h4-da14585](https://github.com/bluekitchen/btstack/tree/develop/port/windows-h4-da14585) | Win32-based system connected to Dialog Semiconductor DA14585 via H4 over serial port 75No build server | [windows-winusb](https://github.com/bluekitchen/btstack/tree/develop/port/windows-winusb) | Win32-based system with dedicated USB Bluetooth dongle 76No build server | [windows-winusb-intel](https://github.com/bluekitchen/btstack/tree/develop/port/windows-winusb-intel) | Win32-based system with Intel Wireless 8260/8265 Controller 77No build server | [raspi](https://github.com/bluekitchen/btstack/tree/develop/port/raspi) | Raspberry Pi 3 or Raspberry Pi Zero W with built-in BCM4343 Bluetooth/Wifi Controller 78[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-daemon-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-daemon-develop) | [daemon](https://github.com/bluekitchen/btstack/tree/develop/port/daemon) | TCP and Unix domain named socket client-server architecture supporting multiple clients 79[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/java-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/java-develop) | [java](https://github.com/bluekitchen/btstack/tree/develop/platform/daemon/binding/java) | Java wrapper for daemon 80[<img src="https://buildbot.bluekitchen-gmbh.com/btstack/badges/port-mtk-develop.svg">](https://buildbot.bluekitchen-gmbh.com/btstack/#/builders/port-mtk-develop) | [mtk](https://github.com/bluekitchen/btstack/tree/develop/port/mtk) | daemon for rooted Android devices, based on Mediatek MT65xx processor, Java and C client-server API 81No build server | [freertos](https://github.com/bluekitchen/btstack/tree/develop/platform/freertos) | [FreeRTOS](https://www.freertos.org): Run BTstack on a dedicated thread, not thread-safe. 82 83## Supported Chipsets 84 85Chipset | Type | HCI Transport | SCO over HCI | BTstack folder | Comment 86---------------------------- |-----------| ----------------|------------------|----------------|--------- 87Atmel ATWILC3000 | LE | H4 | n.a. | atwilc3000 | Firmware size: 60 kB 88Broadcom UART | Dual mode | H4, H5 | Probably | bcm | Max UART baudrate 2 mbps 89Broadcom USB Dongles | Dual mode | USB | Yes | bcm | 90CSR UART | Dual mode | H4, H5, BCSP | No (didn't work) | csr | 91CSR USB Dongles | Dual mode | USB | Yes | csr | 92Cypress CYW20704 | Dual mode | H4, H5, USB | Probably | bcm | 93Cypress CYW20819 | Dual mode | H4, H5, USB | Probably | bcm | Keep CTS high during power cycle 94Cypress CYW43xxx | Dual mode + Wifi | H4, H5 | Don't know | bcm | Bluetooth + Wifi Combo Controller 95Cypress PSoC 4 | LE | H4 | n.a. | | HCI Firmware part of PSoC Creator kit examples 96Dialog Semiconductor DA145xx | LE | H4, SPI | n.a. | da14581 | Official HCI firmware used 97Dialog Semiconductor DA1469x | LE | H4, SPI | n.a | | HCI Firmware part of DA1469x SDK 98Espressif ESP32 | Dual mode + Wifi | VHCI | Yes | | SoC with Bluetooth and Wifi 99EM 9301, 9304 | LE | SPI | n.a. | em9301 | Custom HCI SPI implementation 100Intel Dual Wireless 3165, 8260, 8265 | Dual mode | USB | Probably | intel | Firmware size: 400 kB 101Nordic nRF | LE | H4 | n.a. | | Requires custom HCI firmware 102Realtek RTL8822CS | Dual Mode + WIfi | H5 | Yes | | Requires initial firmware and config 103Renesas RX23W | LE | H4 | n.a. | | HCI Firmware part of BTTS 104STM STLC2500D | Classic | H4 | No (didn't try) | stlc2500d | Custom deep sleep management not supported 105STM32-WB5x | LE | VHCI | n.a. | | SoC with multi-protocol Radio co-processor 106Toshiba TC35661 | Dual mode | H4 | No | tc3566 | 107TI CC256x, WL183x | Dual mode | H4, H5, eHCILL | Yes | cc256x | Also WL185x, WL187x, and WL189x 108 109[More infos on supported chipsets](https://bluekitchen-gmbh.com/btstack/develop/chipsets/) 110 111## Source Tree Overview 112Path | Description 113--------------------|--------------- 114chipset | Support for individual Bluetooth chipsets 115doc | Sources for BTstack documentation 116example | Example applications available for all ports 117platform | Support for special OSs and/or MCU architectures 118port | Complete port for a MCU + Chipset combinations 119src | Bluetooth stack implementation 120test | Unit and PTS tests 121tool | Helper tools for BTstack 122
