1# Change Log 2All notable changes to this project will be documented in this file. 3 4The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) 5and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html). 6 7## [Unreleased] 8 9### Added 10- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 11- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 12- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 13 14### Changed 15 16### Fixed 17- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 18- HSP HS: accept incomming SCO connection 19- SM: fix iteration over LE Device DB entries for bonding and address resolving 20 21## Changes February 2018 22 23### Added 24- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 25- SM: new event SM_EVENT_PAIRING_COMPLETE 26- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 27- GAP: add gap_delete_all_link_keys 28 29### Changed 30- GATT Client: round robin for multiple connections 31- ATT Dispatch: round robin for ATT Server & GATT Client 32- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 33- btstack_link_key_db: addition functions for link key iteration 34- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 35- CSR: set all keys in psram instead of default 36 37### Fixed 38- tc3556x: fix startup after baud rate change 39 40 41## Changes January 2018 42 43### Added 44- Port for Windows with Zephyr HCI Firmware connected via serial port 45- em9304: upload patch containers during HCI bootup 46- Makefile for STM32-F4Discovery port 47- support for console out via SEGGER RTT 48- LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub) 49- LE Streamer Client can send as fast as possbile as well 50- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 51 52### Changed 53- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 54- GAP: gap_set_connection_parameters includes scan interval and window params 55- GATT Client: GATT_EVENT_MTU indicates max MTU 56- ATT DB Util: attribute handle is returned for new Services and Characteristics 57 58### Fixed 59- Windows: retry serial port operations if not all bytes have been read/written 60- HFP: avoid buffer overflows setting up messages 61- SBC Decoder: improved error handling for invalid SBC audio data 62- GAP: fix Connection Parameter Response in Central role 63- ATT DB Util: update pointer to database in case of realloc 64- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 65- GAP: release HCI Connnection after gap_le_conne 66- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 67 68 69## Changes December 2017 70 71### Added 72- Introduced btstack_network.h network interface abstraction 73- btstack_network_posix implementation using Linux tun/tap interface 74- WICED: support for btstack_stdin (HAVE_STDIN) 75- GATT Server: Writes to GATT Client Characteristic Configuration are stored in TLV and restored on reconnect. The db.h file generated from db.gatt needs to be re-created. 76- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 77- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 78- LE Device DB TLV: overwrite oldest entry if no free entries available 79- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 80- Example/hid_host_demo with HID parser and support for basic US keyboard layout 81- EM9304: custom HCI Transport implementation for EM9304 on top of btstack_em9304_spi.h platform abstraction only requires hal_em9304_spi.h to be implemented for new ports 82- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 83 84### Changed 85- panu_demo: uses btstack_network.h now 86- WICED: configure printf to replace Linefeed with CRLF 87- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 88 89### Fixed 90- RFCOMM: support connection requests during connection failure 91- L2CAP: support connection requests during connection failure 92- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 93- HCI: avoid double free during halting 94- SM: fixed reconnect using legacy pairing in slave role 95 96 97