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### Fixed 10- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 11 12## Changes June 2018 13 14### Added 15- btstack_audio.h: application level API for audio playback and recording 16- embedded/hal_audio.h: low-level API for audio playback and recording 17- HID Device: hid_device_connect(..) function 18- ESP32: implement hal_audio 19- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 20- Rasperry Pi 3 + Raspberry Pi Zero W port in port/raspi 21 22### Changed 23- Errata 10734: 24 - SM: Generate new EC Public Keypair after each pairing 25 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 26- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 27- windows: ignore virtual Bluetooth adapter provided by VMware 28- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 29 30## Changes June 2018 31 32### Fixed 33- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 34- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 35- AVRCP Controller: fix parsing of now playing info 36 37### Changed 38- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 39 40### Added 41- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 42 43## Changes May 2018 44 45### Added 46- GAP: re-encrypt outgoing connection if bonded 47- ATT Server: wait until re-encryption is complete 48- GATT Client: wait until re-encryption is complete 49- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 50- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 51 52### Changed 53- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 54 55### Fixed 56- SM: Fix LE Secure Connection pairing in Central role 57- le_device_db_tlv: fix seq nr management 58- SM: improve le_device_db lookup and storing of IRK 59- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 60- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 61 62## Changes April 2018 63 64### Added 65- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 66- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 67- Embedded: support btstack_stdin via SEGGER RTT 68 69### Changed 70- att_db_util: added security requirement arguments to characteristic creators 71- SM: use btstack_crypto for cryptographpic functions 72- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 73 74### Fixed 75- HFP: fix answer call command 76- HCI: fix buffer overrun in gap_inquiry_explode 77- SDP: free service record item on sdp_unregister_service 78 79## Changes March 2018 80 81### Added 82- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 83- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 84- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 85 86### Fixed 87- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 88- HSP HS: accept incomming SCO connection 89- SM: fix iteration over LE Device DB entries for bonding and address resolving 90- SM: store pairing information only if both devices have requested bonding 91 92## Changes February 2018 93 94### Added 95- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 96- SM: new event SM_EVENT_PAIRING_COMPLETE 97- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 98- GAP: add gap_delete_all_link_keys 99 100### Changed 101- GATT Client: round robin for multiple connections 102- ATT Dispatch: round robin for ATT Server & GATT Client 103- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 104- btstack_link_key_db: addition functions for link key iteration 105- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 106- CSR: set all keys in psram instead of default 107 108### Fixed 109- tc3556x: fix startup after baud rate change 110 111 112## Changes January 2018 113 114### Added 115- Port for Windows with Zephyr HCI Firmware connected via serial port 116- em9304: upload patch containers during HCI bootup 117- Makefile for STM32-F4Discovery port 118- support for console out via SEGGER RTT 119- LE Data Channels example in BTstack and [https://github.com/bluekitchen/CBL2CAPChannel-Demo](iOS example on GitHub) 120- LE Streamer Client can send as fast as possbile as well 121- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 122 123### Changed 124- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 125- GAP: gap_set_connection_parameters includes scan interval and window params 126- GATT Client: GATT_EVENT_MTU indicates max MTU 127- ATT DB Util: attribute handle is returned for new Services and Characteristics 128 129### Fixed 130- Windows: retry serial port operations if not all bytes have been read/written 131- HFP: avoid buffer overflows setting up messages 132- SBC Decoder: improved error handling for invalid SBC audio data 133- GAP: fix Connection Parameter Response in Central role 134- ATT DB Util: update pointer to database in case of realloc 135- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 136- GAP: release HCI Connnection after gap_le_conne 137- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 138 139 140## Changes December 2017 141 142### Added 143- Introduced btstack_network.h network interface abstraction 144- btstack_network_posix implementation using Linux tun/tap interface 145- WICED: support for btstack_stdin (HAVE_STDIN) 146- 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. 147- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 148- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 149- LE Device DB TLV: overwrite oldest entry if no free entries available 150- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 151- Example/hid_host_demo with HID parser and support for basic US keyboard layout 152- 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 153- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 154 155### Changed 156- panu_demo: uses btstack_network.h now 157- WICED: configure printf to replace Linefeed with CRLF 158- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 159 160### Fixed 161- RFCOMM: support connection requests during connection failure 162- L2CAP: support connection requests during connection failure 163- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 164- HCI: avoid double free during halting 165- SM: fixed reconnect using legacy pairing in slave role 166 167 168