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--- 8 9## Unreleased 10 11## Added 12- HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 13- GAP: support additional LE PHYs for scanning and outgoing connections 14- GATT Client: support GATT over BR/EDR via gatt_client_classic_connect 15- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 16- AVRCP: support Cover Art via avrcp_cover_art_client 17- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 18- gatt_client: queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 19- esp32: warn about unsuitable sdkconfig 20- esp32: add BTstack component config options via menuconfig 21- esp32: allow to disable default audio i2s driver via component config 22- esp32: support esp-idf v5.x audio driver 23- esp32: btstack_stdio_init configures buffered output, required for stdin support 24- nxp: support for bootloader version v1, e.g. NXP 88W8997 25- Port for Renesas RA6M4 with DA14531 26- Port for NXP Controller on POSIX (posix-h4-nxp) 27- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 28 29## Removed 30- AVDTP Source: avdtp_source_stream_send_media_payload, use avdtp_source_stream_send_media_payload_rtp instead 31- A2DP Source: a2dp_source_stream_send_media_payload, use a2dp_source_stream_send_media_payload_rtp instead 32 33## Fixed 34- HCI: fix set extended scan response 35- HCI: fix report of extended advertisements with data len > 31 36- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 37- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 38- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 39- gatt_client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 40- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 41- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 42- AVRCP: re-register for notification 43- HFP: fix setup/accept of synchronous connection 44- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 45- esp32: fix power amplifier control on Lyra T v4.3 46 47## Changed 48- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 49- GAP: use stack defaults for LE Connection Parameter Updates 50- GAP: set minimum and maximum CE length to 0 51- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 52- bluetooth: indicated identity address in resolved address type names 53- chipset/bcm: look for PatchRAM file DEVICE_NAME...hcd 54- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 55- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 56- esp32: drop support for Makefile projects from esp-idf 3.x 57- esp32: replace deprecated btstack_run_loop_freertos API calls 58- sco_demo_util: replace hfp_msbc by hfp_codec 59 60 61## Release v1.5.5 62 63### Added 64- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 65- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 66- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 67 68### Fixed 69- GAP: reload LE Resolving List after power-cycle 70- GAP: fix setting of LE Scan Response for data that needs to be fragmented 71- SM: fix pairing process with active ATT communication 72- ESP32: fix init for BR/EDR Only mode 73- ESP32: fix audio driver for sink + source mode 74- ESP32: fixes for ESP-IDF v5.x 75- ESP32: fix compile of non-BTstack examples after adding components/btstack 76 77### Changed 78- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 79- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 80- Mesh: move GATT Services into src/mesh/gatt-service 81- LE Audio: move GATT Services into src/le-audio/gatt-service 82- libusb: improve implementation 83 84## Known Issues 85- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 86 87 88## Release v1.5.4 89 90### Added 91- HFP HF: send custom AT command with hfp_hf_send_at_command 92- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 93- HFP HF: provide Call Waiting information alpha field 94- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 95- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 96- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 97- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 98- GAP: support BIG with gap_big_create and gap_big_terminate 99- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 100- GAP: support Periodic Advertisement Sync Transfer 101- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 102- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 103- Support for ESP32-C3 and ESP32-S3 104 105### Fixed 106- HCI: only add paired LE devices with IRK to resolving list 107- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 108- GAP: use static random address after power up 109- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 110- SM: avoid potential loop during CTKD 111 112### Changed 113- HCI Dump: provide log level to log_message implementation 114- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 115 116 117## Release v1.5.3 118 119### Added 120- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 121- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 122- HFP HF: provide Calling Line Identification alpha field 123- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 124- GOEP Server 125- Chipset: support for firmware download and configuration of Realtek Controllers 126 127### Fixed 128- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 129- GAP: fix race condition that causes duplicate authenticate request 130- SM: address update for non-resolvable private addresses 131- SM: reset state on power off transition 132- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 133- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 134- HFP: try next link setting for SCO connection failure after SCO reject errors 135- HFP AG: activate all AG indicators upon service level connection establishment 136- HFP AG: handle call termination in alerting call state 137- HFP HF: fix parsing of phone number for voice tag 138- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 139 140### Changed 141- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 142- SM: pairing events indicate if LE Secure Connection will be used 143- A2DP: new a2dp.c contains shared code of Sink and Source roles 144- A2DP Sink: automatically configure stream endpoint for outgoing connections 145- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 146- libusb: command line options to delete TLV and specify log file path 147- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 148 149## Release v1.5.2 150 151### Added 152- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 153- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 154- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 155- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 156- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 157- GATT Service: Audio Input Control Service Server (AICS 1.0) 158- GATT Service: Microphone Control Service Server (MCS 1.0) 159- GATT Service: Volume Control Service Server (VCS 1.0) 160- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 161 162### Fixed 163- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 164- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 165- GAP: disable scanning, advertising, connection before updating random address 166- GAP: fix LE Scan with whitelist 167- HFP_AG: fix tracking for call dropped during outgoing ringing 168- HFP: Free HFP Connection object on SDP error / Service not found 169- PBAP Client: emit operation complete with status OBEX_ABORTED 170 171### Changed 172- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 173- GAP: set min encryption key size during init, if supported 174- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 175- ATT Server: use uint8_t for status returns 176- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 177 178 179## Release v1.5.1 180 181### Added 182- GOEP Client: add goep_client_version_20_or_higher 183- ESP32: implement audio source 184 185### Fixed 186- PBAP Client: support disconnect while operation is ongoing 187- PBAP Client: use SRM only if GOEP v2.0 or higher connection 188- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 189- L2CAP: limit remote MTU by local tx configuration in ERTM 190 191### Changed 192- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 193- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 194- ESP32: use I2S configuration from ESP32 LyraT V4.3 195 196 197## Release v1.5.0 198 199### Added 200- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 201- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 202- HCI: hci_remove_event_handler to remove packet handler 203- hci_cmd: support variable length fields and arrayed parameters 204- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 205- GAP: gap_set_page_timeout to set Page Timeout 206- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 207- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 208- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 209- A2DP: allow to register media codec validator for sink and source with: 210 - `a2dp_sink_register_media_config_validator` 211 - `a2dp_source_register_media_config_validator` 212- A2DP Sink: allow accept or reject of stream start on A2DP_SUBEVENT_START_STREAM_REQUESTED when ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION is defined 213- OBEX: new obex_parser for chunked OBEX data 214- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 215- SM: sm_remove_event_handler to remove packet handler 216- GATT Service: Bond Management Service (BMS 1.0) Server 217- GATT Service: Microphone Control Service (MICS 1.0) Server 218- GATT Service: TX Power Service (TPS 1.0) Server 219- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 220- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 221 222### Fixed 223- A2DP Source: fix reconfigure 224- AVRCP Controller: prevent registering of notifications for unsupported events 225- RFCOMM: fixed handling of remote port configuration command 226- HFP AG: fix accept incoming connection while audio connection is established 227- PBAP Client: handle chunked vCard Listing 228- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 229- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 230- SM: support storing bonding information for devices with identical IRK but different public addresses 231- GAP: restart advertising when private address changes 232- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 233 234### Changed 235- Drop iOS support 236- HCI: provide status instead of undocumented int error code and bool for API functions 237- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 238- GAP: local name, EIR data, class of device and default link policy can be updated at any time 239- L2CAP: provide status instead of undocumented int error code and bool for API functions 240- L2CAP: remote features not required for SDP connections 241- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 242- L2CAP: drop reason parameter in l2cap_disconnect 243- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 244- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 245- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 246- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 247- RFCOMM: provide status instead of undocumented int error code and bool for API functions 248- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 249- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 250- HFP: API functions return status code if appropriate 251- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 252- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 253- HFP: separate events for activation (HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED) and deactivation (HFP_SUBEVENT_VOICE_RECOGNITION_DEACTIVATED) instead of combined HFP_SUBEVENT_VOICE_RECOGNITION_STATUS with status field. HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED contains field "enhanced" to indicate if enhanced mode is used. 254- HFP: enhanced VRA: HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED is emitted after VRA is ready and the the audio connection is established. This simplifies HFP HF client logic, i.e. client can call `hfp_hf_enhanced_voice_recognition_report_ready_for_audio directly` upon reception of HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED event. 255- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 256- AVRCP: use PANEL as default unit + subunit info 257- AVRCP Controller: automatically query supported events when registering for notifications 258- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 259- Run Loop: new functionality for HCI transport drivers and inter-process communication: 260 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 261 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 262 - *btstack_run_loop_trigger_exit*: trigger run loop exit 263- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 264- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 265 266 267## Release v1.4.1 268 269### Added 270- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 271 272### Fixed 273- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 274- GAP: avoid requesting authentication twice 275- GAP: cache own address on start advertising and connecting, provide getters 276- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 277- SM: fix race condition between local address changes and pairing procedure 278- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 279 280### Changed 281- HCI: update advertising data without stopping advertising first 282- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 283- GAP: return status for `gap_set_security_mode` 284- GAP: abort legacy pairing if Level 4 is required 285- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 286- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 287- GAP: validate minimal service security level can be reached during pairing in responder role 288- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 289- CVE-2020-26555: reject connections to and from devices with same BD ADDR 290- CVE-2020-26555: ignore NULL link key 291- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 292 293## Release v1.4 294 295### Added 296- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 297- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 298- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 299 - support sending and receiving SLIP frames for HCI H5 300 - support odd parity 301 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 302- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 303- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 304- GATT Client: Battery Service Client 305- GATT Client: Device Information Service Client 306- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 307- GATT Client: Scan Parameters Service Client 308- GATT Server: Scan Parameters Service Server 309- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 310- GAP: support sniff subrating with `gap_sniff_subrating_configure` 311- GAP: support QoS setup with `gap_qos_set` 312- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 313- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 314- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 315- AVRCP Controller: reassemble fragmented AVCTP packets 316- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 317- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 318 319### Fixed 320- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 321- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 322- GAP: allow to disable link supervision timeout 323- GAP: fix `gap_connect` after `gap_connect_cancel` 324- GAP: re-configure advertisements after power cycle 325- HCI: handle start inquiry failure 326- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 327- L2CAP: return unknown mandatory option in config response 328- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 329- AVRCP Target: fix notification changed event 330- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 331- HFP HF: fix audio connection setup if codec negotiation is supported 332- HFP HF: only emit single event for RING and AG Status updates 333- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 334 335### Changed 336- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 337 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 338 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 339 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 340 - iOS: not supported 341- Run Loop Base: functionality used in most platform run loop implementations 342 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 343 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 344- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 345 - `posix/hci_dump_posix_fs` - writes binary log file 346 - `posix/hci_dump_stdout` - log to console using printf with local system time 347 - `embedded/hci_dump_embedded_stdout` - log to console using printf 348 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 349 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 350- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 351- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 352- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 353- POSIX Ports: use new `btstack_uart_posix` implementation 354- posix-h5/posix-h5-bcm: use even parity for UART 355- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 356- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 357- GAP: only store link key if it allows requested security level 358- GAP: abort SSP pairing if MITM protection required but not possible 359- SM: start pairing as Central for already encrypted connection on Slave Security Request 360- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 361- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 362- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 363 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 364- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 365 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 366- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 367- HFP: provide acl_handle in events to identify connection 368- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 369- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 370 371 372## Release v1.3.2 373 374### Added 375- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 376- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 377- HID Host: add profile, update `hid_host_demo.c` example 378 379### Fixed 380- L2CAP: make handling of HCI disconnect more robust 381- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 382- AVRCP: fix issue when Controller and Target send at the same time 383 384### Changed 385- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 386 387 388## Release v1.3 389 390### Added 391- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 392- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 393- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 394- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 395- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 396- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 397- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 398- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 399- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 400 401### Fixed 402- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 403- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 404- HFP AG/HSP AG: avoid connecting to remote service with same role 405- A2DP Source: support multiple Stream Endpoints with different Media Codec types 406- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 407- GATT Compiler: support multiple instances of the same service 408 409### Changed 410- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 411- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 412- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 413- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 414- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 415- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 416- Ports: STM32-F103RB Nucleo + CC256x port removed 417- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 418 419 420## Release v1.2.1 421 422### Fixed 423- L2CAP: use connection handle for channel lookups 424- L2CAP: forward data only in open state 425 426### Changed 427- L2CAP: check packet size against local mtu for classic basic channels 428 429 430## Release v1.2 431 432### Fixed 433- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 434- SM: fix update of sc flag for re-encrypted connection in peripheral role 435- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 436- ESP32: fix audio sink driver 437 438### Added 439- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 440- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 441- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 442- SM: emit events for re-encryption started/complete when bonding information is available 443 444### Changed 445- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 446- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 447 448 449## Changes October 2020 450 451### Fixed 452- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 453- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 454- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 455- SM: set LinkKey flag to request CTKD if enabled 456- SM: store CTKD key with Public Identity Address 457- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 458- SM: start SMP Timeout when sending Security Request 459- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 460- HCI: fix reject of LE remote connection param request via HCI 461 462### Added 463- GAP: add `gap_get_link_key_for_bd_addr` 464- GAP: add `gap_bonded` to check if bonding information is available for active connection 465- SM: support h7 for CTKD 466 467### Changed 468- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 469- SM: block connection if encryption fails for bonded devices as Central 470- SM: support pairing as Central after failed re-encryption 471 472 473## Release v1.1 474 475### Fixed 476- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 477 478### Added 479 480### Changed 481 482 483## Changes September 2020 484 485### Fixed 486- HFP: fix parsing of ranges e.g. in +CIND responses 487- AVDTP, AVRCP: fix bugs due to transaction id overrun 488- A2DP Source: fix issues with stream configuration by sink 489- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 490 491### Added 492- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 493- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 494 495### Changed 496- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 497- HSP, HFP: allow to configure usable SCO packet types 498- cc256x: update CC256xC init script to v1.4 499- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 500 501## Changes August 2020 502 503### Fixed 504- ESP32: fix authentication for incoming Secure Connections 505- AVDTP: Fix forwarding of Delay reports 506- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 507- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 508 509### Added 510- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 511- GAP: request role change for classic connection via `gap_request_role` 512- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 513- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 514- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 515- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 516- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 517- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 518 519### Changed 520- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 521- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 522- example/hid_host_demo: try to become master for incoming connections 523- btstack_run_loop: use btstack_assert instead of local while(true) 524- att_db_util: allow to reset att_db via `att_db_util_init` 525 526## Changes July 2020 527 528### Fixed 529- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 530- AVDTP: handle concurrent signaling establishment with reject and retry 531 532### Added 533- example/hid_host_demo: support reconnect from HID device 534- Crypto: support software AES128 for AES-CCM operations 535- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 536- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 537- AVDTP: renamed definition of supported features from AVDTP_SOURCE_SF_ and AVDTP_SINK_SF_ to AVDTP_SOURCE_FEATURE_MASK_ and AVDTP_SINK_FEATURE_MASK_ respectively 538- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 539- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 540 541### Changed 542- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 543 544 545## Changes June 2020 546 547### Fixed 548- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 549- SM: Fix validation of confirm value for secure connection Passkey entry 550- AVRCP: handle concurrent signaling establishment with reject and retry 551 552### Added 553- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 554- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 555- Windows port for Dialog DA14585 connected via serial port 556 557## Changes 558- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 559 560## Changes May 2020 561 562### Fixed 563- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 564- pbap_client: fix PBAP UUID len on connect message 565- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 566- A2DP Source: only connect to remote sink stream endpoints 567- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 568- hsp_hs: fix disconnect if audio not connected 569- hsp_ag: fix accept incoming connection 570 571### Added 572- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 573- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 574- cc256x: allow to specify power vector for each modulation type 575- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 576- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 577- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 578 579### Changed 580- L2CAP ERTM: send extended features request only once per HCI connection 581 582 583## Changes April 2020 584 585### Fixed 586- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 587- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 588 589### Added 590- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 591- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 592- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 593 594### Changed 595- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 596- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 597- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 598 599 600## Changes March 2020 601 602### Fixed 603- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 604- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 605 606### Added 607- GATT Client: allow to register for any notification/indication and/or any connection 608- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 609- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 610- btstack_util: added btstack_replace_bd_addr_placeholder 611 612### Changed 613- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 614- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 615 616 617## Changes Februar 2020 618 619### Fixed 620- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 621- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 622 623### Changed 624- hid_host_mode: allow sniff mode 625 626### Added 627- port/qt-usb and port/qt-h4: integrate BTstack Qt run loop for Unix- and Win32-based Qt application connected to Bluetooth module via H4 over serial port or USB 628 629 630## Changes January 2020 631 632### Fixed 633- L2CAP ERTM: avoid read-after-free on decline of incoming connection 634- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 635- att_db_util: fix realloc of att db buffer for large attributes 636- btstack_tlv_posix: only keep last value in memory, fix delete operation 637- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 638 639### Added 640- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 641- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 642- ATT Server: validate request pdu length 643 644### Changed 645- Crypto: update AES-CMAC implementation to access all message bytes sequentially 646 647 648## Changes December 2019 649 650### Fixed 651- example/pan_lwip_http_server: use Network Access Point, CoD 652- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 653 654### Added 655 656### Changed 657- Updated CC256x initscript: CC256xC v1.3 658- ESP32: add CMake project files 659 660 661## Changes November 2019 662 663### Fixed 664- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 665- L2CAP: send LE Data Channel SDUs round robin with other data 666- L2CAP ERTM: send ERTM I-frames round robin with other data 667 668### Added 669- ATT Server: return error if request to send now for Notification or Indication already registered 670- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 671- btstack_run_loop_remove: return bool true if timer/data source was removed 672- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 673- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 674- lwip: add download test files to http server demo 675 676### Changed 677- Linked List: return bool true if item was removed 678 679 680## Changes October 2019 681 682### Fixed 683 684### Added 685- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 686- provide `btstack_assert(condition)` 687- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 688 689### Changed 690- libusb and posix ports: store bonding information in TLV 691 692 693## Changes September 2019 694 695### Fixed 696- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 697- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 698- GATT Client: allow Write Without Response independent of other requests 699 700### Added 701- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 702- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 703 704### Changed 705- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 706- bluetooth.h: extract internal defintitions to respective protocol layers 707- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 708 709 710## Changes August 2019 711 712### Fixed 713- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 714- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 715- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 716- L2CAP ERTM: stop timers on disconnect 717- L2CAP ERTM: fix sending of segmented SDUs 718- L2CAP ERTM: handle unsupported Information Response 719- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 720 721### Added 722- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 723 724## Changed 725- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 726- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 727- POSIX: use monotonic clock as timebase if available 728- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 729- HCI: Read Encryption Key Size after encryption was enabled 730- Errata 11838: 731 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 732 - GAP: validate encryption key size to emit GAP Security Levels 733 734## Changes July 2019 735 736### Fixed 737- SM: Fixed regression introduced in f3582630 738- L2CAP: avoid reading l2cap signaling command len out of bounds 739- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 740 741### Changed 742- SM: Start encryption upon receiving slave securiy request if bonded 743- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 744 745--- 746 747## Changes June 2019 748 749### Changed 750- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 751- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 752- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate suppport for GATT over BR/EDR 753 754### Fixed 755- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 756- libusb: avoid use-after-free for SCO packets on disconnect 757 758### Added 759- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 760- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 761- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 762 763--- 764 765## Changes May 2019 766 767### Changed 768- ESP32: Configure SCO over HCI after power up 769- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 770 is defined, an explicit delete field is used to indicate an invalid entry. 771 772### Fixed 773- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 774 775### Added 776- gatt_client: emit query complete event for signed write operation 777- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 778 779--- 780 781## Changes April 2019 782 783### Changed 784- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 785 786### Fixed 787- hci: pad LE Scan response with zeroes 788- SM: store local CSRK 789- ATT DB: call write callback for validated signed writes 790- ATT Server: abort signed write validation on incoming new request 791- Bluetooth SIG web scraping tools updated 792- libusb: compiles for FreeBSD 793 794### Added 795 796--- 797 798## Changes March 2019 799 800### Changed 801- use Makefile for stm32-f4discovery-cc256x port 802- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 803 804### Fixed 805- SM: Use provided authentication requirements in slave security request 806 807### Added 808- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 809- SM: Track if connection encryption is based on LE Secure Connection pairing 810- ATT DB: Validate if connection encrypted is based on SC if requested 811- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 812- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 813- ESP32: erase nvs flash is newer nvs version found 814- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 815- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 816 817## Changes February 2019 818 819### Changed 820- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 821- btstack_audio: split interface into sink and source 822 823### Fixed 824- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 825- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 826 827### Added 828- example/a2dp_sink_demo: add target role, support volume control on both devices 829- example/audio_duplex: playback audio audio source on audio sink (test audio path) 830- btstack_audio_embedded: implement audio source path 831 832--- 833 834## Changes January 2019 835 836### Changed 837- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 838- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 839 840### Added 841- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 842- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 843- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 844- ad_parser: validate data element length fields in ad_iterator_has_more 845- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 846 847### Fixed 848- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 849- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 850- Crypto: directly process queued crypto operation on HCI result 851 852--- 853 854## Changes December 2018 855 856### Added 857- SM: generate and store ER / IR keys in TLV, unless manually set by application 858- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 859 860### Fixed 861- SM: fix internal buffer overrun during random address generation 862 863## Changes November 2018 864 865### Added 866- GAP: gap_le_connection_interval provides connection interval for conn handle 867- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 868- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 869- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 870- SM: generate and store ER / IR keys in TLV, unless manually set by application 871 872### Fixed 873- SM: prevent random address updates if gap_random_address_set was used 874- SM: fix internal buffer overrun that can cause storing of bonding information to fail 875- SM: ignore Slave Security Request after sending own Pairing Request 876- L2CAP: fix use after free on disconnect if ERTM is enabled 877- HFP: Handle multiple commands/responses in single RFCOMM packet 878- Memory Pools: clear all buffers before use 879 880--- 881 882## Changes October 2018 883 884### Added 885- SDP Server: queue incoming connections when already connected instead of rejecting them 886- GAP: Support enter/exit sniff mode via gap_sniff_mode_enter/exit. gap_set_default_link_policy_settings is needed to enable sniff mode in general. 887- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 888 889### Fixed 890- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 891- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 892- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 893- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 894- L2CAP ERTM: fix outgoing fragment management 895- HFP: decline incoming RFCOMM connection after outgoing connection was started 896- AVRCP: fix crash on disconnect of connection established by remote 897 898--- 899 900## Changes September 2018 901 902### Fixed 903- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 904- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 905- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 906- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 907- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 908- RFCOMM: Trigger l2cap request to send on rfcomm credits when client is waiting to sendtrigger l2cap request to send on rfcomm credits when client is waiting to send 909- RFCOMM: Avoid use-after-free on channel finalize 910- GATT Client: stop timer on disconnect - fixes use after free / crash 911 912### Added 913- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 914- 3rd-party: yxml is used for PBAP vCard list parsing 915- cc256xC: new v1.1 init scripts 916 917--- 918 919## Changes August 2018 920 921### Added 922- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 923 924### Fixed 925- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 926- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 927- SM: drop LTK flag from Pairing Response for Secure Connections 928- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 929 930## Changes June 2018 931 932### Added 933- btstack_audio.h: application level API for audio playback and recording 934- embedded/hal_audio.h: low-level API for audio playback and recording 935- HID Device: hid_device_connect(..) function 936- ESP32: implement hal_audio 937- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 938- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 939 940### Changed 941- Errata 10734: 942 - SM: Generate new EC Public Keypair after each pairing 943 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 944- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 945- windows: ignore virtual Bluetooth adapter provided by VMware 946- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 947 948--- 949 950## Changes June 2018 951 952### Fixed 953- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 954- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 955- AVRCP Controller: fix parsing of now playing info 956 957### Changed 958- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 959 960### Added 961- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 962 963--- 964 965## Changes May 2018 966 967### Added 968- GAP: re-encrypt outgoing connection if bonded 969- ATT Server: wait until re-encryption is complete 970- GATT Client: wait until re-encryption is complete 971- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 972- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 973 974### Changed 975- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 976 977### Fixed 978- SM: Fix LE Secure Connection pairing in Central role 979- le_device_db_tlv: fix seq nr management 980- SM: improve le_device_db lookup and storing of IRK 981- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 982- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 983 984--- 985 986## Changes April 2018 987 988### Added 989- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 990- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 991- Embedded: support btstack_stdin via SEGGER RTT 992 993### Changed 994- att_db_util: added security requirement arguments to characteristic creators 995- SM: use btstack_crypto for cryptographpic functions 996- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 997 998### Fixed 999- HFP: fix answer call command 1000- HCI: fix buffer overrun in gap_inquiry_explode 1001- SDP: free service record item on sdp_unregister_service 1002 1003## Changes March 2018 1004 1005### Added 1006- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1007- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1008- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1009 1010### Fixed 1011- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1012- HSP HS: accept incomming SCO connection 1013- SM: fix iteration over LE Device DB entries for bonding and address resolving 1014- SM: store pairing information only if both devices have requested bonding 1015 1016--- 1017 1018## Changes February 2018 1019 1020### Added 1021- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1022- SM: new event SM_EVENT_PAIRING_COMPLETE 1023- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1024- GAP: add gap_delete_all_link_keys 1025 1026### Changed 1027- GATT Client: round robin for multiple connections 1028- ATT Dispatch: round robin for ATT Server & GATT Client 1029- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1030- btstack_link_key_db: addition functions for link key iteration 1031- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1032- CSR: set all keys in psram instead of default 1033 1034### Fixed 1035- tc3556x: fix startup after baud rate change 1036 1037--- 1038 1039## Changes January 2018 1040 1041### Added 1042- Port for Windows with Zephyr HCI Firmware connected via serial port 1043- em9304: upload patch containers during HCI bootup 1044- Makefile for STM32-F4Discovery port 1045- support for console out via SEGGER RTT 1046- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1047- LE Streamer Client can send as fast as possbile as well 1048- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1049 1050### Changed 1051- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1052- GAP: gap_set_connection_parameters includes scan interval and window params 1053- GATT Client: GATT_EVENT_MTU indicates max MTU 1054- ATT DB Util: attribute handle is returned for new Services and Characteristics 1055 1056### Fixed 1057- Windows: retry serial port operations if not all bytes have been read/written 1058- HFP: avoid buffer overflows setting up messages 1059- SBC Decoder: improved error handling for invalid SBC audio data 1060- GAP: fix Connection Parameter Response in Central role 1061- ATT DB Util: update pointer to database in case of realloc 1062- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1063- GAP: release HCI Connnection after gap_le_conne 1064- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1065 1066--- 1067 1068## Changes December 2017 1069 1070### Added 1071- Introduced btstack_network.h network interface abstraction 1072- btstack_network_posix implementation using Linux tun/tap interface 1073- WICED: support for btstack_stdin (HAVE_STDIN) 1074- 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. 1075- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1076- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1077- LE Device DB TLV: overwrite oldest entry if no free entries available 1078- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1079- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1080- 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 1081- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1082 1083### Changed 1084- panu_demo: uses btstack_network.h now 1085- WICED: configure printf to replace Linefeed with CRLF 1086- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1087 1088### Fixed 1089- RFCOMM: support connection requests during connection failure 1090- L2CAP: support connection requests during connection failure 1091- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1092- HCI: avoid double free during halting 1093- SM: fixed reconnect using legacy pairing in slave role 1094 1095 1096