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