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- GATT Client: support GATT over Enhanced LE Bearer 13- GATT Server: support GATT over Enhanced LE Bearer 14- LE Device DB: le_device_db_dump dumps LTK 15- Port for Zephyr 3.x 16 17### Fixed 18- HCI: fix remove le device from whitelist 19- HFP: use 'don't care' to accept SCO connections, fixes issue on ESP32 20- HFP: fix LC3-WB init 21 22### Changed 23- btstack_crypto: allow MBEDTLS config via MBEDTLS_CONFIG_FILE 24- remove old Zephyr 1.9 port 25 26## Release v1.5.6 27 28### Added 29- HCI: HCI_ACL_CHUNK_SIZE_ALIGNMENT allows to keep HCI transport writes aligned 30- GAP: support additional LE PHYs for scanning and outgoing connections 31- GATT Client: allow to queue requests with gatt_client_request_to_send_gatt_query and gatt_client_request_to_write_without_response 32- GATT Client: support GATT over BR/EDR transport via gatt_client_classic_connect 33- HFP: provide SCO packet types and rx/tx packet lengths in HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED 34- HFP: allow to register custom at commands with hfp_hf_register_custom_at_command 35- HFP: experimental support for LC3-SWB from HFP SWB draft with ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 36- AVRCP: support Cover Art via avrcp_cover_art_client 37- example: gatt_streamer_server and le_streamer_client report DLE and PHY changes 38- NXP: support for NXP Controller with bootloader versions v1, e.g. NXP 88W8997, and v3, e.g. NXP IW416 or IW61x 39- esp32: support esp-idf v5.x audio driver 40- esp32: warn about sdkconfig issues 41- esp32: add BTstack component config options via menuconfig 42- esp32: allow to disable default audio i2s driver via component config 43- esp32: btstack_stdio_init configures buffered output, required for stdin support 44- Port for Renesas RA6M4 with DA14531 45- Port for NXP Controller on POSIX (posix-h4-nxp) 46- Port for newer Infineon Controller on POSIX (posix-h4-bcm) that requires autobaud-mode 47 48### Fixed 49- HCI: fix set extended scan response 50- HCI: fix report of extended advertisements with data len > 31 51- HCI: fix CTKD in Initiator role over BR/EDR SC when using dedicated bonding 52- SM: fix value in SM_EVENT_NUMERIC_COMPARISON_REQUEST 53- SM: ignore Security Request during re-encryption 54- GATT Client: return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER for invalid connection handle 55- A2DP: emit A2DP_SUBEVENT_STREAM_ESTABLISHED with if connection fails, e.g. because of Page Timeout 56- A2DP Source: a2dp_source_stream_send_media_payload was removed, use a2dp_source_stream_send_media_payload_rtp instead 57- A2DP: use samples as timestamp, fixes issue with Apple Airpods Pro 2nd Gen 58- AVDTP Source: avdtp_source_stream_send_media_payload was removed, use avdtp_source_stream_send_media_payload_rtp instead 59- AVRCP: re-register for notification 60- HFP: fix setup/accept of synchronous connection 61- HFP: use mandatory safe settings considering BR/EDR Secure Connections to accept synchronous connections 62- HFP: avoid SCO packet types not supported either locally or remotely 63- HFP: remove trailing newline/carriage return in custom command event 64- PBAP Client: make pbap_set_property_selector work for Pull Phonebook 65- btstack_stdin_embedded: use timer to poll RTT input, fix for tickless RTOS 66- esp32: fix audio power amplifier control on Lyra T v4.3 board 67- tool/convert_gatt_service: removed as GATT Service descriptions not available on Bluetooth SIG web site 68 69### Changed 70- GAP: add gap_set_peer_privacy_mode with default LE_PRIVACY_MODE_DEVICE 71- GAP: use stack defaults for LE Connection Parameter Updates 72- GAP: set minimum and maximum CE length to 0 73- GAP: ENABLE_EXPLICIT_DEDICATED_BONDING_DISCONNECT disables disconnect after dedicated bonding 74- GOEP Client: support multiple instances 75- A2DP Sink: drop unused local seid argument in a2dp_sink_establish_stream 76- HFP: emit HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT after sending custom command / unsolicited response code 77- sco_demo_util: replace hfp_msbc by hfp_codec 78- BCM: look for PatchRAM file with prefix DEVICE_NAME and extension '.hcd' 79- bluetooth: indicated identity address in resolved address type enums name 80- btstack_audio: added get_samplerate function to help with audio sample rate synchronization 81- btstack_flash_bank: write empty tag instead of overwriting existing tag with ENABLE_TLV_FLASH_WRITE_ONCE 82- esp32: drop support for Makefile projects from esp-idf 3.x 83- esp32: avoid deprecated btstack_run_loop_freertos API calls 84- esp32: use sample rate compensation in a2dp_sink_demo 85- stm32-f4discovery-cc256x: use external oscillator for better I2S clock 86- stm32-f4discovery: use sample rate compensation in a2dp_sink_demo 87 88 89## Release v1.5.5 90 91### Added 92- hci_dump_stdout: allow to truncate ACL, SCO and ISO packets with HCI_DUMP_STDOUT_MAX_SIZE_* 93- GATT Service: Broadcast Audio Scan Service Server and Client (BASS 1.0) 94- example/a2dp_source_demo: add command to scan and connect to Bluetooth speaker by class of device 95 96### Fixed 97- GAP: reload LE Resolving List after power-cycle 98- GAP: fix setting of LE Scan Response for data that needs to be fragmented 99- SM: fix pairing process with active ATT communication 100- ESP32: fix init for BR/EDR Only mode 101- ESP32: fix audio driver for sink + source mode 102- ESP32: fixes for ESP-IDF v5.x 103- ESP32: fix compile of non-BTstack examples after adding components/btstack 104 105### Changed 106- GAP: reload LE Filterlist and Periodic Advertiser List after power-cycle 107- SM: delete bonding information for existing device with BD_ADDR on new pairing with different IRK 108- Mesh: move GATT Services into src/mesh/gatt-service 109- LE Audio: move GATT Services into src/le-audio/gatt-service 110- libusb: improve implementation 111 112## Known Issues 113- ESP32: audio driver for ES8388/LyraT v4.3 not updated for esp-idf 5.x 114 115 116## Release v1.5.4 117 118### Added 119- HFP HF: send custom AT command with hfp_hf_send_at_command 120- HFP HF: terminate held calls with hfp_hf_terminate_held_calls 121- HFP HF: provide Call Waiting information alpha field 122- HFP HF: add hfp_hf_set_default_microphone_gain and hfp_hf_set_set_default_speaker_gain for SLC 123- HFP AG: support handling of custom AT commands with hfp_ag_register_custom_at_command 124- HFP AG: send custom unsolicited result code with hfp_ag_send_unsolicited_result_code 125- GAP: allow to enable duplicate filter for LE scanning with gap_set_scan_duplicate_filter 126- GAP: support BIG with gap_big_create and gap_big_terminate 127- GAP: support BIG Sync gap_big_sync_create and gap_big_sync_terminate 128- GAP: support Periodic Advertisement Sync Transfer 129- port: CMake build files in all windows-* ports allow to use Visual Studio 2022 130- embedded audio: mono audio is played on both channels if HAVE_HAL_AUDIO_SINK_STEREO_ONLY is defined 131- Support for ESP32-C3 and ESP32-S3 132 133### Fixed 134- HCI: only add paired LE devices with IRK to resolving list 135- HCI: send HCI LE Create Connection Cancel only once for outgoing LE connections without whitelist 136- GAP: use static random address after power up 137- L2CAP: fix L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 138- SM: avoid potential loop during CTKD 139 140### Changed 141- HCI Dump: provide log level to log_message implementation 142- GAP: replace BTSTACK_EVENT_DISCOVERABLE_ENABLED with BTSTACK_EVENT_SCAN_MODE_CHANGED 143 144 145## Release v1.5.3 146 147### Added 148- GAP: support periodic advertising with ENABLE_LE_PERIODIC_ADVERTISING 149- GAP: support periodic inquiry mode with gap_inquiry_periodic_start 150- HFP HF: provide Calling Line Identification alpha field 151- HFP HF: emit HFP_SUBEVENT_TRANSMIT_DTMF_CODES after sending DTMF command 152- GOEP Server 153- Chipset: support for firmware download and configuration of Realtek Controllers 154 155### Fixed 156- GAP: fix gap_connect_cancel for gap_connect_with_whitelist 157- GAP: fix race condition that causes duplicate authenticate request 158- SM: address update for non-resolvable private addresses 159- SM: reset state on power off transition 160- L2CAP: Fix accept incoming ERTM connection when Information Request already complete 161- A2DP Sink: fix config API for AAC, ATRAC, and other codecs 162- HFP: try next link setting for SCO connection failure after SCO reject errors 163- HFP AG: activate all AG indicators upon service level connection establishment 164- HFP AG: handle call termination in alerting call state 165- HFP HF: fix parsing of phone number for voice tag 166- HFP HF: report HFP_SUBEVENT_NETWORK_OPERATOR_CHANGED event 167 168### Changed 169- HCI: use ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS to rejected classic connections 170- SM: pairing events indicate if LE Secure Connection will be used 171- A2DP: new a2dp.c contains shared code of Sink and Source roles 172- A2DP Sink: automatically configure stream endpoint for outgoing connections 173- HFP AG: drop unused number parameter from hfp_ag_outgoing_call_initiated 174- libusb: command line options to delete TLV and specify log file path 175- Windows: native implementations of btstack_tlv_window, hci_dump_windows_fs, hci_dump_window_stdout 176 177## Release v1.5.2 178 179### Added 180- GAP: ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS serializes Inquiry, Remote Name Request and Create Connection operations 181- GAP: support extended advertising with ENABLE_LE_EXTENDED_ADVERTISING 182- GAP: gap_enable_link_watchdog() uses automatic flush timeout to disconnect if data cannot be sent 183- GAP: gap_secure_connections_active() to query if BR/EDR Secure Connecions are possible 184- ATT DB: provide gatt_server_get_handle_range_for_service_with_uuid16 to find included service within handle range 185- GATT Service: Audio Input Control Service Server (AICS 1.0) 186- GATT Service: Microphone Control Service Server (MCS 1.0) 187- GATT Service: Volume Control Service Server (VCS 1.0) 188- GATT Service: Volume Offset Control Service Server (VOCS 1.0) 189 190### Fixed 191- POSIX: fix RTS/CTS configuration by keeping local termios copy in btstack_uart_posix 192- HCI: fix handling of HCI Connection Complete with error (regression introduced in v1.5.1) 193- GAP: disable scanning, advertising, connection before updating random address 194- GAP: fix LE Scan with whitelist 195- HFP_AG: fix tracking for call dropped during outgoing ringing 196- HFP: Free HFP Connection object on SDP error / Service not found 197- PBAP Client: emit operation complete with status OBEX_ABORTED 198 199### Changed 200- Chipset: use da145xx in folder/file/function names for Dialog Semiconductor SoCs 201- GAP: set min encryption key size during init, if supported 202- AVDTP: use BLUETOOTH_SERVICE_CLASS_AUDIO_SINK / SOURCE instead of BLUETOOTH_PROTOCOL_AVDTP in SDP queries 203- ATT Server: use uint8_t for status returns 204- libusb, POSIX and Windows ports: use '-' instead of ':' in btstack_BD_ADDR.tlv filename 205 206 207## Release v1.5.1 208 209### Added 210- GOEP Client: add goep_client_version_20_or_higher 211- ESP32: implement audio source 212 213### Fixed 214- PBAP Client: support disconnect while operation is ongoing 215- PBAP Client: use SRM only if GOEP v2.0 or higher connection 216- PBAP Client: emit vCard entry data as PBAP_DATA_PACKET 217- L2CAP: limit remote MTU by local tx configuration in ERTM 218 219### Changed 220- Example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation 221- ESP32: update sdkconfig for esp-idf v4.3, disable Bluedroid host stack 222- ESP32: use I2S configuration from ESP32 LyraT V4.3 223 224 225## Release v1.5.0 226 227### Added 228- HCI Dump: Support BTSnoop format in hci_dump_posix_fs.c for format = HCI_DUMP_BTSNOOP 229- HCI Dump RTT STDOUT: drop messages if RTT buffer is full and RTT is configured for non-blocking 230- HCI: hci_remove_event_handler to remove packet handler 231- hci_cmd: support variable length fields and arrayed parameters 232- GAP: ENABLE_EXPLICIT_LINK_KEY_REPLY allows for asynchronous link key lookup by application 233- GAP: gap_set_page_timeout to set Page Timeout 234- GAP: gap_inquiry_set_scan_activity to set Inquiry Scan Activity 235- L2CAP: emit L2CAP_EVENT_INFORMATION_RESPONSE event with extended features and fixed channels supported 236- L2CAP: support Enhanced Credit-based Flow-Control Mode for connection-oriented channels over BR/EDR/LE 237- A2DP: allow to register media codec validator for sink and source with: 238 - `a2dp_sink_register_media_config_validator` 239 - `a2dp_source_register_media_config_validator` 240- 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 241- OBEX: new obex_parser for chunked OBEX data 242- SM: Support Cross-Transport Key-Derivation (CTKD) of LE LTK from BR/EDR SC Link Key in Responder role 243- SM: sm_remove_event_handler to remove packet handler 244- GATT Service: Bond Management Service (BMS 1.0) Server 245- GATT Service: Microphone Control Service (MICS 1.0) Server 246- GATT Service: TX Power Service (TPS 1.0) Server 247- POSIX: btstack_signal allows to register for callback on signal, e.g. ctrl-c 248- Windows: btstack_stdin_window_register_ctrl_c_callback allows to register for ctrl-c 249 250### Fixed 251- A2DP Source: fix reconfigure 252- AVRCP Controller: prevent registering of notifications for unsupported events 253- RFCOMM: fixed handling of remote port configuration command 254- HFP AG: fix accept incoming connection while audio connection is established 255- PBAP Client: handle chunked vCard Listing 256- PBAP Client: use new streaming obex_parser to handle chunked OBEX data 257- SM: Work around for unexpected Windows 10 disconnect for BR Secure Connections (SMP over BR timeout) 258- SM: support storing bonding information for devices with identical IRK but different public addresses 259- GAP: restart advertising when private address changes 260- le_device_db_tlv: keep number of devices reported by le_device_db_count if old entry is replaced 261 262### Changed 263- Drop iOS support 264- HCI: provide status instead of undocumented int error code and bool for API functions 265- HCI: use 1000 ms watchdog to force power off for hci_power_control(HCI_POWER_OFF) 266- GAP: local name, EIR data, class of device and default link policy can be updated at any time 267- L2CAP: provide status instead of undocumented int error code and bool for API functions 268- L2CAP: remote features not required for SDP connections 269- L2CAP: replaced l2cap_register_packet_handler with l2cap_add_event_handler to register multiple handlers 270- L2CAP: drop reason parameter in l2cap_disconnect 271- L2CAP: use official terminology for L2CAP channel modes - ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE replaces ENABLE_LE_DATA_CHANNELS 272- L2CAP: unify API for can send now, request to send, and send packet and disconnect channel 273- L2CAP: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events) 274- RFCOMM: `RFCOMM_EVENT_PORT_CONFIGURATION` contains rfcomm_cid and remote flag, emitted for query config 275- RFCOMM: provide status instead of undocumented int error code and bool for API functions 276- RFCOMM: remote port configuration, line status, and modem status are sent by channel state machine 277- HSP: add ACL Connection to all events and BD ADDR to HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE 278- HFP: API functions return status code if appropriate 279- HFP: removed one parameter from hfp_ag/hf_activate_voice_recognition function, introduce hfp_ag/hf_deactivate_voice_recognition instead 280- HFP: merged legacy and enhanced Voice Recognition Activation (VRA) API. If available enhanced mode will be preferred. 281- 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. 282- 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. 283- AVDTP: media config validator is called with preview of media codec configuration event and configured separately for sink/source 284- AVRCP: use PANEL as default unit + subunit info 285- AVRCP Controller: automatically query supported events when registering for notifications 286- AVRCP Target: cache companies and events in library and remove need to answer query in application callback. Use Bluetooth SIG as default company. 287- Run Loop: new functionality for HCI transport drivers and inter-process communication: 288 - *btstack_run_loop_poll_data_sources_from_irq*: used to transfer control from IRQ handler to main thread/run loop 289 - *btstack_run_loop_execute_on_main_thread*: schedule code execution on main thread from other thread 290 - *btstack_run_loop_trigger_exit*: trigger run loop exit 291- POSIX / Windows / Raspi / Qt: use updated ctrl-c handling 292- POSIX TLV: use max value size of 2048, assert in store function if value size is larger 293 294 295## Release v1.4.1 296 297### Added 298- GAP: emit GAP_EVENT_PAIRING_STARTED and GAP_EVENT_PAIRING_COMPLETE 299 300### Fixed 301- GAP: store link key in hci connection struct to allow authenticate after pairing without bonding 302- GAP: avoid requesting authentication twice 303- GAP: cache own address on start advertising and connecting, provide getters 304- GAP: stop LE connecting if create connection fails (e.g. connectable adv active and multiple roles not supported) 305- SM: fix race condition between local address changes and pairing procedure 306- ATT DB: fix spelling `gatt_server_get_handle_range_for_service_with_uuid128`, `gatt_server_get_handle_range_for_service_with_uuid16` 307 308### Changed 309- HCI: update advertising data without stopping advertising first 310- GAP: Drop local bonding flag in IO Capability Reply if remote does not indicate bonding 311- GAP: return status for `gap_set_security_mode` 312- GAP: abort legacy pairing if Level 4 is required 313- GAP: abort SSP on IO Capabilities Request event if Level 4 is required but SC not supported by remote 314- GAP: abort SSP on User Confirmation Request event if Level 3 is required but MITM protection not possible 315- GAP: validate minimal service security level can be reached during pairing in responder role 316- L2CAP: don't trigger hci disconnect if l2cap security requirements are insufficient 317- CVE-2020-26555: reject connections to and from devices with same BD ADDR 318- CVE-2020-26555: ignore NULL link key 319- CVE-2020-26558: abort LE Secure Connection pairing if remote uses the same public key 320 321## Release v1.4 322 323### Added 324- HCI: `btstack_transport_sco.h` supports SCO over physical PCM/I2S interface (`HAVE_SCO_TRANSPORT`) 325- POSIX: `btstack_transport_sco_i2s_test_bridge.c` implements SCO transport interface for UART-to-I2S test bridge 326- btstack_uart: `btstack_uart_t` interface extends `btstack_uart_block_t`: 327 - support sending and receiving SLIP frames for HCI H5 328 - support odd parity 329 - `hci_transport_h4` and chipset drivers have new functions to provide `btstack_uart_t` 330- btstack_uart_slip_wrapper: wrapper that implements SLIP functionality for existing `btstack_uart_block` drivers. 331- hci_transport: add parity field and pass on to `btstack_uart_t` in h4 and h5 332- GATT Client: Battery Service Client 333- GATT Client: Device Information Service Client 334- GATT Client: HID-over-GATT (HOG) Client, Report and Boot Host 335- GATT Client: Scan Parameters Service Client 336- GATT Server: Scan Parameters Service Server 337- GAP: support scan page configuration with `gap_set_page_scan_activity` and `gap_set_page_scan_type` 338- GAP: support sniff subrating with `gap_sniff_subrating_configure` 339- GAP: support QoS setup with `gap_qos_set` 340- AVRCP: new field `button_pressed` in `AVRCP_SUBEVENT_OPERATION` 341- AVRCP: `AVRCP_SUBEVENT_OPERATION` emitted for button release 342- AVRCP Controller: `avrcp_controller_start_press_and_hold_cmd` supports arbitrary device buttons 343- AVRCP Controller: reassemble fragmented AVCTP packets 344- AVDTP: `avdtp_register_media_config_validator` allows to validate media codec configuration 345- A2DP Source: `ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG` disables auto config. requires call to `a2dp_source_set_config_{CODEC}` 346 347### Fixed 348- GAP: calculate IO Cap AuthReq Bondable Mode based on `gap_ssp_set_authentication_requirement` and `gap_set_bondable_mode` 349- GAP: only store link key for SSP if remote side has set bondable in io cap auth requirements 350- GAP: allow to disable link supervision timeout 351- GAP: fix `gap_connect` after `gap_connect_cancel` 352- GAP: re-configure advertisements after power cycle 353- HCI: handle start inquiry failure 354- L2CAP: fix create outgoing connection triggered from packet handler on hci disconnect event 355- L2CAP: return unknown mandatory option in config response 356- AVDTP: fix spelling `avdtp_set_preferred_sampling_frequency` 357- AVRCP Target: fix notification changed event 358- HFP: Emit audio connection released on SLC Release, e.g. on remote power off 359- HFP HF: fix audio connection setup if codec negotiation is supported 360- HFP HF: only emit single event for RING and AG Status updates 361- HFP AG: fix audio connection setup for in-band ringtone on incoming connection 362 363### Changed 364- Port Archive: moved ports that are not recommended for new designs to port/archive folder: 365 - MSP430: the ports used the older community GCC version without 20-bit support needed for code size > 64kB 366 - Broadcom/Cypress H5: uploading PatchRAM is only possible in H4 mode. It's better to also use H4 in general 367 - PIC32-Harmony: the port used Harmony v1 while Harmony v3 has been out since a while 368 - iOS: not supported 369- Run Loop Base: functionality used in most platform run loop implementations 370 - code from `btstack_run_loop_base.c` moved into `btstack_run_loop.c` to minimize changes to build systems 371 - `btstack_run_loop_base.c` is a placeholder and can be removed from build 372- HCI Dump: replace monolithic `hci_dump.c` (with many #ifdefs) into dispatcher with platform-specific implementations: 373 - `posix/hci_dump_posix_fs` - writes binary log file 374 - `posix/hci_dump_stdout` - log to console using printf with local system time 375 - `embedded/hci_dump_embedded_stdout` - log to console using printf 376 - `embedded/hci_dump_segger_stdout` - log to RTT console using `SEGGER_printf` 377 - `embedded/hci_dump_segger_binary` - writes binary log over RTT to host 378- HCI: config I2S for BCM Controllers if `ENABLE_SCO_OVER_PCM`, reduce bit clock to 256/512 kHz 379- btstack_uart_posix: supports SLIP frames and replaces `btstack_uart_block_posix` 380- hci_transport_h5: more performant H5 implementation that requires `btstack_uart_t` driver with SLIP support 381- POSIX Ports: use new `btstack_uart_posix` implementation 382- posix-h5/posix-h5-bcm: use even parity for UART 383- HCI Transport: extract convenience function declaration for h4, h5, em9304_spi, and usb into separate hci_transport_{type}.h 384- GAP: provide Device ID from EIR in GAP_EVENT_INQUIRY_RESULT 385- GAP: only store link key if it allows requested security level 386- GAP: abort SSP pairing if MITM protection required but not possible 387- SM: start pairing as Central for already encrypted connection on Slave Security Request 388- GATT Client: Use ATT_READ_REQUEST for first blob of Read Long Characteristic and Read Long Characteristic Descriptor 389- GATT Server: Allow ATT Read Callback to return custom ATT Error Code 390- Nordic SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 391 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 392- u-blox SPP Service Server: use `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` and `GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED` 393 events instead of callback, and `RFCOMM_DATA_PACKET` for received data 394- HID: Move `src/classic/hid.h` into `src` and prefix with `btstack_` to use it with BLE and avoid name clashes 395- HFP: provide acl_handle in events to identify connection 396- HSP AG: emit HSP_SUBEVENT_BUTTON_PRESSED instead of audio connection setup/release 397- Example: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes 398 399 400## Release v1.3.2 401 402### Added 403- GAP: support for Classic Out-of-Band (OOB) pairing via `gap_ssp_remote_oob_data` with `ENABLE_CLASSIC_OOB_PAIRING` 404- GAP: read local OOB data on start and on call to `gap_ssp_generate_oob_data`, provided via `GAP_EVENT_LOCAL_OOB_DATA` 405- HID Host: add profile, update `hid_host_demo.c` example 406 407### Fixed 408- L2CAP: make handling of HCI disconnect more robust 409- AVDTP: emit stream release for active stream if signaling connection is closed first, e.g. caused by HCI disconnect 410- AVRCP: fix issue when Controller and Target send at the same time 411 412### Changed 413- A2DP, AVDTP: use `a2dp_source_set_config_{TYPE}` and `avdtp_config{TYPE}_store` to avoid large number of parameters 414 415 416## Release v1.3 417 418### Added 419- CC256x: with ENABLE_CC256X_ASSISTED_HFP, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 420- BCM: with ENABLE_BCM_PCM_WBS, HFP enables WBS codec on demand and configures PCM/I2S interface for 8kH/16kHz 421- SDP Client RFCOMM: add `sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid` 422- HFP: `ENABLE_HFP_AT_MESSAGES` lets HFP emit `HFP_SUBEVENT_AT_MESSAGE_SENT` and `HFP_SUBEVENT_AT_MESSAGE_RECEIVED` 423- A2DP, AVDTP: provide capabilities and configuration events for A2DP codecs: SBC, MPEG Audio, MPEG AAC, ATRAC 424- A2DP + AVDTP Source: allow to send media packet with `avdtp_source_stream_send_media_packet` and `a2dp_source_stream_send_media_packet` 425- A2DP + AVDTP Source: add `avdtp_source_stream_send_media_payload_rtp` and `a2dp_source_stream_send_media_payload_rtp` 426- A2DP Source: emit `A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE` 427- A2DP Source: allow to configure endpoints by calling `a2dp_source_set_config_{TYPE}` during SEP discovery with SBC fallback 428 429### Fixed 430- HCI: keep `le connecting request` on connection complete active, fixes gap_auto_connection_stop() + gap_auto_connection_start() 431- L2CAP: fix packet size check for incoming classic basic channels (regression introduced in v1.2.1) 432- HFP AG/HSP AG: avoid connecting to remote service with same role 433- A2DP Source: support multiple Stream Endpoints with different Media Codec types 434- A2DP Source: emit codec configure event with reconfigure flag set on reconfigure 435- GATT Compiler: support multiple instances of the same service 436 437### Changed 438- GAP: provide Link Type parameter to incoming connection filter for `gap_register_classic_connection_filter` 439- HFP/GOEP Client/AVDTP/A2DP: return `SDP_SERVICE_NOT_FOUND` if no suitable SDP record is found 440- AVDTP Source: `avdtp_source_stream_send_media_payload` includes SBC Header and was deprecated 441- AVDTP/A2DP: use `avdtp_channel_mode_t` in `A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION` 442- A2DP: fix events and use `a2dp_cid`, `local_seid,` `remote_seid` field names in A2DP sub-events 443- GATT Client: Skip MTU exchange after MTU exchange on ATT Server 444- Ports: STM32-F103RB Nucleo + CC256x port removed 445- ESP32: enabled HFP Wide-Band Speech, disable classic secure connections in HSP/HFP demos 446 447 448## Release v1.2.1 449 450### Fixed 451- L2CAP: use connection handle for channel lookups 452- L2CAP: forward data only in open state 453 454### Changed 455- L2CAP: check packet size against local mtu for classic basic channels 456 457 458## Release v1.2 459 460### Fixed 461- L2CAP: trigger pairing for outgoing LE Data Channels if security level insufficient 462- SM: fix update of sc flag for re-encrypted connection in peripheral role 463- SM: send security request on re-connect if bonded and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is defined 464- ESP32: fix audio sink driver 465 466### Added 467- GAP: `gap_delete_bonding` removes device from LE Resolving List and from discards LE bonding information 468- GATT Client: delete bonding information if re-encryption fails and `ENABLE_LE_PROACTIVE_AUTHENTICATION` is not defined 469- GATT Client: gatt_client_set_required_security_level() allows to set required minimum security level for all GATT requests 470- SM: emit events for re-encryption started/complete when bonding information is available 471 472### Changed 473- AVRCP Controller: allow to send multiple absolute volume commands without waiting for response. 474- GAP: replaced `ENABLE_LE_CENTRAL_AUTO_ENCRYPION` with `ENABLE_LE_PROACTIVE_AUTHENTICATION` 475 476 477## Changes October 2020 478 479### Fixed 480- AVDTP Initiator: avoid use of remote seid for stream endpoint lookup, fixes issue with two connected devices 481- AVDTP Source: buffer for SBC media codec information got discarded, leading to invalid Set Configuration command in second connection 482- SM: only trigger Cross-Transport Key Derivation (CTKD) when bonding is enabled 483- SM: set LinkKey flag to request CTKD if enabled 484- SM: store CTKD key with Public Identity Address 485- SM: only allow CTKD to overwrite existing link key if derived key has same or higher authentication 486- SM: start SMP Timeout when sending Security Request 487- HFP HF: fix response to AG Codec Selection while waiting for OK of parallel command 488- HCI: fix reject of LE remote connection param request via HCI 489 490### Added 491- GAP: add `gap_get_link_key_for_bd_addr` 492- GAP: add `gap_bonded` to check if bonding information is available for active connection 493- SM: support h7 for CTKD 494 495### Changed 496- SM: Cross-Transport Key Derivation requires `ENABLE_CROSS_TRANSPORT_KEY_DERIVATION` now 497- SM: block connection if encryption fails for bonded devices as Central 498- SM: support pairing as Central after failed re-encryption 499 500 501## Release v1.1 502 503### Fixed 504- AVRCP/AVCTP: report AVRCP 1.6 and AVCTP 1.4 in SDP record 505 506### Added 507 508### Changed 509 510 511## Changes September 2020 512 513### Fixed 514- HFP: fix parsing of ranges e.g. in +CIND responses 515- AVDTP, AVRCP: fix bugs due to transaction id overrun 516- A2DP Source: fix issues with stream configuration by sink 517- hci_dump: fix tv_us calculation for non-posix / embedded systems with binary output 518 519### Added 520- `btstack_ring_buffer`: add `btstack_ring_buffer_reset` to reset it to initial state/empty 521- GAP: Support for address resolution of resolvable private addresses by Controller with `ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION` 522 523### Changed 524- AVDTP, AVRCP, HSP: schedule SDP query, avoids avoids 'command disallowed' if SDP client is busy 525- HSP, HFP: allow to configure usable SCO packet types 526- cc256x: update CC256xC init script to v1.4 527- A2DP Source: use Get All Capabilities if supported by remote get Delay Reporting capability 528 529## Changes August 2020 530 531### Fixed 532- ESP32: fix authentication for incoming Secure Connections 533- AVDTP: Fix forwarding of Delay reports 534- STM32-F4Discovery: fix pan_lwip_http_server by increasing HCI_ACL_PAYLOAD_SIZE 535- tool/create_packet_log: basic support for 16-bit Unicode log files from Windows 536 537### Added 538- `btstack_run_loop_base`: added `btstack_run_loop_base_dump_timer` 539- GAP: request role change for classic connection via `gap_request_role` 540- GAP: LE Whitelist API with `gap_le_whitelist_x` with x = add, remove, clear and new `gap_connect_with_whitelist` 541- SDP Client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready() 542- BNEP lwIP: add `bnep_lwip_connect` to establish BNEP connection and manage lwIP network interface 543- New `btstack_linked_queue` utility, a linked list-based queue with first-in-first-out semantics and constant time enqueue/dequeue operations 544- btstack_tlv_posix: add `btstack_tlv_posix_deinit` 545- New `btpclient` for use with [auto-pts project](https://github.com/intel/auto-pts) 546 547### Changed 548- GAP: treat AES-CCM encrypted connection as mutually authenticated (BIAS) 549- GAP: 'gap_auto_connect_x' API deprecated. Please directly manage LE Whitelist with `gap_le_whitelist_*` functions and call `gap_connect_with_whitelist` instead 550- example/hid_host_demo: try to become master for incoming connections 551- btstack_run_loop: use btstack_assert instead of local while(true) 552- att_db_util: allow to reset att_db via `att_db_util_init` 553 554## Changes July 2020 555 556### Fixed 557- AVDTP: fix invalid response for Get Capabilities request if Delay Reporting was supported 558- AVDTP: handle concurrent signaling establishment with reject and retry 559 560### Added 561- example/hid_host_demo: support reconnect from HID device 562- Crypto: support software AES128 for AES-CCM operations 563- AVRCP: introduced AVRCP_FEATURE_MASK_* as alternative to avrcp_controller_supported_feature_t and avrcp_target_supported_feature_t enums 564- btstack_audio: add set_volume() to sink and set_gain() to source interfaces, minimal volume control for portaudio playback 565- 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 566- GAP: Provide gap_get_role to query master/slave role for HCI connection handle 567- GAP: Provide gap_pin_code_response_binary to use binary data as PIN, e.g. for pairing with Nintendo Wii Remote 568 569### Changed 570- GAP: set minimum required encryption key size for Classic connections back from 16 to 7, matching the Core spec 571 572 573## Changes June 2020 574 575### Fixed 576- HFP: Fix parsing of empty fields, e.g. phone number in +CLCC and other AT commands 577- SM: Fix validation of confirm value for secure connection Passkey entry 578- AVRCP: handle concurrent signaling establishment with reject and retry 579 580### Added 581- GAP: Detect Secure Connection -> Legacy Connection Downgrade Attack by remote features and actual encryption type (BIAS) 582- GAP: Mutual authentication: request authentication after Classic connection got encrypted (BIAS) 583- Windows port for Dialog DA14585 connected via serial port 584 585## Changes 586- CVSD PLC: treat zero frames as good and allow to mark data as bad, e.g. if reported by Controller as erroneous 587 588## Changes May 2020 589 590### Fixed 591- hfp_hf, hsp_hs: use eSCO params in accept sco connection only for incoming eSCO connections 592- pbap_client: fix PBAP UUID len on connect message 593- SM: fix secure connection pairing as peripheral when local user confirmation happens after remote one 594- A2DP Source: only connect to remote sink stream endpoints 595- btstack_hal_flash_memory: fix write of 0xff bytes to simulated flash 596- hsp_hs: fix disconnect if audio not connected 597- hsp_ag: fix accept incoming connection 598 599### Added 600- example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing 601- GAP: gap_set_security_level sets required security level for incoming and outgoing connections 602- cc256x: allow to specify power vector for each modulation type 603- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit 604- SM: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode 605- GAP: enable BR/EDR Secure Connections if supported, add gap_secure_connections_enable 606 607### Changed 608- L2CAP ERTM: send extended features request only once per HCI connection 609 610 611## Changes April 2020 612 613### Fixed 614- hog_mouse_demo/hog_keyboard_demo: handle set protocol mode = boot protocol mode 615- HCI: only update BD_ADDR placeholder in shortened and complete name in EIR data, limit device name to 240/248 bytes 616 617### Added 618- GAP: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections 619- example: hog_boot_host_demo implements an HID-over-GATT Boot Host that supports keyboard and mouse 620- HCI: add ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS that forces fragmentation of ACL-LE packets to fit into over-the-air packet 621 622### Changed 623- Broadcom/Cypress: wait 300 ms after PatchRAM update in hci.c to assert Controller is ready 624- esp32: provide esp-idf/component/btstack/btstack_port_esp32.c and only minimal app_main in template/main/main.c 625- att_db: skip att_read_callback for ATT Read Blob Request if offset == value_len 626 627 628## Changes March 2020 629 630### Fixed 631- GAP: fixed gap_set_scan_parameters() if issued right before gap_start_scan() 632- HCI: only send HCI Read Local Encryption Key Size if supported by Controller 633 634### Added 635- GATT Client: allow to register for any notification/indication and/or any connection 636- HCI: added hci_read_inquiry_scan_activity and hci_write_inquiry_scan_activity commands 637- chipset: assert hci packet buffers are suitable for firmware upload or patches (atwilc3000,bcm,cc256x,intel) 638- btstack_util: added btstack_replace_bd_addr_placeholder 639 640### Changed 641- AVRCP Target: volume in avrcp_target_volume_changed is reported as current value in interim response to register for volume change notifications 642- SDP Client: query attributes 0x0000..0xffff instead of 0x0001..0xffff to match other stacks / improve compatibility with bad sdp server implementations 643 644 645## Changes Februar 2020 646 647### Fixed 648- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED 649- HCI: handle reconnect request for Classic and LE connections triggered by packet handler for Disconnection Complete Event 650 651### Changed 652- hid_host_mode: allow sniff mode 653 654### Added 655- 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 656 657 658## Changes January 2020 659 660### Fixed 661- L2CAP ERTM: avoid read-after-free on decline of incoming connection 662- GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors 663- att_db_util: fix realloc of att db buffer for large attributes 664- btstack_tlv_posix: only keep last value in memory, fix delete operation 665- l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported()) 666 667### Added 668- att_db_util: provide GATT Database Hash via att_db_util_hash_calc 669- GATT Compiler: provide GATT Database Hash via GATT_DATABASE_HASH Characteristic 670- ATT Server: validate request pdu length 671 672### Changed 673- Crypto: update AES-CMAC implementation to access all message bytes sequentially 674 675 676## Changes December 2019 677 678### Fixed 679- example/pan_lwip_http_server: use Network Access Point, CoD 680- sm: emit pairing complete in master role when no keys are distributed / bonding disabled 681 682### Added 683 684### Changed 685- Updated CC256x initscript: CC256xC v1.3 686- ESP32: add CMake project files 687 688 689## Changes November 2019 690 691### Fixed 692- AVDTP Source: return correct `avdtp_cid` and `local_seid` in `AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW` 693- L2CAP: send LE Data Channel SDUs round robin with other data 694- L2CAP ERTM: send ERTM I-frames round robin with other data 695 696### Added 697- ATT Server: return error if request to send now for Notification or Indication already registered 698- Linked List: return if item was added for `btstack_linked_list_add[_tail]` 699- btstack_run_loop_remove: return bool true if timer/data source was removed 700- segger-rtt: allow to configure with `SEGGER_RTT_PACKETLOG_*` directives, update to v6.54 701- GAP: support setting Link Supervision Timetout for outgoing Classic connections using `gap_set_link_supervision_timeout` 702- lwip: add download test files to http server demo 703 704### Changed 705- Linked List: return bool true if item was removed 706 707 708## Changes October 2019 709 710### Fixed 711 712### Added 713- `btstack_bool.h`: provide boolean type 'bool' via `<stdbool.h>` or as backport 714- provide `btstack_assert(condition)` 715- H4 Transport: avoid calling `hci_transport_h4_trigger_next_read` when transport is closed 716 717### Changed 718- libusb and posix ports: store bonding information in TLV 719 720 721## Changes September 2019 722 723### Fixed 724- L2CAP ERTM: assert that packet can be stored in fragment buffers in ertm 725- L2CAP ERTM: reject incoming connection if ERTM is configured as mandatory but not supported by remote 726- GATT Client: allow Write Without Response independent of other requests 727 728### Added 729- GAP: allow to reject GAP classic connection via gap_register_classic_connection_filter 730- GAP: support reading RSSI for Classic+LE using gap_read_rssi. Emits `GAP_EVENT_RSSI_MEASUREMENT` 731 732### Changed 733- Bluetooth and BTstack Error Codes and Events: collect status codes in bluetooth.h and events in btstack_defines.h 734- bluetooth.h: extract internal defintitions to respective protocol layers 735- Updated CC256x initscripts (CC256xB v1.8, CC256xC v1.2, CC256xC v1.2) 736 737 738## Changes August 2019 739 740### Fixed 741- POSIX, WICED, Windows, FreeRTOS run loops: handle time_ms overrun after 49 days 742- RFCOMM: accept incoming L2CAP connection in Basic mode if ERTM is enabled but not requested for this connection 743- RFCOMM: limit RFCOMM MTU by local L2CAP MTU for outgoing connections (only revelvant for ERTM) 744- L2CAP ERTM: stop timers on disconnect 745- L2CAP ERTM: fix sending of segmented SDUs 746- L2CAP ERTM: handle unsupported Information Response 747- SM: generate local nonce for confirm value in JW+NC+PK in Secure Connections Responder role 748 749### Added 750- `btstack_run_loop_base`: portable implementation of timer and data source management as base for platform specific implementations 751 752## Changed 753- FreeRTOS: use xQueueCreateStatic (static variant of xQueueCreate) if available for static memory-only setups 754- L2CAP ERTM: handle invalid Information Response (assume no extended features supported) 755- POSIX: use monotonic clock as timebase if available 756- HCI Transport H4/H5/EM9304 SPI: ignore block read/sent from UART driver when closed 757- HCI: Read Encryption Key Size after encryption was enabled 758- Errata 11838: 759 - GAP: gap_set_required_encryption_key_size allows to set the required key size, default = 16 (max) 760 - GAP: validate encryption key size to emit GAP Security Levels 761 762## Changes July 2019 763 764### Fixed 765- SM: Fixed regression introduced in f3582630 766- L2CAP: avoid reading l2cap signaling command len out of bounds 767- HCI Transport H4/H5/EM9304 SPI: fix payload size checks (also for 8/16-bit platforms) 768 769### Changed 770- SM: Start encryption upon receiving slave securiy request if bonded 771- hci: use 2 as HCI_INCOMING_PRE_BUFFER_SIZE in LE-only configuration for GATT Client 772 773--- 774 775## Changes June 2019 776 777### Changed 778- FreeRTOS: use freertos/.. prefix to include FreeRTOS headers if HAVE_FREERTOS_INCLUDE_PREFIX is defined 779- BNEP: add Connection Handle to BNEP_EVENT_CHANNEL_OPENED 780- Examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate suppport for GATT over BR/EDR 781 782### Fixed 783- BNEP: Bluetooth address is stored in little-endian format for all BNEP_EVENT_* 784- libusb: avoid use-after-free for SCO packets on disconnect 785 786### Added 787- example: pan_lwip_http_server using lwIP as network stack to implement PAN NAP service 788- platform/lwip/bnep_lwip.c: BNEP lwIP adapter that forwards packets between BNEP service and lwIP 789- ENABLE_GATT_OVER_CLASSIC enables support for GATT over BR/EDR in att_server 790 791--- 792 793## Changes May 2019 794 795### Changed 796- ESP32: Configure SCO over HCI after power up 797- btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero. When ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD 798 is defined, an explicit delete field is used to indicate an invalid entry. 799 800### Fixed 801- SM: Avoid potential use-after-free on immediate disconnect (lookup connection via con handle instead of storing pointer) 802 803### Added 804- gatt_client: emit query complete event for signed write operation 805- hci_transport_h4: add workaround for flow control bug in CYW2070x, enable with ENABLE_CYPRESS_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND 806 807--- 808 809## Changes April 2019 810 811### Changed 812- ESP32: use micro-ecc from 3rd-party as esp-idf removed it in their 3.3 release 813 814### Fixed 815- hci: pad LE Scan response with zeroes 816- SM: store local CSRK 817- ATT DB: call write callback for validated signed writes 818- ATT Server: abort signed write validation on incoming new request 819- Bluetooth SIG web scraping tools updated 820- libusb: compiles for FreeBSD 821 822### Added 823 824--- 825 826## Changes March 2019 827 828### Changed 829- use Makefile for stm32-f4discovery-cc256x port 830- le_device_db: add secure_connection argument to le_device_db_encryption_set and le_device_db_encryption_get 831 832### Fixed 833- SM: Use provided authentication requirements in slave security request 834 835### Added 836- port/stm32-f4discovery-cc256x: add support for built-in MEMS microphone 837- SM: Track if connection encryption is based on LE Secure Connection pairing 838- ATT DB: Validate if connection encrypted is based on SC if requested 839- att_db_util: support ATT_SECURITY_AUTHENTICATED_SC permission flag 840- GATT Compiler: support READ_AUTHENTICATED and WRITE_AUTHENTICATED permsission flags 841- ESP32: erase nvs flash is newer nvs version found 842- libusb: add support for nRF52840-PCA10056 running Zephyr hci_usb example 843- port/stm32-l073rz-nucleo-em9304 for Nucleo L073RZ with EM9304 DVK, replaces port/stm32-l053r8-nucleo-em9304 844 845## Changes February 2019 846 847### Changed 848- example/a2dp_sink_demo: use linear resampling to fix sample rate drift 849- btstack_audio: split interface into sink and source 850 851### Fixed 852- Crypto: fix lockup when stack is shutdown while waiting for result of HCI Command, e.g. LE Read Local P256 Public Key 853- SM: Avoid SM_EVENT_PAIRING_COMPLETE with ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION after successful pairing in responder role 854 855### Added 856- example/a2dp_sink_demo: add target role, support volume control on both devices 857- example/audio_duplex: playback audio audio source on audio sink (test audio path) 858- btstack_audio_embedded: implement audio source path 859 860--- 861 862## Changes January 2019 863 864### Changed 865- L2CAP: provide channel mode (basic/ertm) and fcs option in L2CAP_EVENT_CHANNEL_OPENED 866- RFCOMM: support L2CAP ERTM. Callbacks passed to rfcomm_enable_l2cap_ertm() are used to manage ERTM buffers 867 868### Added 869- L2CAP: emit L2CAP_EVENT_ERTM_BUFFER_RELEASED if ERTM buffer not needed/used anymore 870- L2CAP: add fcs_option to ERTM config l2cap_ertm_config_t 871- HCI: validate advertisement data length field when generating GAP_EVENT_ADVERTISING_REPORT 872- ad_parser: validate data element length fields in ad_iterator_has_more 873- Raspberry Pi 3 A+/B+ port in port/raspi, starts without power cycle 874 875### Fixed 876- HCI: release outgoing buffer on disconnect if waiting to send another ACL fragment 877- POSIX: use correct baudrate enums for baud rates higher than 921600 (Linux) 878- Crypto: directly process queued crypto operation on HCI result 879 880--- 881 882## Changes December 2018 883 884### Added 885- SM: generate and store ER / IR keys in TLV, unless manually set by application 886- hci_dump: support PacketLogger or BlueZ format output via SEGGER RTT Channel 1 Up 887 888### Fixed 889- SM: fix internal buffer overrun during random address generation 890 891## Changes November 2018 892 893### Added 894- GAP: gap_le_connection_interval provides connection interval for conn handle 895- Nordic SPP Service Server: GATT service that emulates a serial port over BLE based on Nordic Semiconductor documentation. 896- uBlox SPP Service Server: GATT service that emulates a serial port over BLE based on uBlox documentation. 897- SM: ENABLE_LE_CENTRAL_AUTO_ENCRYPTION triggers automatic encryption on connect to bonded devices 898- SM: generate and store ER / IR keys in TLV, unless manually set by application 899 900### Fixed 901- SM: prevent random address updates if gap_random_address_set was used 902- SM: fix internal buffer overrun that can cause storing of bonding information to fail 903- SM: ignore Slave Security Request after sending own Pairing Request 904- L2CAP: fix use after free on disconnect if ERTM is enabled 905- HFP: Handle multiple commands/responses in single RFCOMM packet 906- Memory Pools: clear all buffers before use 907 908--- 909 910## Changes October 2018 911 912### Added 913- SDP Server: queue incoming connections when already connected instead of rejecting them 914- 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. 915- HIDS Device: GATT service that exposes HID reports intended for HID Devices, like keyboard and mouse. 916 917### Fixed 918- HCI: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry 919- L2CAP: fix issue with outgoing connection before read remote supported complete when other channels exist 920- L2CAP ERTM: allow SDU of szie MPS in first packet that contains L2CAP SDU Length 921- L2CAP ERTM: fix memory corruption triggered if local_mtu > mps 922- L2CAP ERTM: fix outgoing fragment management 923- HFP: decline incoming RFCOMM connection after outgoing connection was started 924- AVRCP: fix crash on disconnect of connection established by remote 925 926--- 927 928## Changes September 2018 929 930### Fixed 931- HCI: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 932- L2CAP: Error creating outgoing connection (e.g. Connection Limit Exceeded) now handled 933- L2CAP: Evaluate 'can send now' on HCI Disconnect as ACL buffers in Bluetooth Controller have been used for the closed connection are freed implicitly 934- L2CAP: Check can send now before sending extended information requeste needed for ERTM mode 935- L2CAP: Use valid signaling identifier for L2CAP Connection Parameter Update Request 936- 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 937- RFCOMM: Avoid use-after-free on channel finalize 938- GATT Client: stop timer on disconnect - fixes use after free / crash 939 940### Added 941- A2DP Source: Support stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency) 942- 3rd-party: yxml is used for PBAP vCard list parsing 943- cc256xC: new v1.1 init scripts 944 945--- 946 947## Changes August 2018 948 949### Added 950- PBAP: added pbap_get_phonebook_size() to get phonebook entry count 951 952### Fixed 953- GATT Server: Allow enable Notifications/Indication with Write Command. Fixes issue with some Android devices. 954- SM: fix pairing for Secure Connections with Bonding if remote sends additional keys 955- SM: drop LTK flag from Pairing Response for Secure Connections 956- L2CAP: fix emitted L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_REQUEST 957 958## Changes June 2018 959 960### Added 961- btstack_audio.h: application level API for audio playback and recording 962- embedded/hal_audio.h: low-level API for audio playback and recording 963- HID Device: hid_device_connect(..) function 964- ESP32: implement hal_audio 965- DA14585: support for Dialog Semiconductor DA14585 LE-only controller 966- Raspberry Pi 3 + Raspberry Pi Zero W port in port/raspi 967 968### Changed 969- Errata 10734: 970 - SM: Generate new EC Public Keypair after each pairing 971 - SM: Abort failure with DHKEY_CHECK_FAILED if received public key is invalid (instead of unspecified error) 972- btstack.h: only include classic headers if ENABLE_CLASSIC is defined 973- windows: ignore virtual Bluetooth adapter provided by VMware 974- Replaced HCI_PACKET_BUFFER_SIZE with HCI_INCOMING_PACKET_BUFFER_SIZE and HCI_OUTGOING_PACKET_BUFFER_SIZE 975 976--- 977 978## Changes June 2018 979 980### Fixed 981- HFP: Fix Wide Band Speech bit in SDP record for both HF/AG. Missing bit prevents macOS from using mSBC 982- ATT Server: send ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE with status ATT_HANDLE_VALUE_INDICATION_DISCONNECT on disconnect 983- AVRCP Controller: fix parsing of now playing info 984 985### Changed 986- ATT Server: ATT_HANDLE_VALUE_INDICATION_DISCONNECT is delivered to service handler if registered 987 988### Added 989- ATT Server: packet handler field added to att_service_handler_t to receive: connect/disconnect, atu exchange, indication complete 990 991--- 992 993## Changes May 2018 994 995### Added 996- GAP: re-encrypt outgoing connection if bonded 997- ATT Server: wait until re-encryption is complete 998- GATT Client: wait until re-encryption is complete 999- ATT Server: added att_server_request_to_send_notification and att_server_request_to_send_indication 1000- GATT Client: if ENABLE_GATT_CLIENT_PAIRING, GATT Client starts pairing and retry operation on security error 1001 1002### Changed 1003- ATT Server: att_server_register_can_send_now_callback is deprecated, use att_server_request_to_send_notification/indication instead 1004 1005### Fixed 1006- SM: Fix LE Secure Connection pairing in Central role 1007- le_device_db_tlv: fix seq nr management 1008- SM: improve le_device_db lookup and storing of IRK 1009- GATT Server: fix lookup for Client Characteristic Configuration in services with multiple Characteristics 1010- RFCOMM: emit channel closed on HCI/L2CAP disconnect after sending DISC while expecting UA 1011 1012--- 1013 1014## Changes April 2018 1015 1016### Added 1017- Crypto: btstack_crypo.h provides cryptographic functions for random data generation, AES128, EEC, CBC-MAC (Mesh) 1018- SM: support pairing using Out-of-Band (OOB) data with LE Secure Connections 1019- Embedded: support btstack_stdin via SEGGER RTT 1020 1021### Changed 1022- att_db_util: added security requirement arguments to characteristic creators 1023- SM: use btstack_crypto for cryptographpic functions 1024- GAP: security level for Classic protocols (asides SDP) raised to 2 (encryption) 1025 1026### Fixed 1027- HFP: fix answer call command 1028- HCI: fix buffer overrun in gap_inquiry_explode 1029- SDP: free service record item on sdp_unregister_service 1030 1031## Changes March 2018 1032 1033### Added 1034- GAP: allow to limit number of connections in LE Peripheral role with gap_set_max_number_peripheral_connections 1035- ATT Server: support for delayed ATT read response, see example/att_delayed_read_response.c 1036- ATT Server: allow to specify security requirements seperately for read/writes. .h files need to be regenerated 1037 1038### Fixed 1039- RFCOMM: fix infinite loop on L2CAP connection error (regression from 4c3eeed1) 1040- HSP HS: accept incomming SCO connection 1041- SM: fix iteration over LE Device DB entries for bonding and address resolving 1042- SM: store pairing information only if both devices have requested bonding 1043 1044--- 1045 1046## Changes February 2018 1047 1048### Added 1049- GATT Client: gatt_client_request_can_write_without_response_event() causes GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE 1050- SM: new event SM_EVENT_PAIRING_COMPLETE 1051- GAP: support iteration over stored Classic link keys: gap_link_key_iterator_init, gap_link_key_iterator_get_next, gap_link_key_iterator_done 1052- GAP: add gap_delete_all_link_keys 1053 1054### Changed 1055- GATT Client: round robin for multiple connections 1056- ATT Dispatch: round robin for ATT Server & GATT Client 1057- L2CAP: round robin for all L2CAP channels (fixed and dynamic) 1058- btstack_link_key_db: addition functions for link key iteration 1059- GAP: LE scanning enabled not reset on HCI Reset -> can be enabled before HCI Power Up 1060- CSR: set all keys in psram instead of default 1061 1062### Fixed 1063- tc3556x: fix startup after baud rate change 1064 1065--- 1066 1067## Changes January 2018 1068 1069### Added 1070- Port for Windows with Zephyr HCI Firmware connected via serial port 1071- em9304: upload patch containers during HCI bootup 1072- Makefile for STM32-F4Discovery port 1073- support for console out via SEGGER RTT 1074- LE Data Channels example in BTstack and [iOS example on GitHub](https://github.com/bluekitchen/CBL2CAPChannel-Demo) 1075- LE Streamer Client can send as fast as possbile as well 1076- L2CAP: option to limit ATT MTU via l2cap_set_max_le_mtu 1077 1078### Changed 1079- HCI: allow to set hci_set_master_slave_policy (0: try to become master, 1: accept slave) 1080- GAP: gap_set_connection_parameters includes scan interval and window params 1081- GATT Client: GATT_EVENT_MTU indicates max MTU 1082- ATT DB Util: attribute handle is returned for new Services and Characteristics 1083 1084### Fixed 1085- Windows: retry serial port operations if not all bytes have been read/written 1086- HFP: avoid buffer overflows setting up messages 1087- SBC Decoder: improved error handling for invalid SBC audio data 1088- GAP: fix Connection Parameter Response in Central role 1089- ATT DB Util: update pointer to database in case of realloc 1090- GATT Client: set UUID16 field if 16-bit UUID is stored as UUID128 1091- GAP: release HCI Connnection after gap_le_conne 1092- ATT: Exchanged MTU is propagate to ATT Server and GATT Client 1093 1094--- 1095 1096## Changes December 2017 1097 1098### Added 1099- Introduced btstack_network.h network interface abstraction 1100- btstack_network_posix implementation using Linux tun/tap interface 1101- WICED: support for btstack_stdin (HAVE_STDIN) 1102- 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. 1103- TLV: global TLV instance available via btstack_tlv_get_instance() (src/btstack_tlv.h) 1104- TLV: POSIX implementation that appends to a file on disk (platform/posix/btstack_tlv_posix.c 1105- LE Device DB TLV: overwrite oldest entry if no free entries available 1106- SM: allow to set fixed passkey in display role using sm_use_fixed_passkey_in_display_role 1107- Example/hid_host_demo with HID parser and support for basic US keyboard layout 1108- 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 1109- Port for Apollo2 MCU with EM9304 (ports/apollo2-em9304) 1110 1111### Changed 1112- panu_demo: uses btstack_network.h now 1113- WICED: configure printf to replace Linefeed with CRLF 1114- SBC: split btstack_sbc_bludroid.c into seperate encoder and decoder implementations 1115 1116### Fixed 1117- RFCOMM: support connection requests during connection failure 1118- L2CAP: support connection requests during connection failure 1119- L2CAP: fix default remote MTU as 672 instead of 48 (Minimal MTU) 1120- HCI: avoid double free during halting 1121- SM: fixed reconnect using legacy pairing in slave role 1122 1123 1124