0.22.1 - 2021.05.26

• Fix warnings "changing start of section .bss by 4 bytes"
• Fix various warnings when compiling with all warnings.
• Bump included TinyUSB to 1.0.3
• remove Raytac MDBT50Q - RX variant
• Update included bootloader binaries from 0.3.2 to 0.5.0
• Use CMSIS 5.4 header from tool package
• Fix nrfjprog file not file on windows.
• Update included adafruit-nrfutil binaries for windows and macos to version 0.5.3post16

0.22.0 - 2021.05.19

This version implement comprehensive LESC and Legacy pairing using dynamic & static Passkey.

• Support static passkey (Legacy only)
• Support LESC on nRF52840 using hardware-accelerated ARM CryptoCell CC310 provided by Adafruit_nRFCypto. The library is included as submodule and released together with the BSP.
• Rework bonding mechanism to use IRK for peer finding. It is advisable to run clearbonds example to clean up bond files of previous version
• Add setPins() to SPI class
• Fix bug that with saving cccd data
• Add more pinMode type: INPUT_SENSE_HIGH, INPUT_SENSE_LOW, OUTPUT_S0S1 etc ...
• Optimize mutex usage in UART
• Add analogReadVDD() function
• Update itoa.c for compiling with c++17
• Fix BLEBeacon endian for major and minor
• Fix compiling with MIDI v5, adding stub for BLEMidi's beginTransmission() and endTransmission()
• Update BSP core to work with Adafruit_TinyUSB_Arduino version 1.0.0

BLESecurity

A new class BLESecurity (access with Bluefruit.Security) is added to handle security and pairing.

• setPIN() to set static passkey, this will force to use Legacy Pairing
• setIOCaps() to congiure IO capacities
• setMITM() to enable/disable Man in The Middle protection (passkey), it is auto-enabled when using passkey
• setPairPasskeyCallback() to register callback for displaying pairing passkey to user
• setPairCompleteCallback() to register callback for the result of pairing procedure (succeeded or failed)
• setSecuredCallback() to register callback which invoked when connection is secured. This happens after he pairing procedure is complete, or we re-connect with preivously bonded peer device

Other Changes

BLECentral

• will automatically use stored Long Term Key to secure connection if paired/bonded with device previously

Bluefruit

• Bluefruit::requestPairing() is removed, please use the BLEConnection::requestPairing() instead
• Bluefruit::connPaired() is removed, please use BLEConnection::secure() instead
• Default Device name is USB_PRODUCT if available e.g CLUE, Circuit Playground Bluefruit, Feather nRF52840 Express etc ...
• Rename function for consistency BLEPeriph's setSlaveLatency() to setConnSlaveLatency()

BLEService

• Added setPermission()

BLEConnection

• BLEConnection::requestPairing() is now non-blocking, it will return right after sending request to peer device. Previously it is blocked until the pairing process is complete.
• Added BLEConnection::secured() to check if the connection is secured/encrypted
• Added BLEConnection::bonded() to check if we store Longterm Key with current peer
• Removed BLEConnection:paried(), user should either use secured() or bonded() depending on the context
• If bonded, getPeerAddr() will return peer public address instead of random address.
• Rename getConnSupervisionTimeout() to getSupervisionTimeout()

New Example Sketches

• pairing_pin to use static PIN for peripheral role
• pairing_passkey to use dyanmic Passkey for pairing. On Arcada compatible device such as CLUE or Circuit Playground Bluefruit, TFT display will also be used to display passkey.
• cental_pairing similar to pairing_passkey but for nRF running central role
• ancs_arcada for displaying ancs on arcada such CLUE and/or CPB.
• arduino_science_journal add sketch to run with Arduino Science Journal
• adv_AdafruitColor example to tie Arduino to CircuitPython BLE color

0.21.0 - 2020.08.31

Special thanks to @henrygab, @pyro9, @Nenik, @orrmany, @thaanstad, @kevinfrei for contributing and helping with this release.

• Reworked HardwarePWM, analogWrite, Servo, Tone to address PWM hardware conflict with ownership.
• Reworked Tone to use no interrupt handler
• Added multiprotocol support such as ANT with additional ANT_LICENSE_KEY (require 3rd party library)
• Fixed pgm_read_ptr(addr) macro
• Updated & enhanced TinyUSB performance, usb event, task switching is much faster
• Fixed BLE Characteristic discovery when the central device returns more than 4 Characteristics in a discovery request
• Enhanced micro() to use DWT cyclecount if enabled for higher precision
• Fixed miscalculated tick when sleeping with delay()
• Fixed FPU-caused power consumption issue
• Added Wire.setPins()
• Added resumeLoop()
• Renamed I2C terminology
• Support precompiled library with compiler.libraries.ldflags e.g BSEC BME680
• Added Hardware/tone_happy_birthday example sketch

0.20.5 - 2020.07.05

• Updated toolchain from gcc 7-2017q4 to 9-2019q4
• Fixed GPIOTE channel conflict between libraries
• Added type-safe for arrcount() macros
• Added truncate() and rename() to Internal Filesystem (LittleFS).
• Update CMSIS from v4 to v5 to build with TensorFlow
• Update TinyUSB core to commit 0749077

Special thanks to @henrygab, @pyro9, @geeksville for contributing and helping with this release.

0.20.1 - 2020.04.23

• Update TinyUSB to commit c59fa77 due to a bug in the stack
• Fixed Wire write ambiguous
• Improved debugging with log and sysview, thanks to @henrygab
• Fixed recipe to compute SRAM and ROM of sketch
• Removed the force waiting Serial when debug is enabled
• Updated nrfx to v2.1.0
• Updated TinyUSB to commit 718db7e

0.19.0 - 2020.03.12

• Add BLECharacteristic::isFixedLen()
• Enhance and add new Playground sensor services
  • Quaternion
  • Sound
  • Color
  • Proximity
  • Gesture
• Fix sporadic hangup when stopping notifies, thanks to @FariSoftware PR #444
• Rename image_upload sketch to image_transfer
• Update bluefruit_playground sketch to work with CPB, CLUE and Sense
• Upgrade SystemView to v3.10, thanks to @henrygab PR #437
• Fix D13 LED_BUILTIN for Feather Sense
• Skip waiting for Serial in some examples, force wait for Serial when Debug is enabled
• Update bootloader binary from 0.3.0 to 0.3.2

0.18.5 - 2020.02.19

• Add macro SPI_32MHZ_INTERFACE to variant to select SPI or SPI1 to use 32mhz SPIM3
• Add PIN_BUZZER to variants with built-in speaker
• Enhance Particle Xenon support, PR #435 thanks to @outlandnish and @jaswope
• Rename cplay_ble.ino to bluefruit_playground.ino
• Use USB_PRODUCT string for default bledis model
• Increase attr table size for 840 to from 0xC00 to 0x1000
• Add more Adafruit sensor service: Gyro, Magento, Humid, Baro
• Upadte image_upload.ino to support CLUE with built-in TFT

0.18.0 - 2020.02.03

• Add EXTERNAL_FLASH_USE_QSPI to all variants that has on-board flash

0.17.0 - 2020.02.01

Core

• Add board support for Adafruit CLUE, Feather nRF52840 Sense
• Add board support Raytac MDBT50Q_RX dongle, thanks to @pyro9 PR #328
• Update bootloader binary to 0.3.0
• Addd PIN_BUTTON for variants
• Add SoftwareTimer getID/setID
• Add INPUT_PULLUP/DOWN_SENSE mode, PR #427, thanks to @jpconstantineau
• Support Serial event parity SERIAL_8E1, PR #369, thanks to @prjh
• Support Serial2, migrate uart driver to UARTE, PR #315, thanks to @ogatatsu
• Fix various bugs

BLE

• Add *image_eink_upload8 example sketch
• Add Nordic Led Button service example nrf_blinky sketch
• Increase SD RAM for nRF52832
• Fix Discovery bug, PR #413, thanks to @ogatatsu

0.16.0 - 2020.01.10

• Fix Little FileSystem (LFS) reentrance issue, by serialize access to lfs_* API(). Huge thanks to @hentrygab for spending lots of his time on PR #397
• Fix SPIM transfer with length > 64 KB bytes
• Fix #352 PDM issue
• SchedulerRTOS::startLoop() support stack size and task priority parameters