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Changelog

All notable changes to this project will be documented in this file.

[Unreleased]

Changed

  • NimBLESecurity class removed.

Added

  • NimBLEDevice::setDeviceName to change the device name after initialization.
  • NimBLEHIDDevice::batteryLevel returns the HID device battery level characteristic.

[1.4.1] - 2022-10-23

Fixed

  • Compile warning removed for esp32c3
  • NimBLEDevice::getPower incorrect value when power level is -3db.
  • Failed pairing when already in progress.

Changed

  • Revert previous change that forced writing with response when subscribing in favor of allowing the application to decide.

Added

  • Added NimBLEHIDDevice::batteryLevel.
  • Added NimBLEDevice::setDeviceName allowing for changing the device name while the BLE stack is active.
  • CI build tests.
  • Missing items in CHANGELOG that were not recorded correctly

[1.4.0] - 2022-07-10

Fixed

  • Fixed missing data from long notification values.
  • Fixed NimbleCharacteristicCallbacks::onRead not being called when a non-long read command is received.

Changed

  • Updated NimBLE core to use the v1.4.0 branch of esp-nimble.
  • AD flags are no longer set in the advertisements of non-connectable beacons, freeing up 3 bytes of advertisement room.
  • Config option CONFIG_BT_NIMBLE_DEBUG replaced with CONFIG_BT_NIMBLE_LOG_LEVEL (see src/nimconfig.h for usage)
  • Config option CONFIG_NIMBLE_CPP_ENABLE_ADVERTISMENT_TYPE_TEXT renamed to CONFIG_NIMBLE_CPP_ENABLE_ADVERTISEMENT_TYPE_TEXT
  • Config option CONFIG_BT_NIMBLE_TASK_STACK_SIZE renamed to CONFIG_BT_NIMBLE_HOST_TASK_STACK_SIZE

Added

  • Preliminary support for non-esp devices, NRF51 and NRF52 devices supported with n-able arduino core
  • Alias added for NimBLEServerCallbacks::onMTUChange to onMtuChanged in order to support porting code from original library.
  • NimBLEAttValue Class added to reduce and control RAM footprint of characteristic/descriptor values and support conversions from Arduino Strings and many other data types.
  • Bluetooth 5 extended advertising support for capable devices. CODED Phy, 2M Phy, extended advertising data, and multi-advertising are supported, periodic advertising will be implemented in the future.

[1.3.8] - 2022-04-27

Fixed

  • Fix compile error with ESP32S3.
  • Prevent a potential crash when retrieving characteristics from a service if the result was successful but no characteristics found.

Changed

  • Save resources when retrieving descriptors if the characteristic handle is the same as the end handle (no descriptors).
  • Subscribing to characteristic notifications/indications will now always use write with response, as per BLE specifications.
  • NimBLEClient::discoverAttributes now returns a bool value to indicate success/failure

[1.3.7] - 2022-02-15

Fixed

  • Crash when retrieving an attribute that does not exist on the peer.
  • Memory leak when deleting client instances.
  • Compilation errors for esp32s3

[1.3.6] - 2022-01-18

Changed

  • When retrieving attributes from a server fails with a 128bit UUID containing the ble base UUID another attempt will be made with the 16bit version of the UUID.

Fixed

  • Memory leak when services are changed on server devices.
  • Rare crashing that occurs when BLE commands are sent from ISR context using IPC.
  • Crashing caused by uninitialized disconnect timer in client.
  • Potential crash due to uninitialized advertising callback pointer.

[1.3.5] - 2022-01-14

Added

  • CONFIG_NIMBLE_CPP_DEBUG_LEVEL macro in nimconfig.h to allow setting the log level separately from the Arduino core log level.

Fixed

  • Memory leak when initializing/deinitializing the BLE stack caused by new FreeRTOS timers be created on each initialization.

[1.3.4] - 2022-01-09

Fixed

  • Workaround for latest Arduino-esp32 core that causes tasks not to block when required, which caused functions to return prematurely resulting in exceptions/crashing.
  • The wrong length value was being used to set the values read from peer attributes. This has been corrected to use the proper value size.

[1.3.3] - 2021-11-24

Fixed

  • Workaround added for FreeRTOS bug that affected timers, causing scan and advertising timer expirations to not correctly trigger callbacks.

[1.3.2] - 2021-11-20

Fixed

  • Added missing macros for scan filter.

Added

  • NimBLEClient::getLastError : Gets the error code of the last function call that produces a return code from the stack.

[1.3.1] - 2021-08-04

Fixed

  • Corrected a compiler/linker error when an application or a library uses bluetooth classic due to the redefinition of btInUse.

[1.3.0] - 2021-08-02

Added

  • NimBLECharacteristic::removeDescriptor: Dynamically remove a descriptor from a characteristic. Takes effect after all connections are closed and sends a service changed indication.

  • NimBLEService::removeCharacteristic: Dynamically remove a characteristic from a service. Takes effect after all connections are closed and sends a service changed indication

  • NimBLEServerCallbacks::onMTUChange: This is callback is called when the MTU is updated after connection with a client.

  • ESP32C3 support

  • Whitelist API:

    • NimBLEDevice::whiteListAdd: Add a device to the whitelist.
    • NimBLEDevice::whiteListRemove: Remove a device from the whitelist.
    • NimBLEDevice::onWhiteList: Check if the device is on the whitelist.
    • NimBLEDevice::getWhiteListCount: Gets the size of the whitelist
    • NimBLEDevice::getWhiteListAddress: Get the address of a device on the whitelist by index value.

  • Bond management API:

    • NimBLEDevice::getNumBonds: Gets the number of bonds stored.
    • NimBLEDevice::isBonded: Checks if the device is bonded.
    • NimBLEDevice::deleteAllBonds: Deletes all bonds.
    • NimBLEDevice::getBondedAddress: Gets the address of a bonded device by the index value.

  • NimBLECharacteristic::getCallbacks to retrieve the current callback handler.

  • Connection Information class: NimBLEConnInfo.

  • NimBLEScan::clearDuplicateCache: This can be used to reset the cache of advertised devices so they will be immediately discovered again.

Changed

  • FreeRTOS files have been removed as they are not used by the library.
  • Services, characteristics and descriptors can now be created statically and added after.
  • Excess logging and some asserts removed.
  • Use ESP_LOGx macros to enable using local log level filtering.

Fixed

  • NimBLECharacteristicCallbacks::onSubscribe Is now called after the connection is added to the vector.
  • Corrected bonding failure when reinitializing the BLE stack.
  • Writing to a characteristic with a std::string value now correctly writes values with null characters.
  • Retrieving remote descriptors now uses the characteristic end handle correctly.
  • Missing data in long writes to remote descriptors.
  • Hanging on task notification when sending an indication from the characteristic callback.
  • BLE controller memory could be released when using Arduino as a component.
  • Compile errors with NimBLE release 1.3.0.

[1.2.0] - 2021-02-08

Added

  • NimBLECharacteristic::getDescriptorByHandle: Return the BLE Descriptor for the given handle.

  • NimBLEDescriptor::getStringValue: Get the value of this descriptor as a string.

  • NimBLEServer::getServiceByHandle: Get a service by its handle.

  • NimBLEService::getCharacteristicByHandle: Get a pointer to the characteristic object with the specified handle.

  • NimBLEService::getCharacteristics: Get the vector containing pointers to each characteristic associated with this service. Overloads to get a vector containing pointers to all the characteristics in a service with the UUID. (supports multiple same UUID's in a service)

    • NimBLEService::getCharacteristics(const char *uuid)
    • NimBLEService::getCharacteristics(const NimBLEUUID &uuid)

  • NimBLEAdvertisementData New methods:

    • NimBLEAdvertisementData::addTxPower: Adds transmission power to the advertisement.
    • NimBLEAdvertisementData::setPreferredParams: Adds connection parameters to the advertisement.
    • NimBLEAdvertisementData::setURI: Adds URI data to the advertisement.

  • NimBLEAdvertising New methods:

    • NimBLEAdvertising::setName: Set the name advertised.
    • NimBLEAdvertising::setManufacturerData: Adds manufacturer data to the advertisement.
    • NimBLEAdvertising::setURI: Adds URI data to the advertisement.
    • NimBLEAdvertising::setServiceData: Adds service data to the advertisement.
    • NimBLEAdvertising::addTxPower: Adds transmission power to the advertisement.
    • NimBLEAdvertising::reset: Stops the current advertising and resets the advertising data to the default values.

  • NimBLEDevice::setScanFilterMode: Set the controller duplicate filter mode for filtering scanned devices.

  • NimBLEDevice::setScanDuplicateCacheSize: Sets the number of advertisements filtered before the cache is reset.

  • NimBLEScan::setMaxResults: This allows for setting a maximum number of advertised devices stored in the results vector.

  • NimBLEAdvertisedDevice New data retrieval methods added:

    • haveAdvInterval/getAdvInterval: checks if the interval is advertised / gets the advertisement interval value.

    • haveConnParams/getMinInterval/getMaxInterval: checks if the parameters are advertised / get min value / get max value.

    • haveURI/getURI: checks if a URI is advertised / gets the URI data.

    • haveTargetAddress/getTargetAddressCount/getTargetAddress(index): checks if a target address is present / gets a count of the addresses targeted / gets the address of the target at index.

Changed

  • nimconfig.h (Arduino) is now easier to use.

  • NimBLEServer::getServiceByUUID Now takes an extra parameter of instanceID to support multiple services with the same UUID.

  • NimBLEService::getCharacteristic Now takes an extra parameter of instanceID to support multiple characteristics with the same UUID.

  • NimBLEAdvertising Transmission power is no longer advertised by default and can be added to the advertisement by calling NimBLEAdvertising::addTxPower

  • NimBLEAdvertising Custom scan response data can now be used without custom advertisement.

  • NimBLEScan Now uses the controller duplicate filter.

  • NimBLEAdvertisedDevice Has been refactored to store the complete advertisement payload and no longer parses the data from each advertisement. Instead the data will be parsed on-demand when the user application asks for specific data.

Fixed

  • NimBLEHIDDevice Characteristics now use encryption, this resolves an issue with communicating with devices requiring encryption for HID devices.

[1.1.0] - 2021-01-20

Added

  • NimBLEDevice::setOwnAddrType added to enable the use of random and random-resolvable addresses, by asukiaaa

  • New examples for securing and authenticating client/server connections, by mblasee.

  • NimBLEAdvertising::SetMinPreferred and NimBLEAdvertising::SetMinPreferred re-added.

  • Conditional checks added for command line config options in nimconfig.h to support custom configuration in platformio.

  • NimBLEClient::setValue Now takes an extra bool parameter response to enable the use of write with response (default = false).

  • NimBLEClient::getCharacteristic(uint16_t handle) Enabling the use of the characteristic handle to be used to find the NimBLERemoteCharacteristic object.

  • NimBLEHIDDevice class added by wakwak-koba.

  • NimBLEServerCallbacks::onDisconnect overloaded callback added to provide a ble_gap_conn_desc parameter for the application to obtain information about the disconnected client.

  • Conditional checks in nimconfig.h for command line defined macros to support platformio config settings.

Changed

  • NimBLEAdvertising::start now returns a bool value to indicate success/failure.

  • Some asserts were removed in NimBLEAdvertising::start and replaced with better return code handling and logging.

  • If a host reset event occurs, scanning and advertising will now only be restarted if their previous duration was indefinite.

  • NimBLERemoteCharacteristic::subscribe and NimBLERemoteCharacteristic::registerForNotify will now set the callback regardless of the existence of the CCCD and return true unless the descriptor write operation failed.

  • Advertising tx power level is now sent in the advertisement packet instead of scan response.

  • NimBLEScan When the scan ends the scan stopped flag is now set before calling the scan complete callback (if used) this allows the starting of a new scan from the callback function.

Fixed

  • Sometimes NimBLEClient::connect would hang on the task block if no event arrived to unblock. A time limit has been added to timeout appropriately.

  • When getting descriptors for a characteristic the end handle of the service was used as a proxy for the characteristic end handle. This would be rejected by some devices and has been changed to use the next characteristic handle as the end when possible.

  • An exception could occur when deleting a client instance if a notification arrived while the attribute vectors were being deleted. A flag has been added to prevent this.

  • An exception could occur after a host reset event when the host re-synced if the tasks that were stopped during the event did not finish processing. A yield has been added after re-syncing to allow tasks to finish before proceeding.

  • Occasionally the controller would fail to send a disconnected event causing the client to indicate it is connected and would be unable to reconnect. A timer has been added to reset the host/controller if it expires.

  • Occasionally the call to start scanning would get stuck in a loop on BLE_HS_EBUSY, this loop has been removed.

  • 16bit and 32bit UUID's in some cases were not discovered or compared correctly if the device advertised them as 16/32bit but resolved them to 128bits. Both are now checked.

  • FreeRTOS compile errors resolved in latest Arduino core and IDF v3.3.

  • Multiple instances of time() called inside critical sections caused sporadic crashes, these have been moved out of critical regions.

  • Advertisement type now correctly set when using non-connectable (advertiser only) mode.

  • Advertising payload length correction, now accounts for appearance.

  • (Arduino) Ensure controller mode is set to BLE Only.

[1.0.2] - 2020-09-13

Changed

  • NimBLEAdvertising::start Now takes 2 optional parameters, the first is the duration to advertise for (in seconds), the second is a callback that is invoked when advertising ends and takes a pointer to a NimBLEAdvertising object (similar to the NimBLEScan::start API).

  • (Arduino) Maximum BLE connections can now be altered by only changing the value of CONFIG_BT_NIMBLE_MAX_CONNECTIONS in nimconfig.h. Any changes to the controller max connection settings in sdkconfig.h will now have no effect when using this library.

  • (Arduino) Revert the previous change to fix the advertising start delay. Instead a replacement fix that routes all BLE controller commands from a task running on core 0 (same as the controller) has been implemented. This improves response times and reliability for all BLE functions.

[1.0.1] - 2020-09-02

Added

  • Empty NimBLEAddress constructor: NimBLEAddress() produces an address of 00:00:00:00:00:00 type 0.
  • Documentation of the difference of NimBLEAddress::getNative vs the original bluedroid library.

Changed

  • notify_callback typedef is now defined as std::function to enable the use of std::bind to call a class member function.

Fixed

  • Fix advertising start delay when first called.

[1.0.0] - 2020-08-22

First stable release.

All the original library functionality is complete and many extras added with full documentation.