Spresense Arduino Release Notes

LTE function is available from this version. This function is limited in Japan.

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[LTE] Add LTE Library

[Audio] Digital microphone can be selected from Object I/F layer

[Camera] Add JPEG as a pixel format for camera preview

[SD Card] Fixed the problem that the SD card was not mounted when insert and remove the SD card quickly.

[Tools] Fixed the problem that the bootloader installation dialog was not displayed correctly in Ubuntu 18.04.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

Feature enhancements is available

[Camera] Add Auto White Balance mode.

[Audio] Reduced the boot time of DSP Codec binary in SPI-Flash.

[Core] Improved string conversion accuracy of floating point.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Feature improvement is available

[GNSS] Add API getDCReport() to get QZSS Disaster and Crisis Management (DC Report) sentence.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Feature improvement is available

[Camera Image] Image converter methods of CamImage can be used without Camera Video Stream.

[Tool] When "Export compiled Binary" is selected in the ArduinoIDE menu, the name of the selected sub-core is added to the binary file name.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Feature improvement is available.

[GNSS] Improve GNSS sensitivity when SD card is inserted(without accessed).

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Support multi-core programming environment.
Please refer to Spresense Arduino multi-core environment for more details of it.

New features and feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[MultiCore MP] Add a "MultiCore MP" library to communicate between 6 CPU cores.

[LowPower] Add power saving API to select the system clock (156 MHz / 32 MHz / 8 MHz) dynamically.

[Flash] Add a library for reading and writing from/to SPI-Flash.

[eMMC] Add a library for reading and writing from/to eMMC.

[Sensing] Add Sensor Framework with Publish-Subscribe Architecture.

[Basic] Improve the accuracy of the delay and delayMicroseconds.

[SD] Improve the access performance of the SD card.

[Build] Changed to C++11 compilation.

[MultiCore MP] Added multi-core sample sketches.

[Sensing] Add a sample sketch of a step counter.

[Flash] Add a sample to read and write.

[eMMC] Add a sample to read and write.

[Wire] Add a I2C port scan sketch.

[LowPower] Add a sample sketch to change clock mode.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

New features and feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[Audio] Add API for selecting Analog mic or Digital mic in runtime.

[Audio] Add API to be able to change internal buffer size for audio player and recorder.

[Audio] Add function which can path the audio data from I2S to speaker with low-latency (Audio through).

[GNSS] Improve stability when starting positioning by using hot start.

[SPI] Improve transfer performance by using deprecated API setClockDivider.

[Audio] Add "player_playlist" sample sketch that is reading playlist for playing music.

[Audio] Add "through" sample sketch that is using audio through function.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

New features and feature enhancements are available.

This release has a new DSP binary and bootloader which have to be loaded before use.

[Arduino IDE] Add "--gc-sections" to compile options for reducing memory usage.

[RTC] Add Real Time Clock library to manage RTC time.

[Watchdog] Add Watchdog library to monitor your system.

[LowPower] Add LowPower library to save power like a sleep mode.

[Arduino IDE] Support a partial update when Spresense Arduino Library is updated.

[Arduino IDE] Improve the progress bar when uploading your sketch

[Wire] Support the sendStop flag for enabling continuous transmission by using functions of endTransmission() and requestFrom().

[Audio] Add "player_wav" sample sketch that is able to play wav files with tag information.

[Audio] Add "recorder_with_rendering" sample sketch that is able to monitor sounds while recording.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

New features and feature enhancements are available.

[ArduinoIDE] Support "Export compiled Binary".

[Audio] Support I2S output with Object Level API.

[EEPROM] Improve Read/Write speed.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Fixed problem about DNNRT.

[DNNRT] Fixed continuous recognition processes problem.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

New features and feature enhancements are available.

[Audio] Support 192kHz/48kHz sampling, 24bit wav recording
Supported format:

[Audio] Support selectable API for audio analog drive power for AC-out or speaker-out.

[Camera] Support auto exposure.

[Audio] Update recording sample sketches(pcm_capture/pcm_capture_objif/recorder/recorder_objif/recorder_wav/recorder_wav_objif/rec_play)

[Other] Add new API for change PWM frequency in Wire library.

[Audio] Add Mic-In to AC-out sample sketch(voice_effector).

[Audio] If overflow occurs in the load situation, recording may not be continued in 24 bit recording with next log message. In this case, please reset the board.

WARNING: Insufficient buup_assert: Assertion failed at file:components/capture/capture_component.cpp line: 228 task: CAPTURE_CMP_DEV0

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

New features and feature enhancements are available.

This release has a new DSP binary and bootloader which have to be loaded before use.

[Camera] Capturing of uncompressed and JPEG compressed image data by using ISX012 camera module.

[DNNRT] Deep Neural Network runtime library added.

[GNSS] Japanese GNSS satellite QZSS Michibiki: L1C/A complementation signal and L1S augmentation signal are now supported.

[Audio] Supports 88.2/96/176.4kHz, 24bit wav decoding.

[Audio] Support microphone gain.

[Audio] Support detail logs while debug funciton is enabled(Debug: Enable).

[Other] PWM pins number 3, 5, 6, 9 are changed to stay high just after startup.

[Other] Source code using __FlashStringHelper can be compiled.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others.

Please update Spresense bootloader in Arduino IDE.

Some audio advanced features are released.

Support monaural sound playback in wav format file

Support I2S out put for sound player

Add some audio sample sketches

The recorded wav format file can be saved correctly on Arduino environment.

Please refer to Spresense Arduino Library Getting Started Guide for the first time.

Please update Spresense Arduino package via Boards Manager in Arduino IDE for others