Arduino ESP32 Version 2.0.3-RC1

The Arduino ESP32 version 2.0.3 based on the ESP-IDF v4.4 introduces the support for the ESP32-S3, new boards support, new APIs and refactoring, improvements, and bug fixes.

About the ESP32-S3

Announced by Espressif in 2020, the ESP32-S3 is a dual-core XTensa LX7 MCU, capable of running at 240 MHz, 512 KB of internal SRAM, integrated 2.4 GHz, 802.11 b/g/n Wi-Fi and Bluetooth 5 (LE) connectivity, 45 programmable GPIOs and supports a rich set of peripherals.

To know more about the ESP32-S3, see the product page here.

Changes

Here is a summary of the major changes.

New Peripherals Support and Refactoring (ESP-IDF APIs based)

• ESP32-S3 support added
• Added ESP-SR support
• GPIO
• Touch

Improvements

• ESP-IDF release/v4.4
• Toolchain updated to gcc8_4_0-esp-2021r2-patch3
• New boards support was added
• New documentation chapters added
• Added support for the Dual-Antenna and ESP32-WROOM-DA
• RainMaker support for ESP32-S2, ESP32-S3, and ESP32-C3
• Update IDF libs and mbedtls options
• CI improvements
• KSZ8041 support
• Add cookie support on HttpClient
• New documentation chapters and tutorial

Bugfixes

• Fix bootloop issue and enable DSP optimization
• Fixes on UART
• Fix Ethernet clock runtime setting
• Fixes on LEDC
• Fix SD mount issue
• Fixed String(float) issue
• Fixed UART MODBUS and Loopback issue
• Fixed interrupts in LEDC
• Fixed SD mount issue

Known Issues (from ESP-IDF)

Some ESP-IDF known issues may affect the Arduino ESP32 core. For a list of known issues on ESP-IDF, see the Known Issues in v4.4 in the ESP-IDF release notes.

See all bug fixes in the complete changelog below.

What's Changed

See the complete changelog down below:

• Fixes String(float) issue with Stack Smashing by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6138
• Allows user to bypass PSRAM test and boot faster with WROVER by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6135
• Fixes UART MODBUS and Loopback issue by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6133
• Adds UART RX IRQ Callback with onReceive() by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6134
• NTP Examples: revert obsolete comment and updated Time example by @vortigont in https://github.com/espressif/arduino-esp32/pull/6073
• Add variantInit setups for adafruit boards by @ladyada in https://github.com/espressif/arduino-esp32/pull/6076
• Print.flush() - Arduino API conformance by @jandrassy in https://github.com/espressif/arduino-esp32/pull/6084
• Add KSZ8041 support by @Darek7D in https://github.com/espressif/arduino-esp32/pull/6087
• BUGFIX - Sd check status by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6103
• Versions and feature Request Template updates by @VojtechBartoska in https://github.com/espressif/arduino-esp32/pull/6096
• Fix I2C Slave Compile by @mrengineer7777 in https://github.com/espressif/arduino-esp32/pull/6108
• Consistently change device index to singed integer in BluetoothSerial lib by @iltis42 in https://github.com/espressif/arduino-esp32/pull/6109
• WIFI STA AutoReconnect fix for assocfail reason, Proposed fix for #2501 by @tablatronix in https://github.com/espressif/arduino-esp32/pull/6113
• Add Core Debug Level option to Tools menu for all boards in boards.txt by @gcweeks in https://github.com/espressif/arduino-esp32/pull/6110
• ci: Miscellaneous improvements by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6132
• IDF release/v4.4 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6075
• Implement Ticker::active() by @everslick in https://github.com/espressif/arduino-esp32/pull/6148
• Add LionBit Dev Board. by @niwantha33 in https://github.com/espressif/arduino-esp32/pull/6151
• Add certificate bundle capability to WiFiClientSecure by @esp32wrangler in https://github.com/espressif/arduino-esp32/pull/6106
• Rename file pins_Arduino.h to pins_arduino.h by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6153
• Fix variant definition for w32-eth01 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6159
• Fixing interrupts in LEDC by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6160
• Add Watchy board by @sqfmi in https://github.com/espressif/arduino-esp32/pull/6158
• .github/scripts: Fix indentation and trailing spaces. by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6157
• Fixes UART1 and UART2 default pins for ESP32-S3 by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6202
• Fix - SD mount issue by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6162
• [SSL] fix: restoring handshake timeout by @vlastahajek in https://github.com/espressif/arduino-esp32/pull/6166
• Use 8.4.0+2021r2-patch2 toolchains for CI by @Jason2866 in https://github.com/espressif/arduino-esp32/pull/6184
• Fixes onReceive deadlock by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6201
• added explanatory comments to WebServer.h by @h-enes-simsek in https://github.com/espressif/arduino-esp32/pull/6204
• Add conditional include to WiFiProv.h by @mrengineer7777 in https://github.com/espressif/arduino-esp32/pull/6192
• Resolve WString TODO by @mrengineer7777 in https://github.com/espressif/arduino-esp32/pull/6190
• Allow HTTPCLIENT_1_1_COMPATIBLE to be disabled by @everslick in https://github.com/espressif/arduino-esp32/pull/6200
• Update RequestHandlersImpl.h to enable serveStatic on folders with LittleFS. by @mathertel in https://github.com/espressif/arduino-esp32/pull/6179
• Refactor the CI scripts by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6191
• Fix random CaptivePortal.ino crashes by @im-pro-at in https://github.com/espressif/arduino-esp32/pull/6206
• Docs cleanup and version updated to 2.0.2 by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6213
• Unnecessary operation removed from map() in WMath.cpp by @IanSC in https://github.com/espressif/arduino-esp32/pull/6218
• Update of CameraWebServer example by @renebohne in https://github.com/espressif/arduino-esp32/pull/6219
• Touch Sensor IDF Refactoring by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6194
• Fix String.replace() broken by #6190 by @s-hadinger in https://github.com/espressif/arduino-esp32/pull/6224
• Add Github action for uploading arduino-esp32 component. by @magicarm22 in https://github.com/espressif/arduino-esp32/pull/6203
• add feather esp32 v2 and qtpy c3 board def by @ladyada in https://github.com/espressif/arduino-esp32/pull/6223
• Added dual antenna for WiFi (based on the ESP32-WROOM-DA module) by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6226
• Remove pinMode in ledc for ESP32C3 by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6229
• Fixes Touch Sensor for ESP32-S3 and any future SoC by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6234
• HttpClient: Add cookie support (cookie jar) by @mattsches1 in https://github.com/espressif/arduino-esp32/pull/6216
• Support the updated MbedTLS in ESP-IDF v4.4 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6243
• Fix compile with Arduino lib builder by @Jason2866 in https://github.com/espressif/arduino-esp32/pull/6244
• Fix CDC+JTAG is disabled when WiFi is used on ESP32-C3 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6287
• Fix Check for _cookieJar in HTTPClient (#6266) by @bbsan2k in https://github.com/espressif/arduino-esp32/pull/6280
• Installing.rst_update by @VojtechBartoska in https://github.com/espressif/arduino-esp32/pull/6292
• Fixes softAPConfig() return by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6294
• Adds BLE examples to ESP32-C3 CI cycle by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6285
• Add Ethernet to CMakeLists by @copercini in https://github.com/espressif/arduino-esp32/pull/6261
• GPIO refactoring by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6259
• Added documentation for the Arduino IDE tools menu by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6284
• ADC esp32s2 attenuation fix for DAC pins by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6282
• Fixes UART pin setting + adds CTS/RTS HW Flow Control by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6272
• fixed http.end taking too long by @yigitabi5444 in https://github.com/espressif/arduino-esp32/pull/6277
• add lolin c3 mini board def by @wemos in https://github.com/espressif/arduino-esp32/pull/6306
• (boards.txt) Add partition scheme menu for AI Thinker ESP-CAM boards by @HACKER-3000 in https://github.com/espressif/arduino-esp32/pull/6310
• The M5Core2 and M5Tough have 40 pins by @pgrawehr in https://github.com/espressif/arduino-esp32/pull/6315
• add lolin s2 mini board def by @wemos in https://github.com/espressif/arduino-esp32/pull/6320
• Make USBHIDKeyboard::sendReport() public by @tobozo in https://github.com/espressif/arduino-esp32/pull/6322
• Update doc: Arduino as IDF component; fixes #5833 by @PilnyTomas in https://github.com/espressif/arduino-esp32/pull/6299
• Added ADC API doc + simple example by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6301
• [Docs] Added more details about embedded FLASH and PSRAM on ESP32-S3. by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6321
• LEDC & SigmaDelta documentation by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6330
• [Docs] Timer API documentation by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6335
• [Docs] DAC API documentation by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6337
• .github/workflows: Remove the selfhost runner test by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6343
• Add new board (Deneyap Kart 1A) by @zeynepdicle in https://github.com/espressif/arduino-esp32/pull/6324
• add lolin s2 pico board def by @wemos in https://github.com/espressif/arduino-esp32/pull/6325
• Update esp32-hal-log.h by @cyberman54 in https://github.com/espressif/arduino-esp32/pull/6351
• Fix some hardware definition pins by @ladyada in https://github.com/espressif/arduino-esp32/pull/6353
• Fix DNSServer crash by @BlueAndi in https://github.com/espressif/arduino-esp32/pull/6354
• Added more details about PlatformIO by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/5540
• FIX - wifiBegin works every 2nd time when connecting to same AP by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6359
• WiFi DA: Added Dual Antenna to the docs and example created by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6357
• [esp32-hal-log.h] add #ifdef for LOG_LOCAL_LEVEL by @cyberman54 in https://github.com/espressif/arduino-esp32/pull/6358
• Added ESP32-WROOM-DA module to boards.txt by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6361
• FEATURE: Implemented new types of Wifi SmartConfig by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6367
• Fixes DHCP Server Lease Range for any AP Server Static IP Address by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6296
• Adds C++ std::function to Serial.onReceive() by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6364
• log_printf may cause memory leak and unexpected behaviour by @BlueAndi in https://github.com/espressif/arduino-esp32/pull/6360
• Build (using arduino-builder) and run tests by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6313
• Fixes rmtDeinit() and tests RX/TX before operations by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6369
• CameraWebServer duplicate line fix by @VojtechBartoska in https://github.com/espressif/arduino-esp32/pull/6370
• Fix ledc panic’ed when wrong setup of frequency and bit width by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6371
• Fixed the antenna GPIO argument on the DA example by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6392
• Allows setting only one pin (rx or tx) in the first begin() by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6394
• publish.yml: Remove the debug job and fix an error in the workflow. by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6408
• Implemented tone and noTone; fixes #980 by @PilnyTomas in https://github.com/espressif/arduino-esp32/pull/6402
• publish.yml: Limit the running scope of the publish Workflow. by @Ouss4 in https://github.com/espressif/arduino-esp32/pull/6428
• Add missing include in AsyncUDP.h by @mrengineer7777 in https://github.com/espressif/arduino-esp32/pull/6412
• Some board variant fixes by @ladyada in https://github.com/espressif/arduino-esp32/pull/6411
• Added another overloaded WiFiSTAClass::begin() function that provides… by @jpswensen in https://github.com/espressif/arduino-esp32/pull/6398
• [Docs] Added the guideline for documentation by @pedrominatel in https://github.com/espressif/arduino-esp32/pull/6409
• Fix boot freeze when trying to init PSRAM on Pico D4 by @s-hadinger in https://github.com/espressif/arduino-esp32/pull/6434
• Adds HardwareSerial::setTxBufferSize() by @gonzabrusco in https://github.com/espressif/arduino-esp32/pull/6383
• Fixes USB CDC setRxBufferSize(), begin(), _onRX() by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6413
• Change "python" to "python3" by @tomorrow56 in https://github.com/espressif/arduino-esp32/pull/6448
• Warns about SPP only available for ESP32 by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6455
• Edited VFSFileImpl::read to use both read/fread by @P-R-O-C-H-Y in https://github.com/espressif/arduino-esp32/pull/6456
• Adding sectorsize() and numSectors() to SD by @tobozo in https://github.com/espressif/arduino-esp32/pull/6457
• (boards.txt) Add partition scheme menu for WeMos WiFi&Bluetooth Battery by @garubi in https://github.com/espressif/arduino-esp32/pull/6479
• Add Preferences library API and tutorial documents by @Xylopyrographer in https://github.com/espressif/arduino-esp32/pull/6442
• Esp32 s3 support by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6341
• add variant init code for the feather s2 tft by @ladyada in https://github.com/espressif/arduino-esp32/pull/6447
• Adds HardwareSerial::setRxTimeout() by @gonzabrusco in https://github.com/espressif/arduino-esp32/pull/6397
• Fix linking failure for space in path in PlatformIO builder scripts by @maxgerhardt in https://github.com/espressif/arduino-esp32/pull/6464
• Add S3 in Headline by @Jason2866 in https://github.com/espressif/arduino-esp32/pull/6491
• Reordering - HardwareSerial Constructor by @SuGlider in https://github.com/espressif/arduino-esp32/pull/6492
• IDF release/v4.4 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6493
• Fix Reading MAC from efuse for ESP32 Arduino 2.x.x by @smuellener in https://github.com/espressif/arduino-esp32/pull/6459
• Update toolchain to gcc8_4_0-esp-2021r2-patch3 by @me-no-dev in https://github.com/espressif/arduino-esp32/pull/6497

New Contributors

A special thank you to all new contributors!

• @jandrassy made their first contribution in https://github.com/espressif/arduino-esp32/pull/6084
• @Darek7D made their first contribution in https://github.com/espressif/arduino-esp32/pull/6087
• @mrengineer7777 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6108
• @iltis42 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6109
• @gcweeks made their first contribution in https://github.com/espressif/arduino-esp32/pull/6110
• @niwantha33 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6151
• @esp32wrangler made their first contribution in https://github.com/espressif/arduino-esp32/pull/6106
• @sqfmi made their first contribution in https://github.com/espressif/arduino-esp32/pull/6158
• @h-enes-simsek made their first contribution in https://github.com/espressif/arduino-esp32/pull/6204
• @mathertel made their first contribution in https://github.com/espressif/arduino-esp32/pull/6179
• @im-pro-at made their first contribution in https://github.com/espressif/arduino-esp32/pull/6206
• @IanSC made their first contribution in https://github.com/espressif/arduino-esp32/pull/6218
• @renebohne made their first contribution in https://github.com/espressif/arduino-esp32/pull/6219
• @s-hadinger made their first contribution in https://github.com/espressif/arduino-esp32/pull/6224
• @magicarm22 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6203
• @mattsches1 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6216
• @bbsan2k made their first contribution in https://github.com/espressif/arduino-esp32/pull/6280
• @yigitabi5444 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6277
• @pgrawehr made their first contribution in https://github.com/espressif/arduino-esp32/pull/6315
• @BlueAndi made their first contribution in https://github.com/espressif/arduino-esp32/pull/6354
• @jpswensen made their first contribution in https://github.com/espressif/arduino-esp32/pull/6398
• @gonzabrusco made their first contribution in https://github.com/espressif/arduino-esp32/pull/6383
• @tomorrow56 made their first contribution in https://github.com/espressif/arduino-esp32/pull/6448
• @garubi made their first contribution in https://github.com/espressif/arduino-esp32/pull/6479
• @Xylopyrographer made their first contribution in https://github.com/espressif/arduino-esp32/pull/6442
• @smuellener made their first contribution in https://github.com/espressif/arduino-esp32/pull/6459

Full Changelog: https://github.com/espressif/arduino-esp32/compare/2.0.2...2.0.3-RC1

To see how to contribute to the Arduino ESP32 project, see this reference: Contributing