Summary of Major Changes and New Features Added

• Support for ESP32-S2.
• Support for ESP32-C3.
• Upload over CDC.
• Support for the KSZ8081 (Ethernet PHY).
• LittleFS update for partition label and multiple partitions.
• Added support for RainMaker.
• BLE5 features for ESP32-C3 (ESP32-S3 ready).
• ESPTOOL update.
• Added FTM support.
• Online Documentation added. See here.
• USB MSC and HID support (ESP32-S2 only).
• UART refactoring (SerialHardware).
• New examples.
• Boards added.
• Bugs fixed.

For more details check the list of Commits below.

Commits

• 44c11981 Added UM FeatherS2 Neo to boards.txt and added appropriate variants. (#5615)
• 9eea85f9 Check if m_pServerCallbacks is not null before calling method. (#5603)
• 24b76cbb Add string constructor and concat routines taking explicit length args (#5586)
• 4a55ff97 Add support for the hardware CDC in ESP32-C3 (#5614)
• a62979d8 Add missing upload.flags (#5589)
• 1f59c5ab Adds HardwareSerial::setRxBufferSize() (#5583)
• 0730e0ec Include nvs_commit() on three methods (#5309)
• c45cff5f Implement USB HID Device Support for ESP32-S2 (#5538)
• b1d072df Implements UART SerialHardware Refactoring on top of IDF (#5549)
• 929cf2c2 Add ATMegaZero ESP32-S2 microcontroller (#5569)
• 87853353 Add SparkFun ESP32 MicroMod microcontroller (#5556)
• e265bd0d Add new board (Deneyap Mini) (#5531)
• 94809ce3 fix: timerRead() is returning the last read value, not the actual #3434 (#5498)
• 29455a04 Fix issue #5507 "Constructor WebServer::WebServer(IPAddress addr, int… (#5509)
• 78499c45 Added Franzininho WiFi board support (#5570)
• ce680708 Fixed the external link to a new tab (LOLIN boards) (#5571)
• 90c01dab Fix build error in ESP-IDF
• 000d967d Merge pull request #5547 from pedrominatel/docs/wemos_boards
• 44dd99f5 Merge branch 'master' into docs/wemos_boards
• b580bb23 Add log_buf to pretty print buffers
• a7ea737f Added LOLIN boards o the boards list.
• 2af8cc34 Fixes Touchpad Interrupt (#5527)
• e5bd18d6 Fix I2C Scan for S2 and C3 (#5528)
• a4118ea8 Add ET-Board BUILTIN_LED pin (#5490)
• c4fcab28 Fix issue #5506 "WebServer serveStatic () can cause LoadProhibited exception in _svfprintf_r" (#5508)
• 0acbe781 Increase default timeout for WiFiClient from 3ms to 3s (#5496)
• 0b0dfab3 Fix race in log_printf (#5523)
• 5fd73792 Fix wrong attenuation being set to pins (#5522)
• 5bb8177a Add initial support for USB MSC (#5466)
• be84c821 [WiFiClient] Default connection timeout, when no timeout provided (#5487)
• 31127f42 Support for Transfer-Encoding headers that specify "identify" (#5486)
• 4365a454 Fix WiFi Deinit bug
• 023ae75b Rework pulseIn to work on ESP32-C3
• c5a1f3ef Corrected CLASSIC_BT_ENABLED to CONFIG_BT_CLASSIC_ENABLED. (#5471)
• 9406f8e4 Weaken tinyusb callbacks (#5475)
• 65eafd16 Fixes ESP32-S2 LEDC PWM #5375 #5050 (#5452)
• d5a98f9a Doc: Updated Troubleshooting file (#5430)
• 3780b5c9 Unbreak integer to string conversion functions. (#5423) (#5438)
• 1775dd1f Add ReadTheDocs CI (#5456)
• 6972695d IDF master c69f0ec32 (#5449)
• e0e5c886 Create PULL_REQUEST_TEMPLATE.md (#5439)
• 6e47e18a Add files via upload (#5433)
• 34125cee Examples update, add a note for configTime() that only one ntp server is supported by lwip (#5343)
• ee247360 Update README.md
• 5458df0a Fixes Serial.end() hanging on ESP32-S2 (#5434)
• e12d8c8f fix: WiFiClientSecure connection timeout (#5398) (#5418)
• 4ada3f58 Fix Windows USB issues
• 268595c7 Various USB fixes (#5422)
• 4a0305a0 Fixes SD begin() end() memory leak #2897 (#5419)
• 6393dbc9 Fix gh-pages update script
• 49df8778 Merge pull request #5417 from pedrominatel/docs/readme_docs_update
• f79411f3 Links to the new docs updated and new docs build badge added
• db4e7667 add callback to HTTPUpdate (#5408)
• f64ca2e0 Fixed typo in comments. (#5407)
• 1effae46 Docs: Initial documentation structure using Sphinx (#5355)
• d9833f9b Remove mkfatfs tool from package json
• 0aafa05e Added function to retrieve the amount of data received from an BLECharacteristic (#5339)
• 16f4b0f5 IDF master d93887f9f (#5336)
• 780588dc Remove undocumented and uncontrollable WiFI RSSI filter. (#5393)
• eac8b2de fix port{Input,Output,Mode}Register macros for chips with <=32 pins (#5402)
• a9bd39de Fix pin attenuation being overwritten (#5399)
• 5eda2781 Update camera example (#5397)
• c8a4010f Rename LITTLEFS to LittleFS to match ESP8266 (#5396)
• dd25e2b9 Fix some WiFi issues (#5395)
• cf6ab9c8 component: Remove circular dependency around 'main' (#5391)
• 676f5cfe fix UART FIFO test for being full (#5390)
• f4f1c895 pinMatrixInDetach() has wrong parameter (#5385)
• cbcba53d Improve error message when ADC2 can not be used because WiFi is On
• c37557c7 Update .gitignore (#5323)
• 8f46bade Fix hardware timers
• 21947ebe Make String::concat() faster for some types. (#5307)
• c7bdb234 Update stale.yml (#5299)
• cf43d174 Add FTM support and examples (#5272)
• b1bcec08 Update boards_manager.md (#5296)
• 46d888eb Fix #5293 by adding missing dependency to nghttp (#5294)
• 1f4f2b6e Enable clock output for Ethernet RMII on ESP32 (#5274)
• ea236e28 Fix incorrect Flash Size in Esp32c3 (#5279)
• 5ae3e836 Fix wrong password same SSID (#5124)
• eca328e5 Add support for build_opt.h in the sketch folder to use additional global build options (#5237)
• 5b5cbb49 Fix softap_config_equal compare auth_mode/cipher #5115 (#5121)
• aec2635b WifiAP disable insecure TKIP (#5122)
• e7e94ea2 Enable I2C_BUFFER_LENGTH definition for Wire lib (#5172)
• b5ee7dde Convert hall read to use hal/idf (#5268)
• 10602939 Added support for Trueverit ESP32 Universal IoT Driver MK II (#5269)
• 23820874 Added the README template for examples and libraries (#5228)
• 4f9e583b IDF master 1d7068e4b (#5257)
• 7f87d0fc Fix compilation for use as IDF component (#5265)
• 90fc68d8 doitESPduino32 - Add definitions for SPI pins names (#5248)
• 4f8e5b54 Add new board (Deneyap Kart) (#5236)
• 483a424d restore apache-2.0 licence to to BLE library (#5261)
• e7d0ad2e Update BLEScan.cpp (#5241)
• 77f50445 WMath.cpp doesn't include Arduino.h, where makeWord(h, l) is declared, common denominator type therefore is uint8_t, which is in use already in Arduino.h, too. (#5230)
• 67de199b add onMtuChanged to BLEServerCallbacks (#5222)
• 39155e70 ssl_client.cpp: Fix parameter name in _handle_error. (#5217)
• f385ee42 Fixed labels on the boards pinouts images (#5213)
• e30b821b Add missing Wifi Provisioning dependency (#5203)
• cb7aef1e Fix crash in WiFiClient when read() called after stop() (#5197)
• fb513c79 Add uPesy ESP32 DevKit boards support (#5144)
• 90d3ae25 Added support for Trueverit Universal IoT Driver (#5219)
• a618fc13 IDF master c13afea63 (#5214)
• 0db9e2f4 Update esptool
• a1d8b959 Fix length typo (#5189)
• de66c39f Bump library versions to 2.0.0 (#5182)
• 1b5696a5 Bug fix for Heltec boards defintion (#5180)
• 955675e7 Adding build.mcu to save name killed export. reverting. fixes #5174 (#5177)
• 2082945d Make LOOP_STACK_SIZE user configurable at compile-time. (#5173)
• 0d6b1422 Update BLE_client.ino (#5156)
• 7c3a82a5 Fix (en|dis)able typo on BLEAdvertising start() (#5142)
• dadc1015 Add files via upload - CONTRIBUTING.rst (#5138)
• 1b2f34b0 MDNSResponder: Add method to get TXT key values. (#5135)
• 76f0a80f Removed second NTP server from configTime. SNTP only uses one (#5127)
• 5bfbcfc9 Added condition to only use tinyusb as needed (#5123)
• 7a53c2d3 softAP should only start modern WPA2 (#5114)
• cb2fbe44 Added new boads pinout images for ESP32, ESP32-S2 and ESP32-C3 (#5133)
• 48becf89 Update boards.txt (#5113)
• 15f88538 RMaker_readme: Minor corrections (#5175)
• 7856de7a BLE5 features to use with C3/S3 (#5085)
• e62ff6dc RainMaker library: Minor changes (#5092)
• 18249907 Still finding missing bits for the tinys2 board definition :( (#5098)
• cdd48e4e Re-add TinyS2 to boards.txt (#5093)
• 0c3597f8 readme: minor fixes around chip names (#5097)
• 82161beb Use cpu_hal_get_cycle_count for all chips
• 55b8f67d In esp32-hal-log, direct calls to ESP_LOG_x macros is more efficient than using intermediate function log_to_esp (#5081)
• 9c20f1bd added denky boards (#5079)
• b45cf11f Fixed ESP::getCycleCount for S2/C3 (#5075)
• fb0d63b5 Update README.md
• 5d9b98c9 IDF master cf457d412 (#5073)
• 11f89cdd WiFiClientSecure fix flipped cert/key in comment (#5065)
• 01c8cae0 Added method to change the ledc PWM frequency programmatically (#5003)
• 57cf2fb9 Fix possible string overflow in BTAdvertisedDeviceSet::toString()
• 41c372c1 [2.0.0] BtClassic Discovery with info without connect (#4811)
• 223acb35 C3 toolchain uses github as source
• f6c9faf4 [2.0.0] FS::name() returns the item name as in Arduino SD (#4892)
• 89e7893b [2.0.0] Add BLE characteristic callbacks overloads (#4832)
• 7a4e7066 Add setMTU function to BLEClient.cpp/.h (#4999)
• f3dca15a Fix TTGO Boards missing upload parameters,add Twatch revision (#5063)
• 9f1330c7 esp32s2 temp sensor (#5044)
• ec7aeb49 Removed ProS2 and added TinyS2 to boards.txt (#5037)
• 9a518cd3 LITTLEFS update - partition label and multiple partitions, idea copied from SPIFFS (#5023)
• 81b7c472 Serial::end hang (#5047)
• e6ba8c7a Add KSZ8081 support. (#5061)
• 72eb3f32 Add Adafruit esp32s2 boards with custom bootloader, partition and upload.extra_flags (#5056)
• 66b11ff2 Update platformio-build-esp32c3.py
• 404a31f4 Initial Esp32c3 Support (#5060)
• 371f382d Fix Serial RX and add option for FIFO Full Threshold in Serial.begin
• 425619df Fix upload over USB CDC (USB serial must be set to 0)
• aeb4a13a ESP32S2 pinmap (#5015)
• 86459719 Fix delayMicroseconds() to use 64bit period
• 5502879a v2.0.0 Add support for ESP32S2 and update ESP-IDF to 4.4 (#4996)