esp8266/Arduino 2.4.2

on GitHub

Changes since 2.4.1.

Core

• Correct millis() drift (#3078, #4264)
• Raise exception when assert happens (#4480, #4482)
• Fix stack trace unwinding within continuation library (#4385)
• Return from Print::write(buffer, size) if any byte fails to write (#4527)
• Warn if inefficient Print::write implementation is not overridden (#4537)
• String: fix overlapping memcpy call in String::trim (#4938)
• String: fix creation and concat issues (#4955, #4962)
• Increase available DRAM by moving exception/panic messages into IRAM, assert strings and file names into flash. (#4187)
• Increase available IRAM by moving cont_init from into flash (#4384)
• Save 192 bytes of RAM bytes when attachInterrupt is not used (#4601)
• Move continuation stack from .bss onto sys stack, saving 4kB of RAM, if WPS is not needed (#4622)
• Allow changing vtables location (#4567, #4582)
• Add linker MAP artifact to standard build process (#4186)
• Record information on failed allocation, dump it to UART on a panic (#4220)
• Fix OOM debug support for Arduino 1.9 (#4357)
• HardwareSerial: RX fifo latency fix (#4328)
• HardwareSerial: improve UART FIFO overrun handling and stability (#4536, #4568)
• HardwareSerial: add functions for baud rate detection (#4978)
• Add support for hardware Sigma Delta generator (#4119, #4494)
• New waveform generation code supporting multiple analogWrite, Servo, Tone at the same time (#4640, #4872)
• Scheduled interrupt handler support (#4609, #4879, #4890)
• Allow using GPIO16 for analogWrite (#4895)
• Fix digitalPinToBitMask(), portOutputRegister(), portInputRegister() for GPIO16 (#4964)
• I2S: add callbacks on DMA reads (#4205)
• I2S: multiple fixes for IRQs, protocol, factoring (#4574)
• I2S: add input API and examples (#4539)
• Updater: fix overflow in binary size check (#4552)
• Updater: copy the existing flash mode over the one set in an OTA update image (#4876, #4877)
• Allow sending debug information to classes other than HardwareSerial (#4611)
• Add ESP.deepSleepMax() function to get maximum possible deep sleep time (#4627)
• Add avr/pgmspace.h and handling of __PROG_TYPES_COMPAT__ for compatibility (#4619)
• Force ARDUINO macro to 10805
• Fix base64_encode_expected_len returning value which is not large enough (#4773, #4786, #4934)
• Add extra parens in SDK macro definitions (#2617, #4508)

ESP8266WiFi

• Fix memory leak when reusing WiFiClient object (#4497, #4516, #4549)
• Fix issues around WiFi.persistent handling (#3798)
• Add WiFi.getAutoReconnect() function (#4359)
• Fix random crash in ClientContext::write(Stream) and write_P(PGM_P buf, size_t size) (#2504, #4530)
• Add softAP SSID & PSK query API (#4138)
• Fix WiFiClient not detecting connection reset by peer (#4626)
• Allow scanning on specific channel or for specific SSID (#4636)
• lwip2 Update (#4729)
• lwip2: Fix static address management (#4677)
• lwip2: fix disconnection, fix reconnection (#4851)
• Add new WiFiClientSecure and WiFiServerSecure implementations based on BearSSL, offering lower memory consumption and higher robustness (#4273)
• WiFiClientSecure: report connected when any bytes are available for read (#4754)

Other Libraries

• ESP8266mDNS: support for compressed DNS messages (#3769, #4648, #4752)
• ESP8266mDNS: return bool from addServiceTxt (#4507)
• ESP8266mDNS: clear previous result when queryService() is called (#4893, #4894)
• SPISlave: add end method (#4248)
• ESP8266WebServer: fix WebServerSecure streamFile() (#4545)
• SPI: const-ify input buffers (#4552)
• SPI: Support Arduino API's SPI::transfer(void*, size), optimized (#4925)
• I2C: improve bus recovery procedure (#4070)
• I2C: add support for 50kHz clock (#3401)
• I2C: clock frequency set by setClock now survives re-initialization (#3389)
• Add ESP_EEPROM to list of ESP libraries (#4529)
• SoftwareSerial: update to version to 3.4.1 (#4623)
• ESP8266HTTPUpdate: make timeout configurable (#4705)
• ESP8266HTTPUpdateServer: allow to update credentials after setup is performed (#4789)
• ESP8266SSDP: add setUUID method (#4981)
• ESP8266WiFiMesh: new version (#4718)

Documentation

• Documentation improvements and fixes (#4502, #4503, #4504, #4512, #4532, #4131, #4534, #4621, #4671, #4730, #4753, #4794, #4933, #4949, #4958, #4971)
• Remove reference to an arrow/_right that doesn't exist (#4401)
• Add Windows 10 installation instructions (#4797)
• Improve the compatibility of links between Github and readthedocs (#4800)

Boards

• Support 4M2M board option (#4454)
• Support 512k32k board option (#4871, #4880)
• Define SDA and SCL pins for Olimex MOD-WIFI-ESP8266(-DEV) (#4562)
• Add WiFiduino board (#4590)
• Change flash mode from QIO to DIO for gen4iod board (#4616)
• A0 pin number can be changed in the variants (#4778)
• Add WiFi Slot board (#3916)
• Wemos D1 Mini Lite documentation update (#4809)
• NodeMCU documentation update (#4715)
• Add XinaBox board (#4929)
• Add Seeed Wio Link board (#4943)
• Change "WeMos" to new brand name "LOLIN" (#4984)