Issues

• lwip2 time-wait.patch: TCP_TW_LIMIT can abort the pcb that tcp_process() is still handling -> double free, heap corruption

  esp8266/Arduino#9327 · Filter by author scardus opened on Sep 27, 2026
  2

• 3.1.2: Possible regression with WiFi-connection after ESP.deepSleep( , RF_DISABLED)

  esp8266/Arduino#9324 · Filter by author tlgalaska8 opened on Aug 27, 2026
  2

• ESP-NOW encrypt with ESP32 peer (Arduino 3.x): silent no-recv on SoftAP ESP8266

  esp8266/Arduino#9322 · Filter by author tmdrake opened on Aug 1, 2026

• [compiler Warnings]: Compile with -Wconversion and -Wsign-conversion brings up many Warnings

  esp8266/Arduino#9318 · Filter by author hasenradball opened on May 31, 2026
  5

• esp8266 smartconfig V2.5.4 Unable to connect to the distribution network with esptouch app

  esp8266/Arduino#9317 · Filter by author small-zz opened on Apr 16, 2026
  1

• [request] add weak attribute in all dummy callback functions

  esp8266/Arduino#9315 · Filter by author atesin opened on Apr 6, 2026
  2

• Typo in Scan Class Documentation

  esp8266/Arduino#9303 · Filter by author Notenlish opened on Jan 9, 2026

• ESP07-S and ESP12-S modules don't wake from DeepSleep

  esp8266/Arduino#9301 · Filter by author hasenradball opened on Dec 20, 2025
  1

• "LWIP_NO_CTYPE_H" redefined

  esp8266/Arduino#9294 · Filter by author MrToM528 opened on Nov 18, 2025
  1

• Feature Request: Refactor SPI to allow alternative implementations (e.g., Software SPI)

  esp8266/Arduino#9293 · Filter by author loplex opened on Nov 18, 2025

• ESP8266HTTPClient does not communicate with ESP8266WebServer

  esp8266/Arduino#9292 · Filter by author vadimchip opened on Nov 3, 2025

• In WString.cpp some of the methods access the insecure version of strcmp and strcnmp

  esp8266/Arduino#9269 · Filter by author gorlov-ai opened on Aug 19, 2025
  4

• Webserver serving very slowly when accessed via softAP but fine via normal route

  esp8266/Arduino#9260 · Filter by author bucklevision opened on Jul 10, 2025
  1

• Please add support for the OCTOPUS from Fab-Lab.eu to the boards.txt which is based on the ESP-12F

  esp8266/Arduino#9229 · Filter by author serialrf433 opened on Feb 9, 2025

• Lack of proper cleanup in ArduinoOTA class (missing end() in ~ArduinoOTA)

  esp8266/Arduino#9228 · Filter by author cziter15 opened on Feb 4, 2025
  2

• Compilation error - python3.exe: The parameter is incorrect

  esp8266/Arduino#9217 · Filter by author Total-Reality opened on Jan 10, 2025
  2

• Empty destructor in WifiServer::~WiFiServer()

  esp8266/Arduino#9212 · Filter by author rogueeve575 opened on Dec 9, 2024

• Node CMU 8266 Not running setup or loop after Deep Sleep

  esp8266/Arduino#9204 · Filter by author Aggroid opened on Nov 3, 2024

• Example sketch TickerParameter.ino implementation doesn't match its comments

  esp8266/Arduino#9203 · Filter by author Astro-Johnny opened on Oct 31, 2024
  1

• ESP8266HTTPClient sets Content-Length even on empty GET-requests

  esp8266/Arduino#9200 · Filter by author dakhnod opened on Oct 16, 2024
  1

• Feature Request: Don't print stack trace to Serial on crash

  esp8266/Arduino#9194 · Filter by author DRSDavidSoft opened on Aug 28, 2024
  3

• Missing eagle.flash.16m.ld

  component: tools
  esp8266/Arduino#9187 · Filter by author jwrw opened on Aug 1, 2024
  1

• SoftAP appears to default to TKIP.

  esp8266/Arduino#9164 · Filter by author Frostie314159 opened on Jul 13, 2024
  2

• Releasing Updates

  esp8266/Arduino#9161 · Filter by author ayushsharma82 opened on Jul 9, 2024
  7

• ESP8266 NodeMCU SD Card Not Initializing

  esp8266/Arduino#9156 · Filter by author jcrosby10 opened on Jun 20, 2024
  2