esp8266/Arduino

View on GitHub

ESP8266 core for Arduino

Stars: 16.7k
Forks: 13.1k
Open beginner issues: 0
Indexed issues: 328

Dominant language: C++
License: LGPL-2.1
Last GitHub push: Aug 27, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Open All

328 open issues indexed

Feature Request... Synchronize the WiFi (And WiFiMulti) APIs between ESP 8266 and ESP 32 Open

esp8266/Arduino#5911 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ESP8266 Very Slow TCP Socket Transfer Speed Open

esp8266/Arduino#5918 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Hspi in slave mode miss interrupt when WIFI is enabled Open

help wanted

esp8266/Arduino#5921 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Creating IPv6 only network Open

esp8266/Arduino#5923 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[REQUEST] WiFiMulti with BSSID... Open

waiting for feedback

esp8266/Arduino#5940 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Client not reconnecting to AP (AP ISSUE) Open

esp8266/Arduino#5950 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ESP8266 softAP webserver with GPS is not working. Open

esp8266/Arduino#5970 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Static DHCP Lease not working Open

waiting for feedback

esp8266/Arduino#6031 · 19 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
eraseConfig() causes crashes Open

esp8266/Arduino#6063 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
mDNS responder kills DHCP server on lwip v2 Open

component: MDNS component: network type: bug

esp8266/Arduino#6114 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
mDNS library does not send IPv6 packets and does not provide AAAA records Open

component: MDNS

esp8266/Arduino#6135 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add a non-breaking extension to the OTA protocol for getting rid of UDP Open

component: OTA help wanted type: enhancement

esp8266/Arduino#6369 · 3 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Exception(28) getting WIFi.status() Open

esp8266/Arduino#6385 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
TCP long delay before re-transmission Open

esp8266/Arduino#6400 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
SPIClass::transfer(void *buf, uint16_t count) transfers with wrong block structure Open

esp8266/Arduino#6417 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
refactor SPI class Open

esp8266/Arduino#6425 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Documentation request: Ticker, attach_ms and attach_ms_scheduled Open

component: documentation component: examples

esp8266/Arduino#6451 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
HTTP_UPDATE_FAILD Error Open

esp8266/Arduino#6469 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ets_printf may not be safe for ISR debug printing Open

component: documentation

esp8266/Arduino#6529 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Exception (0) in SoftAP when SPIslave used Open

esp8266/Arduino#6564 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WiFi.setOutputPower setting ignored after some time Open

esp8266/Arduino#6620 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[HELP] Where can I find the definition of the WiFI autoReconnect interval? Open

esp8266/Arduino#6622 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WiFiClient cannot connect to IPv6 link local address Open

esp8266/Arduino#6626 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Investigate breaking the max sketch size limit Open

help wanted

esp8266/Arduino#6681 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WiFiClient.connected() returns false while data are still available in receive buffer Open

esp8266/Arduino#6701 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
esp8266 softap waiting all the time Open

esp8266/Arduino#6705 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Request: Add success/fail flag for webserver parse arguments Open

esp8266/Arduino#6884 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
getString() timeouts when the response is empty (return code 204) Open

esp8266/Arduino#6919 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
HTTP_UPDATE_FAILD Error (-104): Wrong HTTP Code Open

esp8266/Arduino#6971 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
DHCPDISCOVER every 5 minutes, ignores server lease time Open

esp8266/Arduino#7020 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing Documentation for ESP8266HTTPClient Open

component: documentation type: enhancement

esp8266/Arduino#7045 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement low power mode api Open

component: core component: examples help wanted type: enhancement

esp8266/Arduino#7055 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ESP8266 triggers ICMP Flood DoS on router (was New router from ISP and now no ESP8266 modules will connect) Open

esp8266/Arduino#7160 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ESP8266WiFiMesh.h private typedefs prevent new'ing object Open

esp8266/Arduino#7171 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Error(-11): read Timeout for long JSON in POST requests Open

waiting for feedback

esp8266/Arduino#7246 · 7 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
ESP8266 esp-12 tcp server disconnect from client Open

esp8266/Arduino#7274 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Setting timezone with setenv doesn't work properly any more with V 2.7.1 Open

esp8266/Arduino#7353 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
noTone() does not release timer1 Open

esp8266/Arduino#7364 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Large stack usage in core and MDNS libraries Open

component: core component: MDNS type: code cleanup

esp8266/Arduino#7398 · 6 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
mdns responder stops responding Open

component: MDNS

esp8266/Arduino#7448 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ESP8266WebServer HTTPUpload does not support non-file fields Open

esp8266/Arduino#7533 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
debug option provided by gcc10: -fanalyzer Open

esp8266/Arduino#7561 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Additional tweaks to NetDump #7527 Open

type: code cleanup type: enhancement

esp8266/Arduino#7564 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
If Station was connected to an AP that offered 2 DNS via dhcps and then connects to another AP that only offers 1 DNS, WiFi.dnsIP(1) keeps reporting the second DNS from the previous connection. Open

component: core component: network type: bug

esp8266/Arduino#7568 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Update of NONOS_SDK to 3.0.4+ Open

esp8266/Arduino#7575 · 6 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
OTA Web server documentation is invalid Open

esp8266/Arduino#7592 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
HNAP calls on dhcp-server in AP mode causes an exception Open

component: network help wanted type: bug

esp8266/Arduino#7601 · 35 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Separate flash write API into raw and quirk-handling versions Open

esp8266/Arduino#7644 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
PPP packets from Serial on interrupt basis Open

esp8266/Arduino#7646 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Should schedule_function() call esp_schedule()? Open

esp8266/Arduino#7661 · 31 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

esp8266/Arduino

Get new issues in your inbox