Basic Infos

• This issue complies with theissue POLICY doc.
• I have read the documentation atreadthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware:ESP8266 node MCU V3
• Core Version:2.7.2
• Development Env:Platformio
• Operating System:Windows

Settings in IDE

• Module: nodemcuv2
• Flash Mode:[qio|dio|other]
• Flash Size: 4MB
• Flash Frequency: 40Mhz
• CPU Frequency:[80Mhz
• Upload Using:SERIAL]
• Upload Speed: 115200

Problem Description

When I run WIFI in soft AP mode I can't connect to my board using DHCP. I've tried from different devices both Windows PC and Android phones failed during obtaining IP address. When I assign static IP everything works fine. I've checked network communication using Wireshark and DHCP offer message wasn't send from ESP. When I enabled debug I see following errors:
ERROR: send_offer (error -13)
ERROR: dhcps send ack (error -13)

I've tried different devices and play with a lot of different settings like: WiFi.setSleepMode. IP configuration, dhcps_offer_option, WiFi.mode but without success. I've also check a lot of similar issues (one with mDNS, too short password etc) but none of them fix mine. I will be really glad if somebody give me some advice.

MCVE Sketch

#include<Arduino.h>#include<ESP8266WiFi.h>#include<ESPAsyncTCP.h>#include<ESPAsyncWebServer.h>#include<AsyncJson.h>#include<ArduinoJson.h>#include<DHT.h>#include<LittleFS.h>extern"C" {  #include"user_interface.h"}voidsetup() {     Serial.begin(115200);     Serial.setDebugOutput(true);     WiFi.setSleepMode(WIFI_NONE_SLEEP);     WiFi.disconnect(true);     WiFi.mode(WIFI_AP);     uint8 mode =1;wifi_softap_set_dhcps_offer_option(OFFER_ROUTER, &mode);     WiFi.softAP(systemConfig.wifiName, systemConfig.wifiPassword,9);delay(500);//wait for SYSTEM_EVENT_AP_START     WiFi.softAPConfig(IPAddress{10,0,0,1}, IPAddress{10,0,0,1}, IPAddress{255,255,255,0});     Serial.println("Connected:");     Serial.println(WiFi.softAPIP());          Serial.println("DHCP status:");     Serial.println(wifi_softap_dhcps_status());//starting web server etc}voidloop() {//basic reading sensor operation nothing heavy}

Debug Messages

SDK:2.2.2-dev(38a443e)/Core:2.7.2=20702000/lwIP:STABLE-2_1_2_RELEASE/glue:1.2-30-g92add50/BearSSL:5c771be
sleep disable
[AP] softap config unchanged
[APConfig] local_ip: 10.0.0.1 gateway: 10.0.0.1 subnet: 255.255.255.0
[APConfig] DHCP IP start: 10.0.0.100
[APConfig] DHCP IP end: 10.0.0.200
Connected:
10.0.0.1
DHCP status:
1
wifi evt: 7
aid 1
station: 28:b2:bd:cf:c0:f1 join, AID = 1
wifi evt: 5
ERROR: send_offer (error -13)
wifi evt: 7
....
wifi evt: 7
wifi evt: 9
wifi evt: 7
ERROR: dhcps send ack (error -13)
wifi evt: 9
wifi evt: 7
wifi evt: 7
...