Station disconnects in a period in WIFI_AP_STA mode

[vitotai]

Basic Infos

Hardware

Hardware: ESP-12 ( WEMOS D1 mini)
Core Version: 2.3.0

Description

The main issue is that the station disconnects from AP every 5 to 10 minutes when set to WIFI_AP_STA mode.

My real sketch creates a ESPAsyncWebServer and hosts a ServerSideEvent. It's funny that if a client, a browser, connects to it, then the disconnection won't happen.

A minor issue is that ESP8266 seems to connect to the saved AP before WiFi.begin() is called. My real sketch will open a configuration file before setup the network. The delay() in setup() is used to simulate it.

Settings in IDE

Module: Core Development Module
Flash Size: 4MB/3MB
CPU Frequency: 80Mhz
Flash Mode: DIO
Flash Frequency: 40Mhz
Upload Using: SERIAL
Reset Method: nodemcu

Sketch

#include <ESP8266WiFi.h>


char *_apName="myapname";
char *_apPassword="myapname";

char *SSID="VH";
char *PASS="--------";

void setup()
{
	Serial.begin(115200);
	Serial.setDebugOutput(true);
	delay(2000);
	WiFi.mode(WIFI_AP_STA);
	WiFi.setAutoReconnect(false);
	Serial.printf("Start SoftAP\n");
	// start a AP.
	WiFi.softAP(_apName,_apPassword);

 	if( WiFi.status() == WL_CONNECTED){
 		Serial.printf("Already connected!!! who did it?\n");
 	}else{			
		WiFi.begin(SSID,PASS);
		bool timeout = false;
		int i=0;
		while(WiFi.status() != WL_CONNECTED && !timeout) {
        	delay(200);
    		timeout = i++ > 100;
   			Serial.printf(".");
    	}
 	}
 	// timeout or not
}

void loop()
{
	if(WiFi.status() != WL_CONNECTED) {
		Serial.printf("disconnected!!\n");
		WiFi.reconnect();
		bool timeout = false;
		int i=0;
		while(WiFi.status() != WL_CONNECTED && !timeout) {
        	delay(200);
    		timeout = i++ > 100;
   			Serial.printf(".");
    	}
		
	}
}

Debug Messages

 1384, room 16 
tail 8
chksum scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 9
cnt 

connected with VH, channel 11
dhcp client start...
wifi evt: 0
ip:192.168.31.198,mask:255.255.255.0,gw:192.168.31.1
wifi evt: 3
Start SoftAP
bcn 0
del if1
pm open,type:2 0
add if1
pm close 7
dhcp server start:(ip:192.168.4.1,mask:255.255.255.0,gw:192.168.4.1)
bcn 100
Already connected!!! who did it?
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
state: 5 -> 2 (3c0)
rm 0
wifi evt: 1
STA disconnect: 3

[Hagenmue]

Hello,
I have a similar problem. Have you solved the problem? If, so, please give a hint.

[vitotai]

NO. I have no idea how to debug this issue.
The disconnection seems to happen only when there is NO connection of STATION IP, so my application seems to work fine.

[Hagenmue]

Thank you for your your reply.