[GH-ISSUE #1281] wifi reconnect doesn't seem to work on ESP32 multithread environment #1096

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opened 2026-02-28 01:28:30 +03:00 by kerem · 0 comments

kerem commented

2026-02-28 01:28:30 +03:00

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Originally created by @TLS1000 on GitHub (Aug 20, 2021).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1281

Basic Infos

Hardware

WiFimanager Branch/Release: Master

Esp8266/Esp32:

Hardware: ESP32

Core Version: 2.4.0, staging

Description

Problem description
Hi, I'm using your great library in a number of ESP32 devices and they lose wifi connection; sometimes after a few days, sometimes after just a few minutes. the code is multithread, the 'loop' section is empty. It seems that the reconnect-mechanism is not successful. The problem can be avoided by manually adding a reconnect routine in the 'loop' section:

void loop() {
  if ((WiFi.status() != WL_CONNECTED) ) {
  Serial.print(millis());
  Serial.println("Reconnecting to WiFi...");
  WiFi.disconnect();
  WiFi.reconnect();
}
delay(2000);
}

The setup is:

WiFiManager wm;
void setup() {
WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
  //WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE, INADDR_NONE); // required to set hostname properly
  //WiFi.setHostname("LF2battery");
  //WiFiManager wm;
    //wm.resetSettings();  //reset settings - wipe credentials for testing
    // Automatically connect using saved credentials,
    // if connection fails, it starts an access point with the specified name ( "AutoConnectAP"),
    // if empty will auto generate SSID, if password is blank it will be anonymous AP (wm.autoConnect())
    // then goes into a blocking loop awaiting configuration and will return success result
    bool res;
    // res = wm.autoConnect(); // auto generated AP name from chipid
    // res = wm.autoConnect("AutoConnectAP"); // anonymous ap
    
    //wm.setConfigPortalBlocking(false);
    wm.setHostname("myHost");
    wm.setCleanConnect(true);
    wm.setTimeout(3);
    wm.setConnectRetries(10);
    res = wm.autoConnect("myAP","password"); // password protected ap
    if(!res) {
        Serial.println("Failed to connect");
        // ESP.restart();
    } 
    else {
        //if you get here you have connected to the WiFi    
        Serial.println("connected...yeey :)");
        myIP=WiFi.localIP();
    }
}

Settings in IDE

Module: doitV1

Additional libraries: pubsubclient, ESPmDNS,

Is there a way to let the reconnect be handled correctly by the library? thank you

Originally created by @TLS1000 on GitHub (Aug 20, 2021). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1281 ### Basic Infos #### Hardware WiFimanager Branch/Release: Master Esp8266/Esp32: Hardware: ESP32 Core Version: 2.4.0, staging ### Description Problem description Hi, I'm using your great library in a number of ESP32 devices and they lose wifi connection; sometimes after a few days, sometimes after just a few minutes. the code is multithread, the 'loop' section is empty. It seems that the reconnect-mechanism is not successful. The problem can be avoided by manually adding a reconnect routine in the 'loop' section: ``` void loop() { if ((WiFi.status() != WL_CONNECTED) ) { Serial.print(millis()); Serial.println("Reconnecting to WiFi..."); WiFi.disconnect(); WiFi.reconnect(); } delay(2000); } ``` The setup is: ``` WiFiManager wm; void setup() { WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP //WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE, INADDR_NONE); // required to set hostname properly //WiFi.setHostname("LF2battery"); //WiFiManager wm; //wm.resetSettings(); //reset settings - wipe credentials for testing // Automatically connect using saved credentials, // if connection fails, it starts an access point with the specified name ( "AutoConnectAP"), // if empty will auto generate SSID, if password is blank it will be anonymous AP (wm.autoConnect()) // then goes into a blocking loop awaiting configuration and will return success result bool res; // res = wm.autoConnect(); // auto generated AP name from chipid // res = wm.autoConnect("AutoConnectAP"); // anonymous ap //wm.setConfigPortalBlocking(false); wm.setHostname("myHost"); wm.setCleanConnect(true); wm.setTimeout(3); wm.setConnectRetries(10); res = wm.autoConnect("myAP","password"); // password protected ap if(!res) { Serial.println("Failed to connect"); // ESP.restart(); } else { //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); myIP=WiFi.localIP(); } } ``` ### Settings in IDE Module: doitV1 Additional libraries: pubsubclient, ESPmDNS, Is there a way to let the reconnect be handled correctly by the library? thank you