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[GH-ISSUE #840] What if cannot connect to router? #705

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opened 2026-02-28 01:26:41 +03:00 by kerem · 9 comments

kerem commented

2026-02-28 01:26:41 +03:00

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Originally created by @panosss on GitHub (Mar 4, 2019).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/840

Hi everybody.
I was studying the code in the AutoConnectWithTimeOut example.

#include           //https://github.com/esp8266/Arduino

//needed for library
#include 
#include 
#include           //https://github.com/tzapu/WiFiManager



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  //WiFiManager
  //Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;
  //reset settings - for testing
  //wifiManager.resetSettings();

  //sets timeout until configuration portal gets turned off
  //useful to make it all retry or go to sleep
  //in seconds
  wifiManager.setTimeout(180);
  
  //fetches ssid and pass and tries to connect
  //if it does not connect it starts an access point with the specified name
  //here  "AutoConnectAP"
  //and goes into a blocking loop awaiting configuration
  if(!wifiManager.autoConnect("AutoConnectAP")) {
    Serial.println("failed to connect and hit timeout");
    delay(3000);
    //reset and try again, or maybe put it to deep sleep
    ESP.reset();
    delay(5000);
  } 

  //if you get here you have connected to the WiFi
  Serial.println("connected...yeey :)");
 
}

void loop() {
  // put your main code here, to run repeatedly:

}

Let's say that my router has no power.
So my ESP82266 cannot connect to internet and the code gets stuck forever at:

 if(!wifiManager.autoConnect

Right?
So how can I make it go to the code in the main loop in this case?

What I want is this:
-at setup, try to connect to wifi
-if succeeds ok no problem If fails, again no problem, BUT don't get stucked here, continue to main loop and.
-while at main loop, try at sometime to reconnect to wifi

Originally created by @panosss on GitHub (Mar 4, 2019). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/840 Hi everybody. I was studying the code in the AutoConnectWithTimeOut example. <pre>#include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino //needed for library #include <DNSServer.h> #include <ESP8266WebServer.h> #include <WiFiManager.h> //https://github.com/tzapu/WiFiManager void setup() { // put your setup code here, to run once: Serial.begin(115200); //WiFiManager //Local intialization. Once its business is done, there is no need to keep it around WiFiManager wifiManager; //reset settings - for testing //wifiManager.resetSettings(); //sets timeout until configuration portal gets turned off //useful to make it all retry or go to sleep //in seconds wifiManager.setTimeout(180); //fetches ssid and pass and tries to connect //if it does not connect it starts an access point with the specified name //here "AutoConnectAP" //and goes into a blocking loop awaiting configuration if(!wifiManager.autoConnect("AutoConnectAP")) { Serial.println("failed to connect and hit timeout"); delay(3000); //reset and try again, or maybe put it to deep sleep ESP.reset(); delay(5000); } //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); } void loop() { // put your main code here, to run repeatedly: }</pre> Let's say that my router has no power. So my ESP82266 cannot connect to internet and the code gets stuck forever at: <pre> if(!wifiManager.autoConnect</pre> Right? So how can I make it go to the code in the main loop in this case? What I want is this: -at setup, try to connect to wifi -if succeeds ok no problem If fails, again no problem, BUT don't get stucked here, continue to main loop and. -while at main loop, try at sometime to reconnect to wifi

kerem added the

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2026-02-28 01:26:41 +03:00

kerem commented

2026-02-28 01:26:41 +03:00

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@tablatronix commented on GitHub (Mar 4, 2019):

setConfigPortalTimeout

@tablatronix commented on GitHub (Mar 4, 2019): setConfigPortalTimeout

kerem commented

2026-02-28 01:26:41 +03:00

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@panosss commented on GitHub (Mar 5, 2019):

I suppose you mean this?

From what I see, the user has to press a button for the ESP to try to connect to the WiFi, right?
This means that it cannot be done automatically but only by the intervention of the user?

@panosss commented on GitHub (Mar 5, 2019): I suppose you mean [this](https://github.com/tzapu/WiFiManager/blob/master/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino)? From what I see, the user has to press a button for the ESP to try to connect to the WiFi, right? This means that it cannot be done automatically but only by the intervention of the user?

kerem commented

2026-02-28 01:26:41 +03:00

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@tablatronix commented on GitHub (Mar 5, 2019):

No , its in the docs.
https://github.com/tzapu/WiFiManager#configuration-portal-timeout

You do not have to deal with reconnect, esp does it automatically, just check for connected now and then , or startConfigPortal on demand

@tablatronix commented on GitHub (Mar 5, 2019): No , its in the docs. https://github.com/tzapu/WiFiManager#configuration-portal-timeout You do not have to deal with reconnect, esp does it automatically, just check for connected now and then , or startConfigPortal on demand

kerem commented

2026-02-28 01:26:41 +03:00

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@panosss commented on GitHub (Mar 5, 2019):

How about this code? It tries to connect for 3 minutes, and if doesn't succeed just proceeds to main loop????

#include           //https://github.com/esp8266/Arduino

//needed for library
#include 
#include 
#include           //https://github.com/tzapu/WiFiManager



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFiManager wifiManager;   
   
  wifiManager.setConfigPortalTimeout(180);
 
  if(!wifiManager.autoConnect("AutoConnectAP")) {
    Serial.println("failed to connect and hit timeout");
    delay(3000);
    //reset and try again, or maybe put it to deep sleep
    ESP.reset();
    delay(5000);
  } 

  //if you get here you have connected to the WiFi
  Serial.println("connected...yeey :)");
}

void loop() {
  // put your main code here, to run repeatedly:

}

@panosss commented on GitHub (Mar 5, 2019): How about this code? It tries to connect for 3 minutes, and if doesn't succeed just proceeds to main loop???? <pre> #include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino //needed for library #include <DNSServer.h> #include <ESP8266WebServer.h> #include <WiFiManager.h> //https://github.com/tzapu/WiFiManager void setup() { // put your setup code here, to run once: Serial.begin(115200); WiFiManager wifiManager; wifiManager.setConfigPortalTimeout(180); if(!wifiManager.autoConnect("AutoConnectAP")) { Serial.println("failed to connect and hit timeout"); delay(3000); //reset and try again, or maybe put it to deep sleep ESP.reset(); delay(5000); } //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); } void loop() { // put your main code here, to run repeatedly: } </pre>

kerem commented

2026-02-28 01:26:41 +03:00

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@tablatronix commented on GitHub (Mar 5, 2019):

That will start the configportal and timeout after 180 seconds
if you want to try to connect for 3 minutes use setConnectTimeout

   //sets timeout before AP,webserver loop ends and exits even if there has been no setup.
    //useful for devices that failed to connect at some point and got stuck in a webserver loop
    //in seconds setConfigPortalTimeout is a new name for setTimeout, ! not used if setConfigPortalBlocking
    void          setConfigPortalTimeout(unsigned long seconds);

    //sets timeout for which to attempt connecting, useful if you get a lot of failed connects
    void          setConnectTimeout(unsigned long seconds);

autoconnect->connecttwifitimer->configportalloop( no reconnection occurs here, atm )

@tablatronix commented on GitHub (Mar 5, 2019): That will start the configportal and timeout after 180 seconds if you want to try to connect for 3 minutes use setConnectTimeout ```C++ //sets timeout before AP,webserver loop ends and exits even if there has been no setup. //useful for devices that failed to connect at some point and got stuck in a webserver loop //in seconds setConfigPortalTimeout is a new name for setTimeout, ! not used if setConfigPortalBlocking void setConfigPortalTimeout(unsigned long seconds); //sets timeout for which to attempt connecting, useful if you get a lot of failed connects void setConnectTimeout(unsigned long seconds); ``` autoconnect->connecttwifitimer->configportalloop( no reconnection occurs here, atm )

kerem commented

2026-02-28 01:26:41 +03:00

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@panosss commented on GitHub (Mar 5, 2019):

No, I don't want to try to connect for 3 minutes.
I just descried what I thought it does. I was wrong.

So, my program now is completely ok?
If it does not connect at setup, it will, automatically, try to connect sometime at the main loop?

@panosss commented on GitHub (Mar 5, 2019): No, I don't want to try to connect for 3 minutes. I just descried what I thought it does. I was wrong. So, my program now is completely ok? If it does not connect at setup, it will, automatically, try to connect sometime at the main loop?

kerem commented

2026-02-28 01:26:41 +03:00

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@tablatronix commented on GitHub (Mar 5, 2019):

well no because you have
ESP.reset();

@tablatronix commented on GitHub (Mar 5, 2019): well no because you have ESP.reset();

kerem commented

2026-02-28 01:26:41 +03:00

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@dontsovcmc commented on GitHub (Mar 27, 2019):

@tablatronix my way is right or I can use setConnectTimeout?

#define ESP_CONNECT_TIMEOUT 5000  //5 sec
WiFi.mode(WIFI_STA);
WiFi.begin(); 

uint32_t start = millis();
while (WiFi.status() != WL_CONNECTED && millis() - start < ESP_CONNECT_TIMEOUT) {
    delay(200);
}

if (WiFi.status() == WL_CONNECTED) {
	//do smth
}

@dontsovcmc commented on GitHub (Mar 27, 2019): @tablatronix my way is right or I can use setConnectTimeout? ``` #define ESP_CONNECT_TIMEOUT 5000 //5 sec WiFi.mode(WIFI_STA); WiFi.begin(); uint32_t start = millis(); while (WiFi.status() != WL_CONNECTED && millis() - start < ESP_CONNECT_TIMEOUT) { delay(200); } if (WiFi.status() == WL_CONNECTED) { //do smth } ```

kerem commented

2026-02-28 01:26:41 +03:00

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@tablatronix commented on GitHub (Mar 27, 2019):

Both should work

@tablatronix commented on GitHub (Mar 27, 2019): Both should work