[GH-ISSUE #896] lots of additional Serial info causing watch dog reset

kerem commented

2026-02-28 01:26:55 +03:00

Owner

Originally created by @ThatchSS on GitHub (Jun 11, 2019).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/896

Basic Infos

Hardware

WiFimanager Branch/Release:

Master
Development

Esp8266/Esp32:

ESP8266
ESP32

Hardware: ESP-12e, esp01, esp25

ESP01
ESP12 E/F/S (nodemcu, wemos, feather)
Other

ESP Core Version: 2.4.0, staging

2.3.0
2.4.0
staging (master/dev)

Description

I am getting a lot of new info flooding over serial line causing watch dog timer to restart.
This is new and the setDebugOutput(false) dose not suppress it.
I have tried a few different boards and different core versions.
I have also tried some older sketches that I know did not produce this.
it happens on windows and apple when the captive portal connects but
don't know where it is originating from.
any help would be great.
Thanks

here is a sample of the info.

mounting FS...
mounted file system
New client
method: GET url: /hotspot-detect.html search:
headerName: Host
headerValue: captive.apple.com
headerName: Connection
headerValue: close
headerName: User-Agent
headerValue: CaptiveNetworkSupport-355.260.2 wispr
args:
Request: /hotspot-detect.html
Arguments:
request handler not found
New client
method: GET url: / search:
headerName: Host
headerValue: 192.168.4.1
headerName: Connection
headerValue: close
headerName: User-Agent
headerValue: CaptiveNetworkSupport-355.260.2 wispr
args:
Request: /
Arguments:
New client
method: GET url: /hotspot-detect.html search:
headerName: Host
headerValue: captive.apple.com
headerName: Upgrade-Insecure-Requests
headerValue: 1
headerName: Accept
headerValue: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
headerName: User-Agent
headerValue: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148
headerName: Accept-Language
headerValue: en-us
headerName: Accept-Encoding
headerValue: gzip, deflate
headerName: Connection
headerValue: keep-alive
args:
Request: /hotspot-detect.html
Arguments:
request handler not found
New client
method: GET url: / search:
headerName: Host
headerValue: 192.168.4.1
headerName: Upgrade-Insecure-Requests
headerValue: 1
headerName: Accept
headerValue: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
headerName: User-Agent
headerValue: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148
headerName: Accept-Language
headerValue: en-us
headerName: Accept-Encoding
headerValue: gzip, deflate
headerName: Connection
headerValue: keep-alive
args:
Request: /
Arguments:
New client
method: GET url: /hotspot-detect.html search:
headerName: Host
headerValue: captive.apple.com
headerName: Connection
headerValue: close
headerName: User-Agent
headerValue: CaptiveNetworkSupport-355.260.2 wispr
args:
Request: /hotspot-detect.html
Arguments:
request handler not found
New client
method: GET url: / search:
headerName: Host
headerValue: 192.168.4.1
headerName: Connection
headerValue: close
headerName: User-Agent
headerValue: CaptiveNetworkSupport-355.260.2 wispr
args:
Request: /
Arguments:

Settings in IDE

Module: NodeMcu

Additional libraries:
I seems to happen on all sketches this is from the auto connect FSP parameters and custom IP
I've tried many and can't find one that doesn't produce this

`#include <FS.h> // this needs to be first, or it all crashes and burns...
#include "WiFiManager.h" // https://github.com/tzapu/WiFiManager
#include <ArduinoJson.h> // https://github.com/bblanchon/ArduinoJson

#ifdef ESP32
#include <SPIFFS.h>
#endif

//default custom static IP
char static_ip[16] = "10.0.1.56";
char static_gw[16] = "10.0.1.1";
char static_sn[16] = "255.255.255.0";

//flag for saving data
bool shouldSaveConfig = false;

//callback notifying us of the need to save config
void saveConfigCallback () {
Serial.println("Should save config");
shouldSaveConfig = true;
}

void setupSpiffs(){
//clean FS, for testing
// SPIFFS.format();

//read configuration from FS json
Serial.println("mounting FS...");

if (SPIFFS.begin()) {
Serial.println("mounted file system");
if (SPIFFS.exists("/config.json")) {
//file exists, reading and loading
Serial.println("reading config file");
File configFile = SPIFFS.open("/config.json", "r");
if (configFile) {
Serial.println("opened config file");
size_t size = configFile.size();
// Allocate a buffer to store contents of the file.
std::unique_ptr<char[]> buf(new char[size]);

    configFile.readBytes(buf.get(), size);
    DynamicJsonBuffer jsonBuffer;
    JsonObject& json = jsonBuffer.parseObject(buf.get());
    json.printTo(Serial);
    if (json.success()) {
      Serial.println("\nparsed json");

      if(json["ip"]) {
        Serial.println("setting custom ip from config");
        strcpy(static_ip, json["ip"]);
        strcpy(static_gw, json["gateway"]);
        strcpy(static_sn, json["subnet"]);
        Serial.println(static_ip);
      } else {
        Serial.println("no custom ip in config");
      }

    } else {
      Serial.println("failed to load json config");
    }
  }
}

} else {
Serial.println("failed to mount FS");
}
//end read
}

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Serial.println();

setupSpiffs();

// WiFiManager, Local intialization. Once its business is done, there is no need to keep it around
WiFiManager wm;
wm.setDebugOutput(false);
//set config save notify callback
wm.setSaveConfigCallback(saveConfigCallback);

// set static ip
IPAddress _ip,_gw,_sn;
_ip.fromString(static_ip);
_gw.fromString(static_gw);
_sn.fromString(static_sn);
wm.setSTAStaticIPConfig(_ip, _gw, _sn);

//reset settings - wipe credentials for testing
//wm.resetSettings();

//automatically connect using saved credentials if they exist
//If connection fails it starts an access point with the specified name
//here "AutoConnectAP" if empty will auto generate basedcon chipid, if password is blank it will be anonymous
//and goes into a blocking loop awaiting configuration
if (!wm.autoConnect("AutoConnectAP", "password")) {
Serial.println("failed to connect and hit timeout");
delay(3000);
// if we still have not connected restart and try all over again
ESP.restart();
delay(5000);
}

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

//save the custom parameters to FS
if (shouldSaveConfig) {
Serial.println("saving config");
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.createObject();

json["ip"]          = WiFi.localIP().toString();
json["gateway"]     = WiFi.gatewayIP().toString();
json["subnet"]      = WiFi.subnetMask().toString();

File configFile = SPIFFS.open("/config.json", "w");
if (!configFile) {
  Serial.println("failed to open config file for writing");
}

json.prettyPrintTo(Serial);
json.printTo(configFile);
configFile.close();
//end save
shouldSaveConfig = false;

}

Serial.println("local ip");
Serial.println(WiFi.localIP());
Serial.println(WiFi.gatewayIP());
Serial.println(WiFi.subnetMask());
}

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

}`

Debug Messages

messages here

Originally created by @ThatchSS on GitHub (Jun 11, 2019). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/896 ### Basic Infos #### Hardware **WiFimanager Branch/Release:** - [x] Master - [X] Development **Esp8266/Esp32:** - [X] ESP8266 - [ ] ESP32 **Hardware: ESP-12e, esp01, esp25** - [ ] ESP01 - [X] ESP12 E/F/S (nodemcu, wemos, feather) - [ ] Other **ESP Core Version: 2.4.0, staging** - [X] 2.3.0 - [X] 2.4.0 - [ ] staging (master/dev) ### Description I am getting a lot of new info flooding over serial line causing watch dog timer to restart. This is new and the setDebugOutput(false) dose not suppress it. I have tried a few different boards and different core versions. I have also tried some older sketches that I know did not produce this. it happens on windows and apple when the captive portal connects but don't know where it is originating from. any help would be great. Thanks here is a sample of the info. mounting FS... mounted file system New client method: GET url: /hotspot-detect.html search: headerName: Host headerValue: captive.apple.com headerName: Connection headerValue: close headerName: User-Agent headerValue: CaptiveNetworkSupport-355.260.2 wispr args: Request: /hotspot-detect.html Arguments: request handler not found New client method: GET url: / search: headerName: Host headerValue: 192.168.4.1 headerName: Connection headerValue: close headerName: User-Agent headerValue: CaptiveNetworkSupport-355.260.2 wispr args: Request: / Arguments: New client method: GET url: /hotspot-detect.html search: headerName: Host headerValue: captive.apple.com headerName: Upgrade-Insecure-Requests headerValue: 1 headerName: Accept headerValue: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 headerName: User-Agent headerValue: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 headerName: Accept-Language headerValue: en-us headerName: Accept-Encoding headerValue: gzip, deflate headerName: Connection headerValue: keep-alive args: Request: /hotspot-detect.html Arguments: request handler not found New client method: GET url: / search: headerName: Host headerValue: 192.168.4.1 headerName: Upgrade-Insecure-Requests headerValue: 1 headerName: Accept headerValue: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 headerName: User-Agent headerValue: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 headerName: Accept-Language headerValue: en-us headerName: Accept-Encoding headerValue: gzip, deflate headerName: Connection headerValue: keep-alive args: Request: / Arguments: New client method: GET url: /hotspot-detect.html search: headerName: Host headerValue: captive.apple.com headerName: Connection headerValue: close headerName: User-Agent headerValue: CaptiveNetworkSupport-355.260.2 wispr args: Request: /hotspot-detect.html Arguments: request handler not found New client method: GET url: / search: headerName: Host headerValue: 192.168.4.1 headerName: Connection headerValue: close headerName: User-Agent headerValue: CaptiveNetworkSupport-355.260.2 wispr args: Request: / Arguments: ### Settings in IDE Module: NodeMcu Additional libraries: I seems to happen on all sketches this is from the auto connect FSP parameters and custom IP I've tried many and can't find one that doesn't produce this `#include <FS.h> // this needs to be first, or it all crashes and burns... #include "WiFiManager.h" // https://github.com/tzapu/WiFiManager #include <ArduinoJson.h> // https://github.com/bblanchon/ArduinoJson #ifdef ESP32 #include <SPIFFS.h> #endif //default custom static IP char static_ip[16] = "10.0.1.56"; char static_gw[16] = "10.0.1.1"; char static_sn[16] = "255.255.255.0"; //flag for saving data bool shouldSaveConfig = false; //callback notifying us of the need to save config void saveConfigCallback () { Serial.println("Should save config"); shouldSaveConfig = true; } void setupSpiffs(){ //clean FS, for testing // SPIFFS.format(); //read configuration from FS json Serial.println("mounting FS..."); if (SPIFFS.begin()) { Serial.println("mounted file system"); if (SPIFFS.exists("/config.json")) { //file exists, reading and loading Serial.println("reading config file"); File configFile = SPIFFS.open("/config.json", "r"); if (configFile) { Serial.println("opened config file"); size_t size = configFile.size(); // Allocate a buffer to store contents of the file. std::unique_ptr<char[]> buf(new char[size]); configFile.readBytes(buf.get(), size); DynamicJsonBuffer jsonBuffer; JsonObject& json = jsonBuffer.parseObject(buf.get()); json.printTo(Serial); if (json.success()) { Serial.println("\nparsed json"); if(json["ip"]) { Serial.println("setting custom ip from config"); strcpy(static_ip, json["ip"]); strcpy(static_gw, json["gateway"]); strcpy(static_sn, json["subnet"]); Serial.println(static_ip); } else { Serial.println("no custom ip in config"); } } else { Serial.println("failed to load json config"); } } } } else { Serial.println("failed to mount FS"); } //end read } void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.println(); setupSpiffs(); // WiFiManager, Local intialization. Once its business is done, there is no need to keep it around WiFiManager wm; wm.setDebugOutput(false); //set config save notify callback wm.setSaveConfigCallback(saveConfigCallback); // set static ip IPAddress _ip,_gw,_sn; _ip.fromString(static_ip); _gw.fromString(static_gw); _sn.fromString(static_sn); wm.setSTAStaticIPConfig(_ip, _gw, _sn); //reset settings - wipe credentials for testing //wm.resetSettings(); //automatically connect using saved credentials if they exist //If connection fails it starts an access point with the specified name //here "AutoConnectAP" if empty will auto generate basedcon chipid, if password is blank it will be anonymous //and goes into a blocking loop awaiting configuration if (!wm.autoConnect("AutoConnectAP", "password")) { Serial.println("failed to connect and hit timeout"); delay(3000); // if we still have not connected restart and try all over again ESP.restart(); delay(5000); } //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); //save the custom parameters to FS if (shouldSaveConfig) { Serial.println("saving config"); DynamicJsonBuffer jsonBuffer; JsonObject& json = jsonBuffer.createObject(); json["ip"] = WiFi.localIP().toString(); json["gateway"] = WiFi.gatewayIP().toString(); json["subnet"] = WiFi.subnetMask().toString(); File configFile = SPIFFS.open("/config.json", "w"); if (!configFile) { Serial.println("failed to open config file for writing"); } json.prettyPrintTo(Serial); json.printTo(configFile); configFile.close(); //end save shouldSaveConfig = false; } Serial.println("local ip"); Serial.println(WiFi.localIP()); Serial.println(WiFi.gatewayIP()); Serial.println(WiFi.subnetMask()); } void loop() { // put your main code here, to run repeatedly: }` ### Debug Messages ``` messages here ```

kerem closed this issue

2026-02-28 01:26:55 +03:00

kerem commented

2026-02-28 01:26:55 +03:00

Author

Owner

@tablatronix commented on GitHub (Jun 11, 2019):

do you have some kind of esp debugging enabled? Cause that looks like your webserver library

@tablatronix commented on GitHub (Jun 11, 2019): do you have some kind of esp debugging enabled? Cause that looks like your webserver library

kerem commented

2026-02-28 01:26:55 +03:00

Author

Owner

@tablatronix commented on GitHub (Jun 11, 2019):

/Users/user/projects/microcontrollers/dev/hardware/esp8266com/esp8266/libraries/ESP8266WebServer/src/Parsing.cpp:
  153  
  154        #ifdef DEBUG_ESP_HTTP_SERVER
  155:       DEBUG_OUTPUT.print("headerName: ");
  156        DEBUG_OUTPUT.println(headerName);
  157        DEBUG_OUTPUT.print("headerValue: ");
  ...

@tablatronix commented on GitHub (Jun 11, 2019): ``` /Users/user/projects/microcontrollers/dev/hardware/esp8266com/esp8266/libraries/ESP8266WebServer/src/Parsing.cpp: 153 154 #ifdef DEBUG_ESP_HTTP_SERVER 155: DEBUG_OUTPUT.print("headerName: "); 156 DEBUG_OUTPUT.println(headerName); 157 DEBUG_OUTPUT.print("headerValue: "); ... ```

kerem commented

2026-02-28 01:26:55 +03:00

Author

Owner

@ThatchSS commented on GitHub (Jun 11, 2019):

Not intentionally?
Do you know how I would disable it?
Is it in the Arduino IDE? Or ...?

@ThatchSS commented on GitHub (Jun 11, 2019): Not intentionally? Do you know how I would disable it? Is it in the Arduino IDE? Or ...?

kerem commented

2026-02-28 01:26:55 +03:00

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Owner

@Daemach commented on GitHub (Jun 11, 2019):

Tools menu in arduino IDE - make sure core debug is set to none.

On Mon, Jun 10, 2019 at 8:19 PM ThatchSS notifications@github.com wrote:

Not intentionally?
Do you know how I would disable it?
Is it in the Arduino IDE? Or ...?

—
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Reply to this email directly, view it on GitHub
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or mute the thread
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.

@Daemach commented on GitHub (Jun 11, 2019): Tools menu in arduino IDE - make sure core debug is set to none. On Mon, Jun 10, 2019 at 8:19 PM ThatchSS <notifications@github.com> wrote: > Not intentionally? > Do you know how I would disable it? > Is it in the Arduino IDE? Or ...? > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <https://github.com/tzapu/WiFiManager/issues/896?email_source=notifications&email_token=AC7Y5YPM5D3A45U3LCBU4YTPZ4KUPA5CNFSM4HWZX35KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODXL2IOA#issuecomment-500671544>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AC7Y5YMIW3XAD3S3FPGTWV3PZ4KUPANCNFSM4HWZX35A> > . >

kerem commented

2026-02-28 01:26:55 +03:00

Author

Owner

@ThatchSS commented on GitHub (Jun 11, 2019):

UGH!
Yah it was but I cycled it to serial and then back to none and it took care if it I think.
The little things that hang you up.
Thanks all!

@ThatchSS commented on GitHub (Jun 11, 2019): UGH! Yah it was but I cycled it to serial and then back to none and it took care if it I think. The little things that hang you up. Thanks all!

kerem referenced this issue

2026-02-28 02:12:36 +03:00

[PR #757] Logo WiFiManager #1676

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Columns

[GH-ISSUE #896] lots of additional Serial info causing watch dog reset #757

Basic Infos

Hardware

Description

Settings in IDE

Debug Messages