wifimanager resists a lil change

hello beautiful people
what i m trying to do is:-
i want to recieve data from client to my nodeMCU server …for that i was trying the example called AutoConnectWithFSParameters …code is given in the end
since i hardly can understand whats going in the code,i simply try to edit it and add my parameter…
but serial monitor throws all the garbage it has straight to ma face…
could someone please suggest me a way where i would take some other parameter along with ssid and passcode…ya…using wifimanager
thanks already

#include <FS.h>                   //this needs to be first, or it all crashes and burns...

#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

#include <ArduinoJson.h>          //https://github.com/bblanchon/ArduinoJson

//define your default values here, if there are different values in config.json, they are overwritten.
char mqtt_server[40];
char mqtt_port[6] = "8080";
char blynk_token[34] = "YOUR_BLYNK_TOKEN";

//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 setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println();

  //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");

          strcpy(mqtt_server, json["mqtt_server"]);
          strcpy(mqtt_port, json["mqtt_port"]);
          strcpy(blynk_token, json["blynk_token"]);

        } else {
          Serial.println("failed to load json config");
        }
        configFile.close();
      }
    }
  } else {
    Serial.println("failed to mount FS");
  }
  //end read



  // The extra parameters to be configured (can be either global or just in the setup)
  // After connecting, parameter.getValue() will get you the configured value
  // id/name placeholder/prompt default length
  WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
  WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
  WiFiManagerParameter custom_blynk_token("blynk", "blynk token", blynk_token, 32);

  //WiFiManager
  //Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;

  //set config save notify callback
  wifiManager.setSaveConfigCallback(saveConfigCallback);

  //set static ip
  wifiManager.setSTAStaticIPConfig(IPAddress(10,0,1,99), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
  
  //add all your parameters here
  wifiManager.addParameter(&custom_mqtt_server);
  wifiManager.addParameter(&custom_mqtt_port);
  wifiManager.addParameter(&custom_blynk_token);

  //reset settings - for testing
  //wifiManager.resetSettings();

  //set minimu quality of signal so it ignores AP's under that quality
  //defaults to 8%
  //wifiManager.setMinimumSignalQuality();
  
  //sets timeout until configuration portal gets turned off
  //useful to make it all retry or go to sleep
  //in seconds
  //wifiManager.setTimeout(120);

  //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", "password")) {
    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 :)");

  //read updated parameters
  strcpy(mqtt_server, custom_mqtt_server.getValue());
  strcpy(mqtt_port, custom_mqtt_port.getValue());
  strcpy(blynk_token, custom_blynk_token.getValue());

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

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

    json.printTo(Serial);
    json.printTo(configFile);
    configFile.close();
    //end save
  }

  Serial.println("local ip");
  Serial.println(WiFi.localIP());

}

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


}

my version of this code

#include <FS.h>                   //this needs to be first, or it all crashes and burns...

#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

#include <ArduinoJson.h>          //https://github.com/bblanchon/ArduinoJson

//define your default values here, if there are different values in config.json, they are overwritten.
char mqtt_server[40];
char mqtt_port[6] = "8080";
char blynk_token[34] = "YOUR_BLYNK_TOKEN";
char sabi[40];

//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 setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println();

  //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");

          strcpy(mqtt_server, json["mqtt_server"]);
          strcpy(mqtt_port, json["mqtt_port"]);
          strcpy(blynk_token, json["blynk_token"]);

        } else {
          Serial.println("failed to load json config");
        }
        configFile.close();
      }
    }
  } else {
    Serial.println("failed to mount FS");
  }
  //end read



  // The extra parameters to be configured (can be either global or just in the setup)
  // After connecting, parameter.getValue() will get you the configured value
  // id/name placeholder/prompt default length
  WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
  WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
  WiFiManagerParameter custom_blynk_token("blynk", "blynk token", blynk_token, 32);

  WiFiManagerParameter sabi1("sabi", "sabi1", blynk_token, 40);


  //WiFiManager
  //Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;

  //set config save notify callback
  wifiManager.setSaveConfigCallback(saveConfigCallback);

  //set static ip
  wifiManager.setSTAStaticIPConfig(IPAddress(10,0,1,99), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
  
  //add all your parameters here
  wifiManager.addParameter(&custom_mqtt_server);
  wifiManager.addParameter(&custom_mqtt_port);
  wifiManager.addParameter(&custom_blynk_token);

  wifiManager.addParameter(&sabi1);

  

  //reset settings - for testing
  //wifiManager.resetSettings();

  //set minimu quality of signal so it ignores AP's under that quality
  //defaults to 8%
  //wifiManager.setMinimumSignalQuality();
  
  //sets timeout until configuration portal gets turned off
  //useful to make it all retry or go to sleep
  //in seconds
  //wifiManager.setTimeout(120);

  //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", "password")) {
    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 :)");

  //read updated parameters
  strcpy(mqtt_server, custom_mqtt_server.getValue());
  strcpy(mqtt_port, custom_mqtt_port.getValue());
  strcpy(blynk_token, custom_blynk_token.getValue());
  strcpy(sabi, sabi1.getValue());

//  sabi= sabi1.getValue();

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

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

    json.printTo(Serial);
    json.printTo(configFile);
    configFile.close();
    //end save
  }

  Serial.println("local ip");
  Serial.println(WiFi.localIP());

}

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


}

where did you get this code ? a snippet like this

ESP.reset();
    delay(5000);
  }

makes me wonder..

i swear to god...i knew you would be first one to reply Deva_Rishi...anyway thanks

this happens to be an example with wifimanager.....you can get it from github or may be arduino ide

damn!!!!
someone help

well where is the link to the example that you copied ? can you explain what it does line by line ? You do understand that there is a lot of faulty (or incorrect code out there) and that although enjoy a little puzzle, it is not my hobby to fix everything anyone has ever posted. Even though there is probably a lot of useful ideas in the example, the 2 lines i quoted earlier show that the author does not have a complete understanding of all the lines that were written.

thanks for the reply
heres the link
https://github.com/tzapu/WiFiManager/blob/master/examples/AutoConnectWithFeedback/AutoConnectWithFeedback.ino
quite honestly........i can hardly understand what that code means.....all i know is the first code i posted works fine and second one dosent.......
this is how i learn ...hit and trials......there aint any good explination for most codes out there
thanks brah!
stay safe

I think you'll be learning better by studying something which is properly explained, rather then to try and modify something you do not understand (i also don't really understand that code, but i understand the code that i write, and sometimes i find solutions in examples and can use snippets in my own code. Making a plan, creating your own sketch using concepts that you understand will teach you a lot more than this. I don't really use the wifimanager since i wanted my own layout and wanted to have some parts in there and some parts not. The whole json thing is beyond me and up to now i haven't needed it. Anyway the advice is, Use examples that you can understand. Don't start fiddling with something that you don't have a clue about. and yeah maybe read a book about stuff you want to know about, howz the HTML coding going ?

thanks man....that was cool
html thing went well and was successful......now i wanted to replace that with wifi manager's in built property....
all the coding i have done so far was my own...but ever since i got into arduino,i felt empty and moronic.....for i just copied and pasted and just made things work.....as i as people how do i get good at it....they often replied they just googled a bit and most was hit and trails.....could you please suggest me a book....
thanks

i always go for the 'for dummies series' HTML, C++ electronics, if dummies can get it i should be able to i figure. There may be better books. Check out the examples that come with the libraries Put up a general question for programming books suggestion.

thanks brah!
am cool with c++ its just arduino libraries' examples are bugging me....how can i understand 'em if there aint no comments or online resources....