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Esp8266 nodemcu x

Arduino: 1.8.9 (Windows 7), Board: “NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled, All SSL ciphers (most compatible), 4M (no SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 115200”

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino:41:11: error: redefinition of 'char auth []'

 char auth[] = "YourAuthToken";

           ^

ESP8266_Standalone:41:6: error: 'char auth [33]' previously defined here

 char auth[] = "4HXSGBbFaSP8trWNq2SWmZFKPJieUTKv";

      ^

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino:45:11: error: redefinition of 'char ssid []'

 char ssid[] = "YourNetworkName";

           ^

ESP8266_Standalone:45:6: error: 'char ssid [6]' previously defined here

 char ssid[] = "moudi";

      ^

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino:46:11: error: redefinition of 'char pass []'

 char pass[] = "YourPassword";

           ^

ESP8266_Standalone:46:6: error: 'char pass [12]' previously defined here

 char pass[] = "youkoko2010";

      ^

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino: In function 'void setup()':

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino:48:6: error: redefinition of 'void setup()'

 void setup()

      ^

ESP8266_Standalone:48:6: error: 'void setup()' previously defined here

 void setup()

      ^

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino: In function 'void loop()':

C:\Users\hcc\AppData\Local\Temp\arduino_modified_sketch_697744\ESP8266_Standalone (2).ino:56:6: error: redefinition of 'void loop()'

 void loop()

      ^

ESP8266_Standalone:56:6: error: 'void loop()' previously defined here

 void loop()

      ^

exit status 1
'char auth [33]' previously defined here

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
(
/*************************************************************
  Download latest Blynk library here:
    https://github.com/blynkkk/blynk-library/releases/latest

  Blynk is a platform with iOS and Android apps to control
  Arduino, Raspberry Pi and the likes over the Internet.
  You can easily build graphic interfaces for all your
  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: http://www.blynk.cc
    Sketch generator:           http://examples.blynk.cc
    Blynk community:            http://community.blynk.cc
    Follow us:                  http://www.fb.com/blynkapp
                                http://twitter.com/blynk_app

  Blynk library is licensed under MIT license
  This example code is in public domain.

 *************************************************************
  This example runs directly on ESP8266 chip.

  Note: This requires ESP8266 support package:
    https://github.com/esp8266/Arduino

  Please be sure to select the right ESP8266 module
  in the Tools -> Board menu!

  Change WiFi ssid, pass, and Blynk auth token to run :)
  Feel free to apply it to any other example. It's simple!
 *************************************************************/

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial


#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "nkkjnkononhiubnnnnniun";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "moudi";
char pass[] = "youkoko2010";

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}

I’ve edited your post to add triple backticks at the beginning and g and end of your code, and your compiler output, so that they display correctly.
In future, please add these yourself or your code will be deleted.
Triple backticks look like this:
```

I’ve also reclassified your post from “issues and errors” to “need help with my project”.
Issues and errors is used for bug reporting, this is not a bug.

Your compiler output doesn’t match your code. The compiler errors are saying that you have multiple declarations of variables and functions.

My advice would be to create a new sketch in the IDE, delete the few lines of code that are created automatically, paste the code from the sketch builder and edit that code to add-in your SSID, Wi-Fi password and Blynk Auth code.

Pete.

/*************************************************************
Download latest Blynk library here:
https://github.com/blynkkk/blynk-library/releases/latest

Blynk is a platform with iOS and Android apps to control
Arduino, Raspberry Pi and the likes over the Internet.
You can easily build graphic interfaces for all your
projects by simply dragging and dropping widgets.

Downloads, docs, tutorials: http://www.blynk.cc
Sketch generator:           http://examples.blynk.cc
Blynk community:            http://community.blynk.cc
Follow us:                  http://www.fb.com/blynkapp
                            http://twitter.com/blynk_app

Blynk library is licensed under MIT license
This example code is in public domain.


You’ll need:

  • Blynk App (download from AppStore or Google Play)
  • ESP8266 board
  • Decide how to connect to Blynk
    (USB, Ethernet, Wi-Fi, Bluetooth, …)

There is a bunch of great example sketches included to show you how to get
started. Think of them as LEGO bricks and combine them as you wish.
For example, take the Ethernet Shield sketch and combine it with the
Servo example, or choose a USB sketch and add a code from SendData
example.
*************************************************************/

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = “4HXSGBbFaSP8trWNq2SWmZFKPJieUTKv”;

// Your WiFi credentials.
// Set password to “” for open networks.
char ssid[] = “moudi”;
char pass[] = “youkoko2010”;

void setup()
{
// Debug console
Serial.begin(9600);

Blynk.begin(auth, ssid, pass);
// You can also specify server:
//Blynk.begin(auth, ssid, pass, “blynk-cloud.com”, 80);
//Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
}

void loop()
{
Blynk.run();
// You can inject your own code or combine it with other sketches.
// Check other examples on how to communicate with Blynk. Remember
// to avoid delay() function!
}

___  __          __

/ _ )/ /_ _____ / /__
/ _ / / // / _ / '/
/
//_, /////_
/
__/ v0.6.1 on NodeMCU

[6780] Connecting to blynk-cloud.com:80
[10049] Login timeout
[12049] Connecting to blynk-cloud.com:80
[15064] Login timeout
[17064] Connecting to blynk-cloud.com:80
[20146] Login timeout
[22146] Connecting to blynk-cloud.com:80
[27178] Connecting to blynk-cloud.com:80
[30189] Login timeout
[32189] Connecting to blynk-cloud.com:80
[37213] Connecting to blynk-cloud.com:80
[40233] Login timeout
[42233] Connecting to blynk-cloud.com:80
[47244] Connecting to blynk-cloud.com:80
[50263] Login timeout
[52263] Connecting to blynk-cloud.com:80
[55278] Login timeout
[57278] Connecting to blynk-cloud.com:80
[60296] Login timeout
[62296] Connecting to blynk-cloud.com:80
[65325] Login timeout
[67325] Connecting to blynk-cloud.com:80
[72343] Connecting to blynk-cloud.com:80
[75367] Login timeout
[77367] Connecting to blynk-cloud.com:80
[82385] Connecting to blynk-cloud.com:80
[85406] Login timeout
[87406] Connecting to blynk-cloud.com:80
[92438] Connecting to blynk-cloud.com:80
[95461] Login timeout
[97461] Connecting to blynk-cloud.com:80
[100483] Login timeout
[102483] Connecting to blynk-cloud.com:80
[105497] Login timeout
[107497] Connecting to blynk-cloud.com:80
[110515] Login timeout
[112515] Connecting to blynk-cloud.com:80
[117535] Connecting to blynk-cloud.com:80
[120563] Login timeout
[122563] Connecting to blynk-cloud.com:80
[128246] Connecting to blynk-cloud.com:80
[131367] Login timeout

what i should do tolet it work if there is something wrong can u please correct it for me

I’ve made your private message to me public. Please keep discussions of this type public so that all forum members can contribute to a solution.

Please edit your post above (the one that contains the code and the serial output) using the pencil icon at the bottom of the post, and add triple backticks at the beginning and end of both the code and the serial monitor output, so that they display correctly.
Triple backticks look like this (you can copy and past them if necessary):
```

Once you’ve done this I’ll point you in the right direction.

Pete.