Invalid auth token issue

Solved
1

.All,

Need help, I am using ESP32 to run blynk client & I am getting below error.

–Serial Montior log ----

15:36:58.364 -> [2638] Connected to WiFi
15:36:58.364 -> [2638] IP: 192.168.1.96
15:36:58.411 -> [2638] 
15:36:58.411 ->     ___  __          __
15:36:58.458 ->    / _ )/ /_ _____  / /__
15:36:58.458 ->   / _  / / // / _ \/  '_/
15:36:58.504 ->  /____/_/\_, /_//_/_/\_\
15:36:58.504 ->         /___/ v1.0.0 on ESP32
15:36:58.551 -> 
15:36:58.551 -> [2711] Connecting to blynk-cloud.com:80
15:36:58.692 -> [2975] Invalid auth token

/*************************************************************
  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 ESP32 chip.

  Note: This requires ESP32 support package:
    https://github.com/espressif/arduino-esp32

  Please be sure to select the right ESP32 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 <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

#define BLYNK_TEMPLATE_ID "TMPLqbkhOY-9"
#define BLYNK_DEVICE_NAME "Device1 F43EA"
#define BLYNK_HEARTBEAT 60

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "7tPNAfmunMVm4ZtElN_wVV8mFmVS5k-b";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "*************";
char pass[] = "**********";
uint8_t analogPin = 34; // Pin used to read data from GPIO34 ADC_CH6.
BlynkTimer timer; // Announcing the timer
void setup()
{
  // Debug console
  Serial.begin(9600);
  timer.setInterval(1000L, sensorDataSend); //timer will run every sec
  Blynk.begin(auth, ssid, pass);
  
}

void loop()
{
  Blynk.run();
  timer.run();        // run timer every second
}

void sensorDataSend()
{
  int sensorValue=0;
  sensorValue = analogRead(analogPin);         // reading sensor from analog pin
  Blynk.virtualWrite(V1, sensorValue);  // sending sensor value to Blynk app
}
2

I am also getting the same.
Do 1 thingy
Define server address blynk.cloud

3

Try moving these two lines up…

so that they are immediately after this line:

Pete.

1 Like
4

@vshymanskyy please update examples as it’s not the first time we see it reported.

5

@Pavel Blynk examples are correct:

1 Like
6

Hi Pete,

Thanks for the help.

Now it is working.

regards,
Rakesh

7

This fix didn’t work for me. Still getting the “Invalid Auth Token” error message

8

I’d suggest that you start a new " need help with my project " topic, and provide as much details as possible.

9

thank you so much it really helped me

1 Like
10

I found solution which esp could not connect to blynk server when invalid token. If you wrote wrong token , esp not work . Sketch always break. Fisrt step we have to control connect with valid token and if connect is true

[Unformatted code removed by moderator]

it trying max 2-3 times and you can give user that invalid token for message.

11

@Kyargic Please edit your post, using the pencil icon at the bottom, and add triple backticks at the beginning and end of your code so that it displays correctly.
Triple backticks look like this:
```

Copy and paste these if you can’t find the correct symbol on your keyboard.

Pete.

12

@Kyargic your code has been deleted because you didn’t use triple backticks when posting it, and didn’t action my request to remedy this.

In addition, your code was very strange and incomplete, and doesn’t actually address the issue. You are assuming that repeated failures to connect to WiFi and the Blynk server are caused by the incorrect Auth token being used, when in reality the issue could be a result of an incorrect WiFi SSID or password, failure of the internet connection, the Blynk server being down, a DNS issue, or the wrong Auth token.

Pete.

13

thank you so much Pete!