Arduino Mega2560 + Esp8266 + Redirecting to Error

I have two Arduinos communicated through I2C. One executes critical tasks and the other only takes care of the Blynk connection. The first one sends two data every 3 seconds to the second. The second one receives them and updates the Blynk application. It works correctly for hours and then the arduino that controls Blynk hangs up. The message that shows is Redirecting to Somebody could help me? Thank you!

My Sketch:

#define BLYNK_PRINT Serial
#include <SoftwareSerial.h>
#include <Wire.h>
#include <avr/wdt.h>
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>

const int ledPin = 13; // the number of the LED pin

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

// Your WiFi credentials.
// Set password to “” for open networks.
//char ssid[] = “XXX”;
//char pass[] = “XXX”;
//char ssid[] = “XXX”;
//char pass[] = “XXX”;
char ssid[] = “XXX”;
char pass[] = “XXX”;
//char server[] = “”;
//unsigned int port = 80;

// Hardware Serial on Mega, Leonardo, Micro…
#define EspSerial Serial1

// or Software Serial on Uno, Nano…
//#include <SoftwareSerial.h>
//SoftwareSerial EspSerial(2, 3); // RX, TX

#define ESP8266_BAUD 9600

ESP8266 wifi(&EspSerial);

boolean EstadoComCasa2 = 1;
boolean EstadoComFrente2 = 0;
boolean EstadoAutoMan2 =1;
boolean EstadoTanqueBajo2 = 1;

uint8_t PorcentajeNivelTanque2=10;// De nivel de tanque de agua
uint8_t PresionAgua2=10;

int inByte[] = { 0, 0}; // incoming serial byte

WidgetLED LED1(V2);//EstadoComCasa2
WidgetLED LED2(V3);//EstadoComFrente2
WidgetLED LED3(V4);//EstadoAutoMan2
WidgetLED LED4(V5);//EstadoTanqueBajo2

BlynkTimer timer; // Create a Timer object called “timer”!

//void(*resetFunc)(void)=0;//declare reset function @address 0
//long ContadorReset=0;

void setup()
// Debug console
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);

// Registramos el evento al recibir datos
// Set ESP8266 baud rate
Blynk.begin(auth, wifi, ssid, pass);
//wifi.setDHCP(1, 1, 1); //Enable dhcp in station mode and save in flash of esp8266
//Blynk.connectWiFi(ssid, pass); // used with Blynk.connect() in place of Blynk.begin(auth, ssid, pass, server, port);
// line below needs to be BEFORE Blynk.connect()
timer.setInterval(1000L, sendUptime); // Here you set interval (1sec) and which function to call
timer.setInterval(20000L, CheckConnection); // Here you set interval (1sec) and which function to call
timer.setInterval(10000L, EnviarSolicitudDatos); // Here you set interval (1sec) and which function to call

Serial.println(“Inicializacion Completa!”);

void CheckConnection(){ // check every 11s if connected to Blynk server
Serial.println(“No Conectado al Servidor Blynk”);
//Blynk.connect(); // try to connect to server with default timeout
Serial.println(“Conectado al Servidor Blynk”);

void EnviarSolicitudDatos(){
digitalWrite(ledPin, HIGH);
Wire.write(4);//codigo para solicitar datos 4

void loop()
}; // BlynkTimer is working…
// 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!

void sendUptime()
// This function sends Arduino up time every 20 second to Virtual Pin (V5)
// In the app, Widget’s reading frequency should be set to PUSH
// You can send anything with any interval using this construction
// Don’t send more that 10 values per second
//Serial.println(“ENTRO AL TIME”);
digitalWrite(ledPin, LOW);
if(EstadoComCasa2==1) LED1.on();
if(EstadoComFrente2==1) LED2.on();
if(EstadoAutoMan2==1) LED3.on();
if(EstadoTanqueBajo2==1) LED4.on();
Blynk.virtualWrite(V0, PresionAgua2);
Blynk.virtualWrite(V1, PorcentajeNivelTanque2);

void EventoRecepcion(int howMany) {
// Si hay 2 bytes disponibles, cual variable y valor
if (Wire.available() == 2) {
inByte[0] =;

if (Wire.available() == 1)
inByte[1] =;
//Serial.print(", ");

void GuardarVariable(){
if(inByte[0] == 1) PorcentajeNivelTanque2=inByte[1];
if(inByte[0] == 2) PresionAgua2=inByte[1];
if(inByte[0] == 3) EstadoComCasa2=inByte[1];
if(inByte[0] == 4) EstadoComFrente2=inByte[1];
if(inByte[0] == 5) EstadoAutoMan2=inByte[1];
if(inByte[0] == 6) EstadoTanqueBajo2=inByte[1];


@Dmitriy FYI

@Carlosbj if i understood you correctly you have 8080 port blocked? Am I right?

@vshymanskyy this issue was fixed already but not yet deployed.

Good morning @Dmitriy. First of all I want to congratulate you for the idea of ​​Blynk, since it is a disruptive idea, extremely useful.

Port 8080 is not blocked. While the message is (Redirecting to …), the system connects and disconnects repeatedly to the Blynk server. But when it does not show that message, everything works correctly. Precisely my sketch has been running since yesterday and already has more than 12 hours to do it correctly, but there are times when the problem mentioned appears again.

I think Blynk works very well for simple sketches , but when integrated with complex and critical tasks, Blynk is not so stable and secure.

I want to give reliability and security 24/7/365 to Blynk with support of complex and critical tasks. My solution so far is to use two dedicated arduinos, one for critical and complex executions and another exclusively for Blynk to execute. Both I communicate by I2C.

I would like to know the reason why this error message appears sporadically?

I am from Costa Rica and studied engineering in electronics and electromechanical engineering, I also have CCNA, WiFi, Security and CCNP and I a Cisco Systems Instructor. I tell you this to put myself at your service in whatever you may need.


In that case most likely problem not in it. The actual bug with redirecting is that it should return port 80 and not 8080. However, in case port 8080 not blocked this should not be a case.

What made you think so?

What does ping to shows?
What ping to “redirected” IP shows?

A post was split to a new topic: Redirecting and connecting/disconnecting messages