I want to connect an external indicator locally to know disconnection from the blynk project

Hello I need help, I want to turn on a relay when my project loses connection with Blyn, where would it be in the code? thanks in advance

[Unformatted code removed by moderator]

@ale24cba You seem to have forgotten how to post code correctly, using triple backticks at the beginning and end!

Pete.

#include <FS.h>    
//#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> 
#include <ArduinoJson.h>
//for LED status
#include <Ticker.h>
Ticker ticker;

bool alarm_mode = false ;
bool verificador = false;
//int led_placa = 2;
int sensor = 5;
int buzzer = 15;
int alarm_led = 4;
int alarm_led_off = 0;
int indicador = 13;
int ledPin = 14;
int contconexion = 0;
int conteoReactivacion = 0;
int ledState = LOW;             // ledState used to set the LED
int VirtualPinA = 3;
    
//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] = "ymzp8hEq9d4UmNguWdvF7PhDj8nVUTlc"; 

//flag for saving data
bool shouldSaveConfig = false;

//callback notifying us of the need to save config

void tick()
{
  //toggle state
  int state = digitalRead(indicador);  // get the current state of GPIO1 pin
  digitalWrite(indicador, !state);     // set pin to the opposite state
}

void ledState1()
{
   if (ledState == LOW) {
      ledState = HIGH;
      Blynk.virtualWrite(VirtualPinA, 0);
     
    } else {
      ledState = LOW;
      Blynk.virtualWrite(VirtualPinA, 1023);
     
    }
  }

//gets called when WiFiManager enters configuration mode
void configModeCallback (WiFiManager *myWiFiManager) {
  Serial.println("Entered config mode");
  Serial.println(WiFi.softAPIP());
  //if you used auto generated SSID, print it
  Serial.println(myWiFiManager->getConfigPortalSSID());
  //entered config mode, make led toggle faster
  ticker.attach(0.2, tick);
}
void saveConfigCallback () {
  Serial.println("Should save config");
  shouldSaveConfig = true;
  }
// Keep this flag not to re-sync on every reconnection
bool isFirstConnect = true;
// This function will run every time Blynk connection is established
BLYNK_CONNECTED() 
{
  if (isFirstConnect) 
  {
    // Request Blynk server to re-send latest values for all pins
    Blynk.syncAll();
    isFirstConnect = false;
  }
}

  BlynkTimer timer;
void myTimerEvent() {
//Serial.println("Tiempo des en seg: " + String(conteoReactivacion));
  if (alarm_mode == false) {
    conteoReactivacion++;
    if (conteoReactivacion >= 1800) { 
      Blynk.virtualWrite(V1, 1);
      digitalWrite(alarm_led, HIGH);
      digitalWrite(alarm_led_off, LOW);
      alarm_mode = true;
    }
  } else {
    conteoReactivacion = 0;
  }
  if (digitalRead(sensor) == 0) {
    Blynk.virtualWrite(V0, "NORMAL");
    delay(3000);   // Tiempo de demora al recibir señal de disparo
  }
  if (digitalRead(sensor) == 1)

  {
    Blynk.virtualWrite(V0, "ALERTA");
    
    if (alarm_mode == true)
      //AUTOR ALEXIS MORA
    {
      Blynk.email("clianaloss01@gmail.com", "Historial de Alarmas", "Alarma Disparo");
      Blynk.notify("Alarma Disparo");
      digitalWrite(buzzer, HIGH);
      delay(500);
      digitalWrite(buzzer, LOW);
    }                                                                                  
  }
}
BLYNK_WRITE(V1) {
  Serial.println(param.asInt());
  switch (param.asInt()) {
    case 1: {
        alarm_mode = true;
        digitalWrite(alarm_led, HIGH);
        digitalWrite(alarm_led_off, LOW);
        break;
      }
    case 2: {
        alarm_mode = false;
        digitalWrite(buzzer, LOW);
        digitalWrite(alarm_led, LOW);
        digitalWrite(alarm_led_off, HIGH);
        break;
    }    
  }
}

void setup()
{
  pinMode(sensor, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
  pinMode(alarm_led, OUTPUT);
  pinMode(alarm_led_off, OUTPUT);
  pinMode(indicador, OUTPUT);
//pinMode(led_placa, OUTPUT);
//pinMode(BUILTIN_LED, OUTPUT);
//start ticker with 0.5 because we start in AP mode and try to connect
  ticker.attach(0.6, tick);
 
  // Debug console
  Serial.begin(115200);
   Serial.println();
   
  //clean FS, for testing
  //SPIFFS.format();
 // Blynk.begin(auth, ssid, pass);
  // Setup a function to be called every second
  timer.setInterval(1000L, myTimerEvent);
  timer.setInterval(1000L, ledState1); //timer will run every sec 

  // put your setup code here, to run once:
  
  //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, 34);

  //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(); //borra usuario y contraseña cuando esta linea esta sin comentar al grabar.
  //set callback that gets called when connecting to previous WiFi fails, and enters Access Point mode
  wifiManager.setAPCallback(configModeCallback);
  //set minimu quality of signal so it ignores AP's under that quality
   //  defaults to 8%
  wifiManager.setMinimumSignalQuality( 20 );
  
  //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("NanoWifi", "12345678")) {
    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
  }

 while (WiFi.status() != WL_CONNECTED) {
       int mytimeout = 5;
       delay(500);
       Serial.print(".");
       if((millis() / 1000) > mytimeout ){ // try for less than 6 seconds to connect to WiFi router
         Serial.println(" ");
          break;
          }
   }

  if(WiFi.status() == WL_CONNECTED){  
    //if you get here you have connected to the WiFi
   Serial.println(" ");
   Serial.println("connected to WiFi!! yay :)");
   Serial.println("IP address: ");
   Serial.println(WiFi.localIP()); 
  ticker.detach();
  //keep LED on
  digitalWrite(indicador, HIGH);
}
 
  Blynk.config(blynk_token);
  bool result = Blynk.connect();

  if (result != true)
  {
  Serial.println("BLYNK Connection Fail");
  Serial.println(blynk_token);
  wifiManager.resetSettings();  
  ESP.reset();
  delay (1000);
  }
    }
  
void loop()
{
  Blynk.run();
  timer.run(); // Initiates BlynkTimer  
}

Add a timer that checks if Blynk.connected()=false

Pete.

I am trying to implement what you tell me and I do not achieve anything, my knowledge is very limited, my idea is the following, is to do a “life test” of the equipment, and implement the flashing of the led with the timer library that you give me. you helped, and it works great! with that led flashing locally, I thought to monitor if the program hangs … or if there is an internet disconnection, but note that if I turn off the router or disconnect the internet the led keeps flashing !! and it never stops, I thought that when the network was left without the LED would stop flashing but it is not like that! That is why I asked you and you let me know that with Blynk.connected I could know about the internet disconnection, I need to know if you can guide me to implement the Blynk.connected () = false I want that life test led to be fixed by the time that there is no internet and then it returns to its normal state when the connection is restored. thanks in advance @PeteKnight

#include <FS.h>    
//#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> 
#include <ArduinoJson.h>
//for LED status
#include <Ticker.h>
Ticker blueticker;        // Initialise the Ticker object called blueticker
Ticker ticker;

bool alarm_mode = false ;
bool verificador = false;
int led_placa = 4;
int sensor = 5;
int buzzer = 15;
//int alarm_led = 4;
int alarm_led_off = 0;
int indicador = 13;
int ledPin = 14;
int contconexion = 0;
int conteoReactivacion = 0;
int ledState = LOW;             // ledState used to set the LED
int VirtualPinA = 3;
    
//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] = "ymzp8hEq9d4UmNguWdvF7PhDj8nVUTlc"; 

//flag for saving data
bool shouldSaveConfig = false;

//callback notifying us of the need to save config

void flashblue() // Non-blocking ticker for Blue LED
{
  Serial.println("Latido enviado!");
  int state = digitalRead(led_placa);  // get the current state of the blue_led pin
  digitalWrite(led_placa, !state);        // set pin to the opposite state
}

void tick()
{
  //toggle state
  int state = digitalRead(indicador);  // get the current state of GPIO1 pin
  digitalWrite(indicador, !state);     // set pin to the opposite state
}

void ledState1()
{
   if (ledState == LOW) {
      ledState = HIGH;
      Blynk.virtualWrite(VirtualPinA, 0);
      
    } else {
      ledState = LOW;
      Blynk.virtualWrite(VirtualPinA, 1023);
      
    }
  }

//gets called when WiFiManager enters configuration mode
void configModeCallback (WiFiManager *myWiFiManager) {
  Serial.println("Entered config mode");
  Serial.println(WiFi.softAPIP());
  //if you used auto generated SSID, print it
  Serial.println(myWiFiManager->getConfigPortalSSID());
  //entered config mode, make led toggle faster
  ticker.attach(0.2, tick);
}
void saveConfigCallback () {
  Serial.println("Should save config");
  shouldSaveConfig = true;
  }
// Keep this flag not to re-sync on every reconnection
bool isFirstConnect = true;
// This function will run every time Blynk connection is established
BLYNK_CONNECTED() 
{
  if (isFirstConnect) 
  {
    // Request Blynk server to re-send latest values for all pins
    Blynk.syncAll();
    isFirstConnect = false;
  }
}

  BlynkTimer timer;
void myTimerEvent() {
Serial.println("Tiempo des en seg: " + String(conteoReactivacion));
  if (alarm_mode == false) {
    conteoReactivacion++;
    if (conteoReactivacion >= 1800) { 
      Blynk.virtualWrite(V1, 1);
     // digitalWrite(alarm_led, HIGH);
      digitalWrite(alarm_led_off, LOW);
      alarm_mode = true;
    }
  } else {
    conteoReactivacion = 0;
  }
  if (digitalRead(sensor) == 0) {
    Blynk.virtualWrite(V0, "NORMAL");
    delay(3000);   // Tiempo de demora al recibir señal de disparo
  }
  if (digitalRead(sensor) == 1)

  {
    Blynk.virtualWrite(V0, "ALERTA");
    
    if (alarm_mode == true)
      //AUTOR ALEXIS MORA
    {
      Blynk.email("clianaloss01@gmail.com", "Historial de Alarmas", "Alarma Disparo");
      Blynk.notify("Alarma Disparo");
      digitalWrite(buzzer, HIGH);
      delay(500);
      digitalWrite(buzzer, LOW);
    }                                                                                  
  }
}
BLYNK_WRITE(V1) {
  Serial.println(param.asInt());
  switch (param.asInt()) {
    case 1: {
        alarm_mode = true;
        //digitalWrite(alarm_led, HIGH);
        digitalWrite(alarm_led_off, LOW);
        break;
      }
    case 2: {
        alarm_mode = false;
        digitalWrite(buzzer, LOW);
        //digitalWrite(alarm_led, LOW);
        digitalWrite(alarm_led_off, HIGH);
        break;
    }    
  }
}

void setup()
{
  pinMode(sensor, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
 // pinMode(alarm_led, OUTPUT);
//  pinMode(blue_led, OUTPUT); 
  pinMode(alarm_led_off, OUTPUT);
  pinMode(indicador, OUTPUT);
pinMode(led_placa, OUTPUT);
//pinMode(BUILTIN_LED, OUTPUT);
  ticker.attach(0.6, tick);
  blueticker.attach(0.8, flashblue);  // start blueticker with 0.1 second flash rate 
  Serial.println("*** Arduino reset ***");
 
  // Debug console
  Serial.begin(115200);
   Serial.println();
   
  //clean FS, for testing
  //SPIFFS.format();
 // Blynk.begin(auth, ssid, pass);
  // Setup a function to be called every second
  timer.setInterval(1000L, myTimerEvent);
  timer.setInterval(1000L, ledState1); //timer will run every sec 

  // put your setup code here, to run once:
  
  //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, 34);

  //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(); //borra usuario y contraseña cuando esta linea esta sin comentar al grabar.
  //set callback that gets called when connecting to previous WiFi fails, and enters Access Point mode
  wifiManager.setAPCallback(configModeCallback);
  //set minimu quality of signal so it ignores AP's under that quality
   //  defaults to 8%
  wifiManager.setMinimumSignalQuality( 20 );
  
  //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("NanoWifi", "12345678")) {
    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
  }

 while (WiFi.status() != WL_CONNECTED) {
       int mytimeout = 5;
       delay(500);
       Serial.print(".");
       if((millis() / 1000) > mytimeout ){ // try for less than 6 seconds to connect to WiFi router
         Serial.println(" ");
          break;
          }
   }

  if(WiFi.status() == WL_CONNECTED){  
    //if you get here you have connected to the WiFi
   Serial.println(" ");
   Serial.println("connected to WiFi!! yay :)");
   Serial.println("IP address: ");
   Serial.println(WiFi.localIP()); 
  ticker.detach();
  //keep LED on
  digitalWrite(indicador, HIGH);
}
 
  Blynk.config(blynk_token);
  bool result = Blynk.connect();

  if (result != true)
  {
  Serial.println("BLYNK Connection Fail");
  Serial.println(blynk_token);
  wifiManager.resetSettings();  
  ESP.reset();
  delay (1000);
  }
    }
  
void loop()
{
  Blynk.run();
  timer.run(); // Initiates BlynkTimer 
    
}

I’m not really clear which physical LED it is that you want to change the state of if there is no Blynk connection, but I’d suggest that you modify your ledState1() function to perform a Blynk.connected () test, and use that to change the state of your LED.
If it’s your led_placa LED which has a constant ticker running (the wrong approach in my opinion, far better to flash something in an alert status rather than in a normal status) then you’d need to detach the ticker and re-attach it once Blynk.connected() is true.

Pete.

Thanks for answering! The led that I want to stop when the internet connection failed is the led_placa, I understand Pete, your point of view about the flashes … but I have it with other teams with that logic, the flash is working, if the flash is off, it’s not is working, is this case that you recommend?

Pete.