Device offline of the app after the first time of working

Solved
1

Hello, I am doing my first project with Blynk, it is to move a servo motor and when it moves I send an email and a notification to my cell phone, at the beginning it works and then I get message in the application that the device is offline and it keeps happening while the program is running.

I’ve been trying to solve this for a long time and I do not succeed, I work with a LoLin NodeMCU which is an ESP8266, which connects to a WiFi network and my cell phone connected to the data network, im using the Arduino IDE and a LCD.

If someone can help me, please, thank you.

The code is this:

#define BLYNK_PRINT Serial    //Comente esto para desactivar impresiones y ahorrar espacio

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

LiquidCrystal lcd(5,4,0,2,14,12);     //Pin LCD: 4-RS, 6-ENABLE, 11-D4, 12-D5, 13-D6, 14-D7)... (1,3,5- GND, 2-Vcc, );
Servo servo;  //cafe - GND, rojo - 5V, amarillo - PIN(3)

int pos = 0;   //Posicion del servo
long tiempoEntre = 10000; //10000 ms hours between feeding
long tiempoFinal; 
long tiempoActual;
int cont = 0;
bool aux = true;

byte pez[8]{
B00000,
B00000,
B00000,
B10110,
B01111,
B10110,
B00000,
};

byte pez1[8]{
B10110,
B01111,
B10110,
B00000,
B00000,
B00000,
B00000,
};

byte pez2[8]{
B00000,
B00000,
B00000,
B10110,
B01111,
B10110,
B00000,
};

//Su authtoken generado por la aplicacion Blynk
char auth[] = "6454ff8067274e8a8e8403a415a8eddd";

//Datos para la conexion de Red Wifi.
char ssid[] = "wl-fmat-ccei-b"; //Nombre de la red WIFI
char pass[] = ""; //contraseña de la red WIFI

//--------------------------------------------------------------------------------

void setup() {
    Serial.println("---- 1----");
  Serial.begin(9600);
    Serial.println("---- 2 ----");
  servo.attach(3); //GPIO10, SD3
  lcd.begin(16, 2);
  lcd.clear();
  
  lcd.createChar(1,pez);
  lcd.createChar(2,pez1);
  lcd.createChar(3,pez2);
  Serial.println("---- Antes ----");
  Blynk.begin(auth, ssid, pass);
    Serial.println("---- Despues ----");

  // Envia correo electrónico cuando el hardware se conecte al servidor de Blynk
  //Parametros por defecto: "Correo electronico", "Asunto", "Mensaje a enviar"
  
  Blynk.email("andrea.ortiz.pavon@gmail.com","INICIO FOODFISH", "Se ha alimentado a los peces :)");
  
  //pinMode(5, INPUT);// pin D1(GPIO5) como entrada del sensor
  pinMode(13,OUTPUT);// pin D7(GPIO13) como Salida LED Rojo
    pinMode(15,OUTPUT);// pin D8(GPIO15) como Salida LED Verde
  
}

//--------------------------------------------------------------------------------

void loop() {

  
  FoodFish();
  Alarma(aux);// llama a ejecutar la funcion
  aux = true;
  Blynk.run();
  
}


void FoodFish(){
  Serial.println();
  Serial.println("---- Iniciamos ----");
  Blynk.notify("INICIAMOS");
  
  lcd.setCursor(2,0);
  lcd.print("FOODFISH ");
  
  lcd.setCursor(12,0);
  lcd.write(1);
  lcd.setCursor(13,0);
  lcd.write(2);
  lcd.setCursor(14,0);
  lcd.write(3);
  
  lcd.setCursor(0,1);
  lcd.print("No. de veces: ");
  Serial.println("-----------NO. VECES");
  
  tiempoActual = millis();
  
      Serial.print("Tiempo actual: ");
      Serial.println(tiempoActual/1000);
      
      Serial.print("* Tiempo entre: ");
      Serial.println(tiempoEntre/1000);
      
  tiempoFinal = tiempoActual + tiempoEntre;
  
      Serial.print("-> Tiempo final: ");
      Serial.println(tiempoFinal/1000);
  
  while(tiempoActual < tiempoFinal) {
   servo.write(0);
   delay(1000);
   tiempoActual = millis();  
  }
  
       Serial.print("Tiempo actual: "); 
       Serial.println(tiempoActual/1000);
  
  for(pos = 0; pos < 180; pos += 1) { // goes from 0 degrees to 180 degrees 
                                     // in steps of 1 degree 
    servo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(15);                       // waits 15ms for the servo to reach the position 
  Serial.println(".....MOVIO 1");
  } 
  
       Serial.print("Tiempo actual: "); 
       Serial.println(tiempoActual/1000);
  
  for(pos = 180; pos>=1; pos-=1)  {   // goes from 180 degrees to 0 degrees                                
    servo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(15); 
    Serial.println(".....MOVIO 2"); // waits 15ms for the servo to reach the position 
  } 

  cont = cont + 1;
  digitalWrite(13,HIGH);
  delay(3000);
  digitalWrite(13,LOW);
  Serial.println();
  Serial.print("No. de veces: ");
  Serial.println(cont);

  lcd.setCursor(14,1);   //1 es la segunda linea
  lcd.print(cont);
}

void Alarma(bool aux){
  // si la alarma se activa este envia un correo y espera 15 segundos.

  if (aux == true) // si aux es true
  {
    Serial.println("Alarma Activada"); //Imprime por el monitor serial
     Blynk.email("andrea.ortiz.pavon@gmail.com","FOODFISH", "Se ha alimentado a los peces :)");
      Blynk.notify("SE ALIMENTO");
    delay(200);
  }

  aux = false;
2

@AndreaOrtiz go back and edit your sketch section post with backticks so we can read it.

Suggest you study PUSH DATA example very closely and look to have just 2 lines of code in loop() until you become an experienced Blynker. Also try the simple stuff first.

3

I modified it, i hope it gets better, i’m new here :frowning: the Loop looks better

At first it works correctly, but then the device disconnects in the app.

This is when the first time works, the end of the code:

image

Then, the second time i got this, when its stop working:

image

4

loop() needs to use Blynk timer to call your functions like the PUSH DATA example

5

I do not understand why I need that function, I already implement it and I still have the error

6

Let’s just say Blynk sketches are not simply Arduino sketches. In Blynk we don’t use delay() we use the Blynk timer (known to Arduino users as Simple Timer).

7

Can you helpe me for that, im not sure where i need to put de Timer in the code :frowning:

8

Take a look how the timer is used in PUSH DATA at https://examples.blynk.cc/?board=ESP8266&shield=ESP8266%20WiFi&example=GettingStarted%2FPushData

9

Sorry, I’ve been reading it but I still do not understand what part of my code I should implement this, the function of the timer, since the delays I use is specifically for counting the feeding time for my fish (it’s a fish feeder my program), I do not understand how to implement it or in what way it would serve me :frowning:

10

You have at least one very long delay of 3000ms which is not acceptable for WiFi devices running Blynk.

If I were you I would run the PUSH DATA sketch before trying servos etc.

11

After playing with that code, i finally did what i want it, really thank you very much for your help :smiley:

The code for my fish feeder is this:

//-----------------------------------------------------------------------------------------------------------------------
//  Autora: Andrea E. Ortiz Pavón
//  Alimentador de peces automatico, el cual te manda una notificación a la aplicacion de Blynk cuando se alimenta
//
//   COMPONENTES:
//      - Display LCD
//      - Servo motor SG90
//      - NodeMCU LoLin (ESP8266)
//
//    El servo motor se mueve cada determinado tiempo para alimentar a los peces, al terminar los movimientos
//    se manda una noticiación por medio de la App de Blynk para avisar al usuario, tiene un widget en la app
//    donde te muestra el contador de las veces que se ha alimentado
//-----------------------------------------------------------------------------------------------------------------------

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <LiquidCrystal.h>
#include <Servo.h>

//-------------------------------------------------------------------------------------

byte pez[8]{
B00000,
B00000,
B00000,
B10110,
B01111,
B10110,
B00000,
};

byte pez1[8]{
B10110,
B01111,
B10110,
B00000,
B00000,
B00000,
B00000,
};

byte pez2[8]{
B00000,
B00000,
B00000,
B10110,
B01111,
B10110,
B00000,
};

LiquidCrystal lcd(5,4,0,2,14,12);     //Pin LCD: (4-RS, 6-ENABLE, 11-D4, 12-D5, 13-D6, 14-D7)... (1,3,5- GND, 2-Vcc, );
Servo servo;  //cafe - GND, rojo - 5V, amarillo - PIN(3)
BlynkTimer timer;

int pos = 0;   //Posicion del servo
int cont = 0;

char auth[] = "XXXXXXXXXXXXXXXXXXXXXXXXXXXX";
char ssid[] = "xxxxxxxxxxxxxxxxxxxx"; //Nombre de la red WIFI
char pass[] = "xxxxxxxxxxxxxxxxxxx"; //contraseña de la red WIFI

//-------------------------------------------------------------------------------------

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.

  void myTimerEvent(){
  
    Serial.println();
    Serial.println("---- Iniciamos ----");
    
    
    lcd.setCursor(2,0);
    lcd.print("FOODFISH ");
    
    lcd.setCursor(12,0);
    lcd.write(1);
    lcd.setCursor(13,0);
    lcd.write(2);
    lcd.setCursor(14,0);
    lcd.write(3);
    
    lcd.setCursor(0,1);
    lcd.print("No. de veces: ");

    servo.write(0);

    //----- Primer Movimiento
    for(pos = 0; pos < 180; pos += 1) {  // goes from 0 degrees to 180 degrees, in steps of 1 degree 
      servo.write(pos);                  // tell servo to go to position in variable 'pos' 
      delay(15);                         // waits 15ms for the servo to reach the position 
      Serial.println(".....MOVIO 1");
    } 

    //----- Segundo Movimiento
    for(pos = 180; pos>=1; pos-=1)  {   // goes from 180 degrees to 0 degrees, in steps of 1 degree                               
      servo.write(pos);                 // tell servo to go to position in variable 'pos' 
      delay(15);                        // waits 15ms for the servo to reach the position 
      Serial.println(".....MOVIO 2"); 
    } 
  
    cont = cont + 1;
    
    digitalWrite(13,HIGH);
    delay(3000);
    digitalWrite(13,LOW);
    
    Serial.println();
    Serial.print("No. de veces: ");
    Serial.println(cont);
  

    Blynk.notify("SE ALIMENTO");
    Blynk.virtualWrite(V5, cont);
  }

//-------------------------------------------------------------------------------------

  void setup(){
    
      Serial.begin(9600);
      servo.attach(3); //GPIO10, SD3
      
      lcd.begin(16, 2);
      lcd.clear();
      
      lcd.createChar(1,pez);
      lcd.createChar(2,pez1);
      lcd.createChar(3,pez2);
      
      Blynk.begin(auth, ssid, pass);
      Serial.println("---- Conectado!! ----");
  
      pinMode(13,OUTPUT);// pin D7(GPIO13) como Salida LED Rojo
      
    // Setup a function to be called every second, Call function f every d milliseconds. The callback function must be declared as void f()
    timer.setInterval(120000, myTimerEvent); //Cada 2 minutos se ejecute
  }

//-------------------------------------------------------------------------------------

  void loop(){
    lcd.setCursor(2,0);
    lcd.print("FOODFISH ");
    
    lcd.setCursor(12,0);
    lcd.write(1);
    lcd.setCursor(13,0);
    lcd.write(2);
    lcd.setCursor(14,0);
    lcd.write(3);
    
    lcd.setCursor(0,1);
    lcd.print("No. de veces: ");
    lcd.setCursor(14,1);   //1 es la segunda linea
    lcd.print(cont);

    Blynk.run();
    timer.run(); // Initiates BlynkTimer
  }