When using millis() in Blynk everythings slows down

Need Help With My Project
1

Hi I am using Arduino nano to make on-line flower watering system.
When I run my code with out Blynk connecting to the server the millis() works fine! When I run it with the Blynk everyting slows down! I don´t want to use delay() what can I do to have accurate time?

Here is my code.

bool ResetTime = false;


int SensorPin_1 =  A1; // Pinni fyrir rakaskynjara er A1
float sensorValue_1 = 0; //Fasti fyrir rakaskynjara



int Snuningstakki = A0;  //Pinni fyrir stillanlegt viðnám
int lesa_takki_fasti;    //Fasti fyrir lestur á snúningstakka
int skrifa_takki_fasti;  //Fasti fyrir srif á snúningstakka

int Mosfet_pin = 5;     // Pinni 5 til að stýra mosfet (slökkva skynjara milli lesturs)
int Relay_pin = 8;      // Pinni til að stýra relay
int Relay_state =LOW;   //Fasti fyrir millis()vökvun

int Float_sensor = 7;   //Flot skynjari er skráður á pinna 7.
int Float_fasti = 0;    //Fasti fyrir flot skynjara

const int LED_RED = 2; //rauður
const int LED_BLUE = 4; //blár
const int LED_GREEN = 4; //grænn


int ledState = LOW;                  // Fasti fyrir blikk á LED peru
unsigned long previousTime_2 = 0;   // Fasti til að telja tíma fyrir peru
const long Led_blink_timi = 400;    // TÍMI BLIKKS ÞEGAR FORÐABÚR ER TÓMT



const unsigned long Sencor_lestur = 5000; 
unsigned long previousTime_1 = 0;

const unsigned long Vokvun_lestur = 21600000; 
unsigned long previousTime_3 = 0;
int Deala_vatni = 2000; 



#define BLYNK_PRINT Serial
#include <SPI.h>
#include <WiFiNINA.h>
#include <BlynkSimpleWiFiNINA.h>                                               

char auth[] = "LRCJewtdQZG7FfTXYL2fWpuQYGbPbQ4P";  // Auth Token kemur í email þegar búið er að búa til verkefni Blynk appinu.
//char ssid[] = "XXXXXX";  // ÞRÁÐLAUST NET HEITI
//char pass[] = "XXXXXXX";   //  ÞRÁÐLAUST NET LEYNIORÐ

WidgetLCD lcd(V2);


void setup() { 
  
  Serial.begin(9600);

 Blynk.begin(auth, ssid, pass);
  
  pinMode(Relay_pin, OUTPUT);
  pinMode(Mosfet_pin, OUTPUT);
  pinMode(SensorPin_1, INPUT);
  pinMode (Snuningstakki, INPUT);
  pinMode(Float_sensor,INPUT_PULLUP);
  pinMode (LED_BLUE,OUTPUT);
  pinMode (LED_RED,OUTPUT);
  pinMode (LED_GREEN,OUTPUT);
  digitalWrite(Relay_pin, LOW);
  digitalWrite(Mosfet_pin, HIGH);

}

void loop() {

Blynk.run();  //Keyra upp Blynk forrit


unsigned long currentTime = millis();  //Keyra upp millisekúndur og skýra "currentTime" TÍMAKLUKKA FORRITSINS.
  
lesa_takki_fasti = analogRead (Snuningstakki);
skrifa_takki_fasti = (5000./1023.) * lesa_takki_fasti;  // Lesa pot pinna og reikna yfir í gildi frá 0-1023 yfir í 255 analog Volt (0-5).
      
Serial.print ("Millisec ");       
Serial.println (currentTime);

 if (currentTime - previousTime_3 >= Vokvun_lestur) {

    while (millis() < currentTime + Deala_vatni) {

     digitalWrite(Relay_pin, HIGH);
      
    }
    
   previousTime_3 = currentTime;
  
   }
 
    if (currentTime - previousTime_1 >= Sencor_lestur) {

     digitalWrite(Mosfet_pin, LOW);
     digitalWrite (LED_GREEN, HIGH); 

    sensorValue_1 = ((analogRead(SensorPin_1)/1023.0)*500);

     Float_fasti = digitalRead (Float_sensor);
  
     Serial.print("Val_1 ");
     Serial.println(sensorValue_1);

      Serial.println(" ");
      
    //  delay(20);
    
    previousTime_1 = currentTime;
  
  }


  digitalWrite(Mosfet_pin, HIGH);
  digitalWrite (LED_GREEN, LOW);
  //delay(20);

/*
if (sensorValue_1 >= 250) 

{
  digitalWrite (Relay_pin, HIGH);
  delay (1000);
  digitalWrite (Relay_pin, LOW);
  delay (skrifa_takki_fasti);
}

else 
{
  digitalWrite (Relay_pin, LOW); 
}
*/

// Fylgjast með flotskynjara í vatnsforðabúinu ________________________________________________________________________

if (Float_fasti !=1) 

{
    if (currentTime - previousTime_2 >= Led_blink_timi) {
    // save the last time you blinked the LED
    previousTime_2 = currentTime;

    // if the LED is off turn it on and vice-versa:
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }

    // set the LED with the ledState of the variable:
    digitalWrite(LED_RED, ledState);
  } 
else 
  {
 
  digitalWrite (LED_RED, LOW); 


}
}

 Blynk.virtualWrite(V1,skrifa_takki_fasti); 

if (Float_fasti !=1) 
 {
lcd.clear();
lcd.print(1, 0, "VATN Á TANKIR"); 
 
 }

if (Float_fasti !=0);

 {
 lcd.clear();
 lcd.print(0, 0, "TANKUR AÐ TÆMAST");
 }

if (millis() > 3960000000)
 {
ResetTime = true;
}
if (millis() < 400 && ResetTime)

 {
previousTime_1 = 0;
previousTime_2  = 0;
previousTime_3  = 0;

ResetTime = false;

}

}
2

@VilliMagg 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:
```

Pete.

3

Thanks :wink:

4

You need to clear-out your void loop and get rid of the delays that you have, and start using BlynkTimer instead…

Pete.

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