Connecting to Blynk cloud problem

Greetings

The board I use is Linknode D1 and connect to Blynk with ESP8266

I’m doing a project : flower planting

and have DHT11 and other sensors

the problem is I can connect to the Blynk cloud

but once I open the Blynk app the device will be online a while

then it will offline and online again and again

I don’t know how to solve this problem

here is my code and screen shots



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

#include "DHT.h"
#define DHTPIN D8
#define DHTTYPE DHT11

char auth[] = "1c5f028a0ec04036be337b26xxxxxxxx";

//wifi
char ssid[] = "xxx";
char pass[] = "xxx";

DHT dht(DHTPIN, DHTTYPE);

int moistureSensor = A0;
void setup()
{

Serial.begin(9600);
pinMode (D11, OUTPUT);

Blynk.begin(auth, ssid, pass);


}

void loop()
{

Blynk.run();

delay(1000);

float h = dht.readHumidity();

float t = dht.readTemperature();


if (isnan(h) || isnan(t) ) {
  Serial.println("Failed to read from DHT sensor!");
  return;  
}

Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" ");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");

//soil humidity
Serial.print("土壤溼度值: ");
int k = analogRead(A0);
Serial.println(k);
delay(1000);
//relay
if (k > 700)
{
digitalWrite(D11, LOW); 
}
if (k < 600)
{ 
digitalWrite(D11, HIGH); 
}



Blynk.virtualWrite(V1, h); 
Blynk.virtualWrite(V2, t); 
Blynk.virtualWrite(V3, k); 


}

See the PUSH_DATA example to create a loop() with 2 lines of code.

OK Thanks !! I’ll try it