Hi everyone I am beginning learn coding and the second language English. I have small project I use Arduino uno , esp8266 , dht11 , lcd I2C and use blynk app in my project I have the code and work probably when WiFi ON but I have question How I can get the information data from dht to lcd without open the WiFi. Now I get information ( Temp and humidity ) on LCD when WiFi ON only. How I can make Temp and humidity display on LCD with and without WiFi.

#include <BlynkSimpleShieldEsp8266.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 20, 4);
char auth[] = "*******************************";
char ssid[] = "***********";
char pass[] = "*********";
#include <SoftwareSerial.h>
SoftwareSerial EspSerial(2, 3); // TX, RX
#define ESP8266_BAUD 9600
ESP8266 wifi(&EspSerial);
#define DHTPIN 8
#define DHTTYPE DHT22

void setup()
  Blynk.begin(auth, wifi, ssid, pass);

void loop()
  int h = dht.readHumidity();
  int t = dht.readTemperature();
  Blynk.virtualWrite(V1, t);
  Blynk.virtualWrite(V2, h);
void LCD()
  int h = dht.readHumidity();
  int t = dht.readTemperature();
  lcd.setCursor(0, 0);
  lcd.print(" ******************");
  lcd.setCursor(3, 1);
  lcd.print("TEMP: ");
  lcd.setCursor(3, 2);
  lcd.print("HUM : ");
  • 1
    you just read the tenperarure and humidity and then display the values on the lcd ... why would you need wifi?
    – jsotola
    Jul 18 '20 at 12:28
  • because use as IOT by Blynk
    – AbuWeSaM
    Jul 18 '20 at 12:43
  • So take the code that writes to the lcd out of the function that is called by your timer and simply call it from loop. Use the blink without delay style of timing with millis to make it happen at one second intervals. There are thousands of tutorials on how to handle timing on Arduino without blynk.
    – Delta_G
    Jul 18 '20 at 13:44
  • Thanks dear,,, You can help me more for this because I don't have idea
    – AbuWeSaM
    Jul 18 '20 at 15:30
  • Start with a simple example that just prints the values from the DHT11 and work your way up from there. The code you included does some very strange and unnecessary things and I do not recommend you re-use it. Where did this code come from?
    – StarCat
    Jul 18 '20 at 20:39

Blynk.connected() returns true when hardware is connected to Blynk Server, so you can guard Blynk code with

if( Blynk.connected() ){
  // do Blynk things here

// Update the LCD anywhere outside of the above "if" statement.

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