LCD flickers

[markop]

Hello

Can you please tell me why in the program the LCD flickers

#define BLYNK_PRINT Serial


#include <SPI.h>
#include <Fishino.h>
#include <BlynkSimpleFishino.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "80a7c4faf7c4258";
WidgetLCD lcd(V0);
WidgetLED led0(V1);
WidgetLED led1(V2);
char ssid[] = "ich";
char pass[] = "98312623";
bool enableTimer = true;
bool enableTimer1 = true;
BLYNK_WRITE(V3)  // Timer enable/disable
{
  int setting = param.asInt();
  enableTimer = setting;

}
BLYNK_WRITE(V4)  // Timer enable/disable
{
  int setting = param.asInt();
  enableTimer1 = setting; 

}
void checkTimer()
{
  
  if((enableTimer == 1) && (enableTimer1 == 1))
{
    // Timer is running, so lights on!
    digitalWrite(6, HIGH);
    led0.on();
      led1.off();
      lcd.print (0,1,"LED ist ON");
      
     
  }
  else
  {
    lcd.clear();
    digitalWrite(6, LOW);
    led0.off();
      led1.on();
      lcd.print (0,1,"LED ist OFF");
     
      
  }
}

void setup()
{
  // Debug console
  Serial.begin(9600);
pinMode(6, OUTPUT);
lcd.print (0,0,"LED ist OFF");
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
  checkTimer();
}

[Blynk_Coeur]

1/ you have your checktimer in the main loop
better use blynk timer
2/ in your checktimer you have a lcd.clear.

[Gunner]

@markop As you are not new to this forum, you should remember to search this forum for past issues/solutions before posting questions…

Sever connection closing assuming to many requests

Also, if you don’t need to clear it every time, and rely on overwriting instead (padding with extra spaces if required) then you will have no flickering

Sending LCD Message one time

Hmm, a bit bigger script than I anticipated… lots of logic to go through, but I think I see a “flicker free” solution: Limit your lcd.clear(); commands only to places where you actually need a clear screen. Then, when overwriting a longer message with a shorter one, just add spaces to overwrite past characters. This will not limit the amount of lcd writes (that would probably require more counters, flags and if-then logic), but it will prevent the flicker. PS, I still had to edit your post t…

Not to mention Google… as this LCD “flickering” issue is exactly the same cause and solution with both the virtual and physical LCD.

How to Prevent LCD Flicker

[markop]

I’ve done it a little bit differently so it works without flickering

#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Fishino.h>
#include <BlynkSimpleFishino.h>
#include <TimeLib.h>
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "58";
WidgetLCD lcd(V0);
WidgetLED led0(V1);
WidgetLED led1(V2);
char ssid[] = "ich";
char pass[] = "3";
bool enableTimer = true;
bool enableTimer1 = true;
BlynkTimer timer;
BLYNK_WRITE(V3)  // Timer enable/disable
{
  int setting = param.asInt();
  enableTimer = setting;

}
BLYNK_WRITE(V4)  // Timer enable/disable
{
  int setting = param.asInt();
  enableTimer1 = setting; 

}
void checkTimer()
{
  
  if((enableTimer == 1) && (enableTimer1 == 1))
{
    // Timer is running, so lights on!
    digitalWrite(6, HIGH);
    led0.on();
      led1.off();
      lcd.print (0,1," LED ist ON ");
    
     
  }
  else
  {
   lcd.print (0,0,"LED Notschalter");
    digitalWrite(6, LOW);
    led0.off();
      led1.on();
      lcd.print (0,1," LED ist OFF");
     
      
  }
}

void setup()
{
  
  Serial.begin(9600);
pinMode(6, OUTPUT);
digitalWrite(6, LOW);
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
checkTimer();
}

[Blynk_Coeur]

@markop

void loop()
{
  Blynk.run();
checkTimer();
}

you will flood Blynk for sure