Reload only one variable in loop()

Question

I need some information for the TFT screen 2.8 and arduino mega. The screen works very well and displays the data. The small problem I encounter is for the text display, the page is reloading every second and this makes a small black screen every second. I would like to know if it was possible to reload only one part of the screen display?

See in video https://youtu.be/vxSa6xkH0vU

My loop()

void loop(void) {
 tft.fillScreen(BLACK);
 unsigned long start = micros();
 tft.setCursor(0, 0);
 tft.setRotation(3);
 dt = clock.getDateTime();
 clock.forceConversion();
 // Go 
 tft.println();
 tft.setTextColor(GREEN);
 tft.setTextSize(5);
 tft.println("Info");
 tft.println();
 tft.setTextSize(2);
 tft.println(clock.dateFormat("d-m-Y H:i:s", dt)); 
 tft.println();
 tft.setTextSize(2);
 tft.println("Temperature: ");
 tft.println(clock.readTemperature());
 delay(1000); 
}

• ratchet freak: Don't do a fillscreen when you don't need to.
• atmon3r: @ratchetfreak When i remove fillScreen this generates a dual display :/

Answer 1

You can use tft.rect(x,y,width,height) to clear only a portion of the screen. Make sure to set tft.fill before calling it.