LCD based on Hitachi HD44780 - strange behavior

Other Hardware Displays
3

Good Morning Don,

I've followed your advice:

  1. I've changed the ping int his way :
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

  1. I've correct with this lcd.println() function (sorry but I was too tired :wink: I was also read that into the first post but after I've tried everything ...

  2. I've removed clear , What I can use in order to clean up the screen ? is enough Lcd.nodisplay() ?

I've modify the code in this way :

           lcd.display();
           lcd.print("Dev 1 is ON");  
           lcd.noDisplay();

This code is call in if option ... what is see is that ... the program pass for the if option do the fact execute also the "Serial.print" instruction that is after the lcd code but doesn't appear nothing ? How I can do ?

So, I've tried also just entry into the loop to put this ;

void loop()
{
  
           lcd.display();
           lcd.print("test 1");  
           lcd.noDisplay();
           delay(1000);
// After the software do something is button is pressed ...

So, should be execute,but is see nothing ....
Thanks for your help,
Andrea