没有匹配的 function 调用 'LiquidCrystal::write(String&)'

Question

void printOnLcd(String s){
  for (int i =0; i<2; i++){ 
    if( i % 2 == 0){ 
         for(int a=0; a<16; a++){ 
             lcd.setCursor(a,i);
             lcd.write(s);
             delay(200); 
             lcd.setCursor(a,i);
             lcd.write(" ");
         }
    } else {
       for(int a = 0; a<16; a++){
           lcd.setCursor(a,i);
           lcd.write(s);
           delay(200);
           lcd.setCursor(a,i);
           lcd.write(" ");
       }
    }
}

Arduino gives me the problem: no matching function for call to 'LiquidCrystal::write(String&)' Can't I put a string on the screen? what's the problem? I encountered this problem a few days ago and now I don't have a chance to look for a possible solution.

Answer 1

now I don't have a chance to look for a possible solution.

Open a webbrowser, enter www.google.com , enter "Arduino LiquidCrystal", click the first hit:

https://www.arduino.cc/en/Reference/LiquidCrystal < the Arduino manual btw. Read it!

You're trying to use LiquidCrystal.write, so click write and read.

Syntax

lcd.write(data)

data: the character to write to the display

So obviously you can only use this function to print a single character.

Now check wether there is another function that allows you to write a string.

The next function in the list is print

Sounds good, let's click that and read.

Syntax

lcd.print(data) data: the data to print (char, byte, int, long, or string )

Hey this allows us to display a string!

Try it out lcd.print(s);

Alternatively click any of the many examples. Most of them use print.