Effects not working with text longer that 16 char

[claudchtiscali]

/*
This code is not working, the line with effects overlaps at the begining of the line replicating one char
If I change the line fx.applyEffect(text, 11, 18, effect::invert); to fx.applyEffect(text, 11, 15, effect::invert); // bold "Hello"
it does not apply the desired effect but do not overlap

Did I make any mistake ?
*/

#include <Arduino.h>

#include <Wire.h>
#include <LiquidCrystal_PCF8574.h> // should work with any LCD library
LiquidCrystal_PCF8574 lcd(0x27);

void make_char(char c, uint8_t* image){ //need this function to pass to LcdEffects
lcd.createChar(c, image); // so it knows how to make custom characters
}

#include <LcdEffects.h> // the core library
#include <Effects.h> // a collection of common effects
LcdEffects<> fx(make_char); // initialize the LcdEffects library

void setup() {
lcd.begin(20, 4); //change to match the size of your LCD
lcd.setBacklight(255);
}
void loop() {
char text[] = "12345678901234567890"; // puts the text in an array so we can work with it
lcd.setCursor(0,0);
lcd.print(text); //print the text to the first line without any effects (for comparison)

fx.applyEffect(text, 0, 5, effect::invert);
fx.applyEffect(text, 7, 10, effect::bold);
fx.applyEffect(text, 11, 18, effect::invert);

lcd.setCursor(0,1); //now print the text to the second line
lcd.print(text);

delay(1000);
}

[mathertel]

I haven't used this library on my own but the examples of lcdeffects use my library. I just can guess that more than 16 characters cannot be used as the LCD chip only supports 16 customized characters.

[claudchtiscali]

It’s not as you guess because I can print correctly without effects in any part of my 20*4 LCD
I will investigate more within the code library