Basic: This code is not working

Projects Programming
1

Using this code, ...

#include <Wire.h>   //i2c interface
#include <LiquidCrystal_I2C.h>; 
LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
lcd.init(0,0));
lcd.backlight();
lcd.setCursor(0,0);
lcd.print("Welcome, Blah, Blah Blah");
lcd.setCursor(0,1);
lcd.print("to the 16x2 LCD Screen");
}

void loop() {
  // put your main code here, to run repeatedly:
lcd.setCursor(16,2);
lcd.autoscroll();
lcd.println(" ");
delay(700);
}

I get...

WARNING: library LiquidCrystal I2C claims to run on avr architecture(s) and may be incompatible with your current board which runs on esp8266 architecture(s).
C:\Users\DELL\Documents\Arduino\_led_16x21_sketch_jul21a\_led_16x21_sketch_jul21a.ino: In function 'void setup()':
C:\Users\DELL\Documents\Arduino\_led_16x21_sketch_jul21a\_led_16x21_sketch_jul21a.ino:6:13: error: no matching function for call to 'LiquidCrystal_I2C::init(int, int)'
    6 | lcd.init(0,0));
      |             ^
In file included from C:\Users\DELL\Documents\Arduino\_led_16x21_sketch_jul21a\_led_16x21_sketch_jul21a.ino:2:
C:\Users\DELL\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:87:8: note: candidate: 'void LiquidCrystal_I2C::init()'
   87 |   void init();
      |        ^~~~
C:\Users\DELL\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:87:8: note:   candidate expects 0 arguments, 2 provided
Multiple libraries were found for "LiquidCrystal_I2C.h"
  Used: C:\Users\DELL\Documents\Arduino\libraries\LiquidCrystal_I2C
  Not used: C:\Users\DELL\Documents\Arduino\libraries\LiquidCrystal_I2C-master
exit status 1

Compilation error: no matching function for call to 'LiquidCrystal_I2C::init(int, int)'
2 
lcd.init(0,0));

Leaving aside the wrong number of brackets, what are the 2 parameters to this function ?

I suspect that the code you are using was not written for the library you are using

1 Like
3

When you install a library, look at the examples. They should be your guide line for your own code.

There are a millionLiquidCrystal_I2C libraries; which one did you install?

1 Like
4

I don't know, I struggle with coding (understatement)

I just went to ''include library'' and installed the 1st. one that matched exactly.

5

The compiler is giving you lots of helpful messages.
The simplest approach is to start with the first message, and work your way down.`

And then there is

As others have pointed out, look for the correct number of parameters, best done by looking at an example in your version of the library
`

1 Like
6

How do I do that? tried right click...

7

It will depend on where your library is located.
If it is on github, there will usually be a folder called examples.

Even easier in the Arduino IDE:
File/Examples
There will be examples from Built in and Custom libraries

1 Like
8

The very first warning is a big red flag that should grab your attention:

WARNING: library LiquidCrystal I2C claims to run on avr architecture(s) and may be incompatible with your current board which runs on esp8266 architecture(s).

1 Like
9

Did you install it using the Library Manager?

10

Yes.
Thanks to everybody for the help, but I think I will just give up on LCD Screens.

11

Remove the semicolon.

12

What Arduino controller are you using?

Tom... :smiley: :+1: :coffee: :australia:
PS. Should have been the first question.

13

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