Compilation error: no matching function for call to 'LiquidCrystal_I2C::LiquidCrystal_I2C(int, int, int, int, int, int, int, int)'

kampaw · March 16, 2024, 7:25pm

What did I do wrong? Will you help?

#include <Keypad.h>
#include <virtuabotixRTC.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

#define I2C_ADDR 0x27 //LCD i2c stuff
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
#define REST      0

LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
virtuabotixRTC myRTC(2, 3, 4);
DHT dht(A0, DHT11);

const byte numRows= 4;
const byte numCols= 4; 

char keymap[numRows][numCols]= 
{
{'1', '2', '3', 'A'}, 
{'4', '5', '6', 'B'}, 
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};

byte rowPins[numRows] = {12,11,10,9};
byte colPins[numCols]= {8,7,6,5};

int i1,i2,i3,i4;
char c1,c2,c3,c4;
char keypressed,keypressedx;

int A_hour=NULL;
int A_minute=NULL;
int AlarmIsActive=NULL;
int buzzer = 13;
int tempo = 120;
int melody[] = {
  NOTE_A4,-4, NOTE_A4,-4, NOTE_A4,16, NOTE_A4,16, NOTE_A4,16, NOTE_A4,16, NOTE_F4,8, REST,8,
  NOTE_A4,-4, NOTE_A4,-4, NOTE_A4,16, NOTE_A4,16, NOTE_A4,16, NOTE_A4,16, NOTE_F4,8, REST,8,
  NOTE_A4,4, NOTE_A4,4, NOTE_A4,4, NOTE_F4,-8, NOTE_C5,16,

  NOTE_A4,4, NOTE_F4,-8, NOTE_C5,16, NOTE_A4,2,//4
  NOTE_E5,4, NOTE_E5,4, NOTE_E5,4, NOTE_F5,-8, NOTE_C5,16,
  NOTE_A4,4, NOTE_F4,-8, NOTE_C5,16, NOTE_A4,2,
  
  NOTE_A5,4, NOTE_A4,-8, NOTE_A4,16, NOTE_A5,4, NOTE_GS5,-8, NOTE_G5,16, //7 
  NOTE_DS5,16, NOTE_D5,16, NOTE_DS5,8, REST,8, NOTE_A4,8, NOTE_DS5,4, NOTE_D5,-8, NOTE_CS5,16,

  NOTE_C5,16, NOTE_B4,16, NOTE_C5,16, REST,8, NOTE_F4,8, NOTE_GS4,4, NOTE_F4,-8, NOTE_A4,-16,//9
  NOTE_C5,4, NOTE_A4,-8, NOTE_C5,16, NOTE_E5,2,

  NOTE_A5,4, NOTE_A4,-8, NOTE_A4,16, NOTE_A5,4, NOTE_GS5,-8, NOTE_G5,16, //7 
  NOTE_DS5,16, NOTE_D5,16, NOTE_DS5,8, REST,8, NOTE_A4,8, NOTE_DS5,4, NOTE_D5,-8, NOTE_CS5,16,

  NOTE_C5,16, NOTE_B4,16, NOTE_C5,16, REST,8, NOTE_F4,8, NOTE_GS4,4, NOTE_F4,-8, NOTE_A4,-16,//9
  NOTE_A4,4, NOTE_F4,-8, NOTE_C5,16, NOTE_A4,2,
  
};
int notes = sizeof(melody) / sizeof(melody[0]) / 2;
int wholenote = (60000 * 4) / tempo;
int divider = 0, noteDuration = 0;
int temp;
int humidity;

Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols);

void setup() {
  pinMode(A0,OUTPUT);
  Temperatura();
  Serial.begin(9600);
  lcd.begin (16,2);
  lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
  lcd.setBacklight(HIGH);
  lcd.home ();
                                                   
}

void StarWars() {
  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

    divider = melody[thisNote + 1];
    if (divider > 0) {
      noteDuration = (wholenote) / divider;
    } else if (divider < 0) {
      noteDuration = (wholenote) / abs(divider);
      noteDuration *= 1.5;
    }

    tone(buzzer, melody[thisNote], noteDuration*0.9);
    delay(noteDuration);    
    noTone(buzzer);
  }
}

void Temperatura() {
  dht.begin();
  lcd.init();
  lcd.backlight();
  }

void loop() {
  digitalWrite(A0,HIGH); 
  delay(2000);
  temp = dht.readTemperature();
  humidity = dht.readHumidity();
  lcd.setCursor(1,0);
  lcd.print("Temp:");
  lcd.print(temp);
  lcd.print("C");
  lcd.setCursor(1, 1);
  lcd.print("Wilg:");
  lcd.print(humidity);
  lcd.print("%");

  while(keypressed == NO_KEY){ 
  keypressed = myKeypad.getKey();
  lcd.clear(); //Here after clearing the LCD we take the time from the module and print it on the screen with usual LCD functions
  myRTC.updateTime();

  if(myRTC.hours==A_hour && myRTC.minutes==A_minute && AlarmIsActive==1 && myRTC.seconds >= 0 && myRTC.seconds <= 2){
    while(keypressedx == NO_KEY){
    StarWars();
    lcd.clear();
    lcd.print("Wstawaj!");
    keypressedx = myKeypad.getKey();
    }
  }
  keypressedx = NO_KEY;
  noTone(buzzer);
  lcd.setCursor(0,0);
  lcd.print(myRTC.dayofmonth);
  lcd.print("/");
  lcd.print(myRTC.month);
  lcd.print("/");
  lcd.print(myRTC.year);
  lcd.setCursor(0,1);
  lcd.print(myRTC.hours);
  lcd.print(":");
  lcd.print(myRTC.minutes);
  lcd.print(":");
  lcd.print(myRTC.seconds);
  delay(100);
  }
 

         if (keypressed == '*') //As we everytime check the key pressed we only proceed to setup if we press "*"
             {
              lcd.clear();
              lcd.print("     Setup");
             delay(1000);
              lcd.clear();
              lcd.print("Setup year");
                 char keypressed2 = myKeypad.waitForKey();  
                    if (keypressed2 != NO_KEY && keypressed2 !='*' && keypressed2 !='#' && keypressed2 !='A' && keypressed2 !='B' && keypressed2 !='C' && keypressed2 !='D' )
                      {
                       c1 = keypressed2;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                 char      keypressed3 = myKeypad.waitForKey();
                    if (keypressed3 != NO_KEY && keypressed3 !='*' && keypressed3 !='#' && keypressed3 !='A' && keypressed3 !='B' && keypressed3 !='C' && keypressed3 !='D' )
                      {
                       c2 = keypressed3;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }
                   char  keypressed4 = myKeypad.waitForKey();
                   if (keypressed4 != NO_KEY && keypressed4 !='*' && keypressed4 !='#' && keypressed4 !='A' && keypressed4 !='B' && keypressed4 !='C' && keypressed4 !='D' )
                      {
                       c3 = keypressed4;
                       lcd.setCursor(2, 1);
                       lcd.print(c3);
                       }
                   char   keypressed5 = myKeypad.waitForKey();
                   if (keypressed5 != NO_KEY && keypressed5 !='*' && keypressed5 !='#' && keypressed5 !='A' && keypressed5 !='B' && keypressed5 !='C' && keypressed5 !='D' )
                      {
                       c4 = keypressed5;
                       lcd.setCursor(3, 1);
                       lcd.print(c4);
                       }

                     i1=(c1-48)*1000;        //the keys pressed are stored into chars I convert them to int then i did some multiplication to get the code as an int of xxxx
                     i2=(c2-48)*100;
                     i3=(c3-48)*10;
                     i4=c4-48;
                     int N_year=i1+i2+i3+i4;
                   delay(500);
                     lcd.clear();
                     lcd.print("Setup month");

////////////////////////////////////////////////////////////////
                     char keypressed6 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed6 != NO_KEY && keypressed6 !='*' && keypressed6 !='#' && keypressed6 !='A' && keypressed6 !='B' && keypressed6 !='C' && keypressed6 !='D' )
                      {
                       c1 = keypressed6;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                    char   keypressed7 = myKeypad.waitForKey();
                    if (keypressed7 != NO_KEY && keypressed7 !='*' && keypressed7 !='#' && keypressed7 !='A' && keypressed7 !='B' && keypressed7 !='C' && keypressed7 !='D' )
                      {
                       c2 = keypressed7;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                    int N_month=i1+i2;
                     delay(500);

                     lcd.clear();
                     lcd.print("Setup Day");
                     
 ////////////////////////////////////////////////////////////////                    
                      char keypressed8 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed8 != NO_KEY && keypressed8 !='*' && keypressed8 !='#' && keypressed8 !='A' && keypressed8 !='B' && keypressed8 !='C' && keypressed8 !='D' )
                      {
                        c1 = keypressed8;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                      char keypressed9 = myKeypad.waitForKey();
                    if (keypressed9 != NO_KEY && keypressed9 !='*' && keypressed9 !='#' && keypressed9 !='A' && keypressed9 !='B' && keypressed9 !='C' && keypressed9 !='D' )
                      {
                        c2 = keypressed9;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                    int N_day=i1+i2;
                    delay(500);
                     lcd.clear();
                     lcd.print("Ustaw godzinę");
////////////////////////////////////////////////////////////////////////////////////:                     
                     char keypressed10 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed10 != NO_KEY && keypressed10 !='*' && keypressed10 !='#' && keypressed10 !='A' && keypressed10 !='B' && keypressed10 !='C' && keypressed10 !='D' )
                      {
                       c1 = keypressed10;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                    char   keypressed11 = myKeypad.waitForKey();
                    if (keypressed11 != NO_KEY && keypressed11 !='*' && keypressed11 !='#' && keypressed11 !='A' && keypressed11 !='B' && keypressed11 !='C' && keypressed11 !='D' )
                      {
                        c2 = keypressed11;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                    int N_hour=i1+i2;
                    delay(500);
                     lcd.clear();
                     lcd.print("Ustaw Minuty");
////////////////////////////////////////////////////////////////////////////////////:
                    char keypressed12 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed12 != NO_KEY && keypressed12 !='*' && keypressed12 !='#' && keypressed12 !='A' && keypressed12 !='B' && keypressed12 !='C' && keypressed12 !='D' )
                      {
                        c1 = keypressed12;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                   char    keypressed13 = myKeypad.waitForKey();
                    if (keypressed13 != NO_KEY && keypressed13 !='*' && keypressed13 !='#' && keypressed13 !='A' && keypressed13 !='B' && keypressed13 !='C' && keypressed13 !='D' )
                      {
                        c2 = keypressed13;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                    int N_minutes=i1+i2;
                    delay(500);
                     lcd.clear();

                    myRTC.setDS1302Time(22, N_minutes, N_hour, 1, N_day, N_month, N_year); //once we're done setting the date and time we transfer to values to the RTC module
                                                                                           //the 22 stands for seconds you can add a setup for it too if you want
                                                                                           //the 1 stands for day of the week, as long I don't show it on the screen I don't change it
                    keypressed=NO_KEY; //the "*" key is stored in "keypressed" so I remove that value from it otherwise it will get me in the setup again
              }
/////////////////////////////////////////Alarme setup/////////////////////////////////
              
             if (keypressed == 'A'){
              lcd.clear();
              lcd.print("  Alarm setup  ");
              delay(1000);
              lcd.clear();
              lcd.print("Set alarm hour");
               
               char keypressed14 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed14 != NO_KEY && keypressed14 !='*' && keypressed14 !='#' && keypressed14 !='A' && keypressed14 !='B' && keypressed14 !='C' && keypressed14 !='D' )
                      {
                       c1 = keypressed14;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                    char   keypressed15 = myKeypad.waitForKey();
                    if (keypressed15 != NO_KEY && keypressed15 !='*' && keypressed15 !='#' && keypressed15 !='A' && keypressed15 !='B' && keypressed15 !='C' && keypressed15 !='D' )
                      {
                        c2 = keypressed15;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                     A_hour=i1+i2;
                    delay(500);
                     lcd.clear();
                     lcd.print("Set alarm minutes");
                      char keypressed16 = myKeypad.waitForKey();  // here all programs are stopped until you enter the four digits then it gets compared to the code above
                    if (keypressed16 != NO_KEY && keypressed16 !='*' && keypressed16 !='#' && keypressed16 !='A' && keypressed16 !='B' && keypressed16 !='C' && keypressed16 !='D' )
                      {
                       c1 = keypressed16;
                       lcd.setCursor(0, 1);
                       lcd.print(c1);
                       }
                    char   keypressed17 = myKeypad.waitForKey();
                    if (keypressed17 != NO_KEY && keypressed17 !='*' && keypressed17 !='#' && keypressed17 !='A' && keypressed17 !='B' && keypressed17 !='C' && keypressed17 !='D' )
                      {
                        c2 = keypressed17;
                       lcd.setCursor(1, 1);
                       lcd.print(c2);
                       }


                     i1=(c1-48)*10;
                     i2=c2-48;
                     A_minute=i1+i2;
                    delay(500);
                     lcd.clear();
                      AlarmIsActive=1;
                      keypressed=NO_KEY;
             }
             if (keypressed == 'B')
             {
              lcd.clear();
              lcd.print("Alarm deactivated");
              AlarmIsActive=0;
              keypressed=NO_KEY;
              delay(500);
             }
             else {
              myRTC.updateTime();
              keypressed=NO_KEY;
             }
             

}

oldcurmudgeon · March 16, 2024, 7:34pm

I have no idea what version of LiquidCrystal_I2C.h you have. The library one only specifies the I2C address, number of rows and number of col on the constructor.

LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);

So there is no matching constructor to match what you coded - hence the error message.

EDIT
There may be other variants that allow specification of I2C mapping but you don't have one.

J-M-L · March 16, 2024, 9:12pm

when you pass all those pins it's not an I2C LCD.. seems there is some confusion (chatGPT code? )

probably just one of the plain LiquidCrystal library needed

try with LiquidCrystal - Arduino Reference

can you clarify which LCD you have?

david_2018 · March 16, 2024, 10:30pm

There are some libraries that let you specify the pin connections between an I2C expander (such as the PCF8574) and an LCD display. The pin numbers refer to the I/O pins of the I2C expander, not the pins of the Arduino board. Unfortunately I am not able to identify the correct library for that code, might help if we knew the source of the code, the virtuabotixRTC library is also a bit unusual.

J-M-L · March 16, 2024, 11:10pm

OK
Never seen one like that

sterretje · March 17, 2024, 7:04am

The root cause is explained in reply #2 by @oldcurmudgeon.

You will have to look at the examples of the LiquidCrystal_I2C library that you have installed to see how to use it and next adjust your code to match it.

You don't spend enough time on the forum

J-M-L · March 17, 2024, 7:06am

probably
(or never cared enough about LCD without the I2C expander already mounted and ready to roll)

groundFungus · March 17, 2024, 7:20am

The hd44880 library will automatically determine the I2C address and LCD to I2C pin mapping. Install the library using the IDE's library manager.

kampaw · March 17, 2024, 8:43am

there is all error message

C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:106:80: error: no matching function for call to 'LiquidCrystal_I2C::LiquidCrystal_I2C(int, int, int, int, int, int, int, int)'
 LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
                                                                                ^
In file included from C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:3:0:
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:57:3: note: candidate: LiquidCrystal_I2C::LiquidCrystal_I2C(uint8_t, uint8_t, uint8_t)
   LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);
   ^~~~~~~~~~~~~~~~~
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:57:3: note:   candidate expects 3 arguments, 8 provided
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:55:7: note: candidate: constexpr LiquidCrystal_I2C::LiquidCrystal_I2C(const LiquidCrystal_I2C&)
 class LiquidCrystal_I2C : public Print {
       ^~~~~~~~~~~~~~~~~
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:55:7: note:   candidate expects 1 argument, 8 provided
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:55:7: note: candidate: constexpr LiquidCrystal_I2C::LiquidCrystal_I2C(LiquidCrystal_I2C&&)
D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C/LiquidCrystal_I2C.h:55:7: note:   candidate expects 1 argument, 8 provided
C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino: In function 'void setup()':
C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:168:7: error: 'class LiquidCrystal_I2C' has no member named 'setBacklightPin'; did you mean 'setBacklight'?
   lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
       ^~~~~~~~~~~~~~~
       setBacklight
C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:168:37: error: 'POSITIVE' was not declared in this scope
   lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
                                     ^~~~~~~~
Znaleziono wiele bibliotek w "LiquidCrystal_I2C.h"
  Wykorzystane: D:\Users\Kamil\Documents\Arduino\libraries\LiquidCrystal_I2C
  Niewykorzystane: D:\Users\Kamil\Documents\Arduino\libraries\Newliquidcrystal_1.3.5
exit status 1

Compilation error: no matching function for call to 'LiquidCrystal_I2C::LiquidCrystal_I2C(int, int, int, int, int, int, int, int)'

kampaw · March 17, 2024, 8:43am

not working

kampaw · March 17, 2024, 8:47am

i download it.Now I have something like this

C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino: In function 'void Temperatura()':
C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:193:12: error: 'int LiquidCrystal_I2C::init()' is private within this context
   lcd.init();
            ^
In file included from C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:3:0:
D:\Users\Kamil\Documents\Arduino\libraries\Newliquidcrystal_1.3.5/LiquidCrystal_I2C.h:154:9: note: declared private here
    int  init();
         ^~~~

exit status 1

Compilation error: 'int LiquidCrystal_I2C::init()' is private within this context

J-M-L · March 17, 2024, 10:00am

Can you share a link to your display and a picture?

kampaw · March 17, 2024, 10:11am

now I have smth like these

C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino: In function 'void Temperatura()':
C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:193:12: error: 'int LiquidCrystal_I2C::init()' is private within this context
   lcd.init();
            ^
In file included from C:\Users\Kamil\Desktop\PROGRAMOWANIe.pl\dalej\dalej.ino:3:0:
D:\Users\Kamil\Documents\Arduino\libraries\Newliquidcrystal_1.3.5/LiquidCrystal_I2C.h:154:9: note: declared private here
    int  init();
         ^~~~

exit status 1

Compilation error: 'int LiquidCrystal_I2C::init()' is private within this context

kampaw · March 17, 2024, 10:16am

J-M-L · March 17, 2024, 10:56am

a picture of your set up I meant.

did you solder the I2C module to your LCD1602?

kampaw · March 17, 2024, 11:07am

Yes, i solder it.

UKHeliBob · March 17, 2024, 11:08am

When replying, please be aware of this topic

kampaw · March 17, 2024, 11:11am

so I have to make a new topic?

UKHeliBob · March 17, 2024, 11:20am

NO !

In fact, your problems with LiquidCrystal_I2C would be better in a single topic

I have resisted the temptation to merge them so far as merging 2 fairly long topics can make the combined one very difficult to follow

Have you got the basic sketch from the LCD tutorial video working with the library that was used in the video ?

kampaw · March 17, 2024, 11:24am

This one?

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Compilation error: no matching function for call to 'LiquidCrystal_I2C::LiquidCrystal_I2C(int, int, int, int, int, int, int, int)'

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