keypad i2c

Projects Networking, Protocols, and Devices
1

Hello,
I have connected a 3*4 keypad using a pcf8754
I have installed both <Keypad_I2C.h> et <Keypad.h>
I try the example programm :

#include <Keypad_I2C.h>
#include <Keypad.h>
#include <Wire.h>
#define I2CADDR 0x22


const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
// Digitran keypad, bit numbers of PCF8574 i/o port
byte rowPins[ROWS] = {0, 1, 2, 3}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 5, 6}; //connect to the column pinouts of the keypad

Keypad_I2C kpd( makeKeymap(keys), rowPins, colPins, ROWS, COLS, I2CADDR);

void setup(){
  Wire.begin( );
  kpd.begin( makeKeymap(keys) );
  Serial.begin(9600);
  Serial.println( "start" );
}
void loop(){
  
  char key = kpd.getKey();
  
  if (key){
    Serial.println(key);
  }
}

but i receive this error message :
sketch_mar17a:19:72: error: no matching function for call to 'Keypad_I2C::Keypad_I2C(char*, byte [4], byte [3], const byte&, const byte&, int)'

2

Which Arduino board do you use and which Keypad libraries do you use. Can you give links to those libraries and tell how you have installed them ? If you have installed more than one of those libraries, then you better remove them and start all over. Start with a example that comes with that library.

3

i've just solved the problem :
i had installed twice arduino and one of the library folder was empty :o
thanks for help