UID from MFRC522 Is Printing Wrong

supflynn · August 3, 2022, 12:38pm

This is my code.

#include <MFRC522v2.h>
#include <MFRC522DriverSPI.h>
#include <MFRC522DriverPinSimple.h>
#include <MFRC522Debug.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SPI.h>
#include <Rtc_Pcf8563.h>

int saat;
int dk;
int san;


MFRC522DriverPinSimple ss_1_pin(10); // Configurable, take an unused pin, only HIGH/LOW required, must be different to SS 1.
MFRC522DriverSPI driver_1{ss_1_pin};
MFRC522 readers[]{driver_1};   // Create MFRC522 instance.

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);

Rtc_Pcf8563 rtc;
/**
 * Initialize.
 */
void setup() {
  Serial.begin(115200);  // Initialize serial communications with the PC for debugging.
  rtc.initClock();
  while (true){
      Serial.println("Saat kac ?");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      saat = Serial.parseInt();
      if (saat<24 && saat>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(saat);
        break;
      }
      else if (saat>24 || saat<1){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      while (true){
      Serial.println("Kacinci dakika");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      dk = Serial.parseInt();
      if (dk<60 && dk>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(dk);
        break;
      }
      else if (dk>60 || dk<0){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      while (true){
      Serial.println("Kacinci saniye");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      san = Serial.parseInt();
      if (san<60 && san>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(san);
        break;
      }
      else if (san>60 || san<0){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      //day, weekday, month, century(1=1900, 0=2000), year(0-99)
      //hr, min, sec
  rtc.setTime(saat, dk, san);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  for (MFRC522 reader : readers) {
    reader.PCD_Init(); // Init each MFRC522 card.
    Serial.print(F("Reader "));
    static uint8_t i = 0;
    i++;
    Serial.print(i);
    Serial.print(F(": "));
    MFRC522Debug::PCD_DumpVersionToSerial(reader, Serial);
  }
}
/**
 * Main loop.
 */
void loop() {
  // Look for new cards.
  for (MFRC522 reader : readers) {
    if (reader.PICC_IsNewCardPresent() && reader.PICC_ReadCardSerial()) {
      Serial.print(F("Reader "));
      static uint8_t i = 0;
      i++;
      Serial.print(i);
      
      // Show some details of the PICC (that is: the tag/card).
      Serial.print(F(": Card UID:"));
      MFRC522Debug::PrintUID(Serial, reader.uid);
      Serial.println();
      // Halt PICC.
      reader.PICC_HaltA();
      // Stop encryption on PCD.
      reader.PCD_StopCrypto1();
      display.clearDisplay();
      display.setTextSize(1,3);
      display.setTextColor(WHITE);
      display.setCursor(0, 20);
      MFRC522Debug::PrintUID(display, reader.uid);
      display.display();
      delay(3000);
      }
    }
        display.clearDisplay();
        display.setTextSize(1);
        display.setTextColor(WHITE);
        display.setCursor(10,0);
        display.print(rtc.formatTime());
        display.display();
}

The problem is for example my UID is "78 CD 6E FD". MFRC522 is printing "FD 6E CD 78" anyway that can i take this output in reverse.

UKHeliBob · August 3, 2022, 12:55pm

The UID is presumably being printed by

      MFRC522Debug::PrintUID(Serial, reader.uid);

What makes you think that it is being printed in reverse, not that I am saying it isn't

If you want to print the UID for yourself then consider using a for loop to print the contents of reader.uid yourself as that is where I suspect it is held

supflynn · August 3, 2022, 1:08pm

Thanks for your precious answer. I may consider to print it by myself. I have a code to print it as DEC thats okey too.

void printDec(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], DEC);
  }
}

How can i implement this to my current code. I made this void outside of any loop. normally when printing to serial that was easy to do task.

#include <MFRC522v2.h>
#include <MFRC522DriverSPI.h>
#include <MFRC522DriverPinSimple.h>
#include <MFRC522Debug.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SPI.h>
#include <Rtc_Pcf8563.h>

int saat;
int dk;
int san;


MFRC522DriverPinSimple ss_1_pin(10); // Configurable, take an unused pin, only HIGH/LOW required, must be different to SS 1.
MFRC522DriverSPI driver_1{ss_1_pin};
MFRC522 readers[]{driver_1};   // Create MFRC522 instance.

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);

Rtc_Pcf8563 rtc;
/**
 * Initialize.
 */
void setup() {
  Serial.begin(115200);  // Initialize serial communications with the PC for debugging.
  rtc.initClock();
  while (true){
      Serial.println("Saat kac ?");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      saat = Serial.parseInt();
      if (saat<24 && saat>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(saat);
        break;
      }
      else if (saat>24 || saat<1){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      while (true){
      Serial.println("Kacinci dakika");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      dk = Serial.parseInt();
      if (dk<60 && dk>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(dk);
        break;
      }
      else if (dk>60 || dk<0){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      while (true){
      Serial.println("Kacinci saniye");
      while (Serial.available() == 1){delay(10);}
      while (Serial.available() == 0){}
      san = Serial.parseInt();
      if (san<60 && san>0){
        Serial.println("basarili bir deger girdiniz");
        Serial.print("girmis oldugunuz deger: ");
        Serial.println(san);
        break;
      }
      else if (san>60 || san<0){
        Serial.println("Hatali deger araliginda bir sayi girdiniz lutfen tekrar giriniz.");
        }
      }
      //day, weekday, month, century(1=1900, 0=2000), year(0-99)
      //hr, min, sec
  rtc.setTime(saat, dk, san);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  for (MFRC522 reader : readers) {
    reader.PCD_Init(); // Init each MFRC522 card.
    Serial.print(F("Reader "));
    static uint8_t i = 0;
    i++;
    Serial.print(i);
    Serial.print(F(": "));
    MFRC522Debug::PCD_DumpVersionToSerial(reader, Serial);
  }
}

void printDec(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], DEC);
  }
}
/**
 * Main loop.
 */
void loop() {
  // Look for new cards.
  for (MFRC522 reader : readers) {
    if (reader.PICC_IsNewCardPresent() && reader.PICC_ReadCardSerial()) {
      Serial.print(F("Reader "));
      static uint8_t i = 0;
      i++;
      Serial.print(i);
      
      // Show some details of the PICC (that is: the tag/card).
      Serial.print(F(": Card UID:"));
      MFRC522Debug::PrintUID(Serial, reader.uid);
      Serial.println();
      // Halt PICC.
      reader.PICC_HaltA();
      // Stop encryption on PCD.
      reader.PCD_StopCrypto1();
      printDec(reader.uid);
      display.clearDisplay();
      display.setTextSize(1,3);
      display.setTextColor(WHITE);
      display.setCursor(0, 20);
      MFRC522Debug::PrintUID(display, reader.uid);
      display.display();
      delay(3000);
      }
    }
        display.clearDisplay();
        display.setTextSize(1);
        display.setTextColor(WHITE);
        display.setCursor(10,0);
        display.print(rtc.formatTime());
        display.display();
}

It supposed to work if i write it like this.

But this is the error i get.

Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Detecting libraries used...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for MFRC522v2.h: [RFID_MFRC522v2@2.0.3]

ResolveLibrary(MFRC522v2.h)

  -> candidates: [RFID_MFRC522v2@2.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for SPI.h: [SPI@1.0]

ResolveLibrary(SPI.h)

  -> candidates: [SPI@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Wire.h: [Wire@1.0]

ResolveLibrary(Wire.h)

  -> candidates: [Wire@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_GFX.h: [Adafruit_GFX_Library@1.11.3]

ResolveLibrary(Adafruit_GFX.h)

  -> candidates: [Adafruit_GFX_Library@1.11.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_I2CDevice.h: [Adafruit_BusIO@1.12.0]

ResolveLibrary(Adafruit_I2CDevice.h)

  -> candidates: [Adafruit_BusIO@1.12.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_SSD1306.h: [Adafruit_SSD1306@2.5.6]

ResolveLibrary(Adafruit_SSD1306.h)

  -> candidates: [Adafruit_SSD1306@2.5.6]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Rtc_Pcf8563.h: [Rtc_Pcf8563@1.0.3]

ResolveLibrary(Rtc_Pcf8563.h)

  -> candidates: [Rtc_Pcf8563@1.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Debug.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverI2C.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverSPI.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Hack.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522v2.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\Wire.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\utility\twi.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GrayOLED.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\glcdfont.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_BusIO_Register.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_I2CDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_SPIDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306\Adafruit_SSD1306.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563\src\Rtc_Pcf8563.cpp

Generating function prototypes...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

Compiling sketch...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp.o"

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void loop()':

RFID:118:26: error: cannot convert 'MFRC522::Uid {aka MFRC522Constants::Uid}' to 'byte* {aka unsigned char*}' for argument '1' to 'void printDec(byte*, byte)'

       printDec(reader.uid);

                          ^

Using library RFID_MFRC522v2 at version 2.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2 

Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 

Using library Wire at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 

Using library Adafruit_GFX_Library at version 1.11.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library 

Using library Adafruit_BusIO at version 1.12.0 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO 

Using library Adafruit_SSD1306 at version 2.5.6 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306 

Using library Rtc_Pcf8563 at version 1.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563 

exit status 1

cannot convert 'MFRC522::Uid {aka MFRC522Constants::Uid}' to 'byte* {aka unsigned char*}' for argument '1' to 'void printDec(byte*, byte)'

Danois90 · August 3, 2022, 1:21pm

You have a method: printDec(arg1, arg2) which is called with only one argument of the wrong type: printDec(reader.uid).

supflynn · August 3, 2022, 1:23pm

Sorry my bad. Error code is.

Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Detecting libraries used...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for MFRC522v2.h: [RFID_MFRC522v2@2.0.3]

ResolveLibrary(MFRC522v2.h)

  -> candidates: [RFID_MFRC522v2@2.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for SPI.h: [SPI@1.0]

ResolveLibrary(SPI.h)

  -> candidates: [SPI@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Wire.h: [Wire@1.0]

ResolveLibrary(Wire.h)

  -> candidates: [Wire@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_GFX.h: [Adafruit_GFX_Library@1.11.3]

ResolveLibrary(Adafruit_GFX.h)

  -> candidates: [Adafruit_GFX_Library@1.11.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_I2CDevice.h: [Adafruit_BusIO@1.12.0]

ResolveLibrary(Adafruit_I2CDevice.h)

  -> candidates: [Adafruit_BusIO@1.12.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_SSD1306.h: [Adafruit_SSD1306@2.5.6]

ResolveLibrary(Adafruit_SSD1306.h)

  -> candidates: [Adafruit_SSD1306@2.5.6]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Rtc_Pcf8563.h: [Rtc_Pcf8563@1.0.3]

ResolveLibrary(Rtc_Pcf8563.h)

  -> candidates: [Rtc_Pcf8563@1.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Debug.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverI2C.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverSPI.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Hack.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522v2.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\Wire.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\utility\twi.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GrayOLED.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\glcdfont.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_BusIO_Register.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_I2CDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_SPIDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306\Adafruit_SSD1306.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563\src\Rtc_Pcf8563.cpp

Generating function prototypes...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

Compiling sketch...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp.o"

RFID:92:28: error: expected identifier before ')' token

 void printDec(byte *buffer,) {

                            ^

RFID:92:28: error: expected identifier before ')' token

 void printDec(byte *buffer,) {

                            ^

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void printDec(byte*, int)':

RFID:93:24: error: 'bufferSize' was not declared in this scope

   for (byte i = 0; i < bufferSize; i++) {

                        ^~~~~~~~~~

C:\Users\Administrator\Downloads\RFID\RFID.ino:93:24: note: suggested alternative: 'buffer'

   for (byte i = 0; i < bufferSize; i++) {

                        ^~~~~~~~~~

                        buffer

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void loop()':

RFID:118:26: error: cannot convert 'MFRC522::Uid {aka MFRC522Constants::Uid}' to 'byte* {aka unsigned char*}' for argument '1' to 'void printDec(byte*, int)'

       printDec(reader.uid);

                          ^

Using library RFID_MFRC522v2 at version 2.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2 

Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 

Using library Wire at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 

Using library Adafruit_GFX_Library at version 1.11.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library 

Using library Adafruit_BusIO at version 1.12.0 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO 

Using library Adafruit_SSD1306 at version 2.5.6 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306 

Using library Rtc_Pcf8563 at version 1.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563 

exit status 1

expected identifier before ')' token

Real code is.

Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Detecting libraries used...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for MFRC522v2.h: [RFID_MFRC522v2@2.0.3]

ResolveLibrary(MFRC522v2.h)

  -> candidates: [RFID_MFRC522v2@2.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for SPI.h: [SPI@1.0]

ResolveLibrary(SPI.h)

  -> candidates: [SPI@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Wire.h: [Wire@1.0]

ResolveLibrary(Wire.h)

  -> candidates: [Wire@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_GFX.h: [Adafruit_GFX_Library@1.11.3]

ResolveLibrary(Adafruit_GFX.h)

  -> candidates: [Adafruit_GFX_Library@1.11.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_I2CDevice.h: [Adafruit_BusIO@1.12.0]

ResolveLibrary(Adafruit_I2CDevice.h)

  -> candidates: [Adafruit_BusIO@1.12.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_SSD1306.h: [Adafruit_SSD1306@2.5.6]

ResolveLibrary(Adafruit_SSD1306.h)

  -> candidates: [Adafruit_SSD1306@2.5.6]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Rtc_Pcf8563.h: [Rtc_Pcf8563@1.0.3]

ResolveLibrary(Rtc_Pcf8563.h)

  -> candidates: [Rtc_Pcf8563@1.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Debug.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverI2C.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverSPI.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Hack.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522v2.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\Wire.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\utility\twi.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GrayOLED.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\glcdfont.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_BusIO_Register.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_I2CDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_SPIDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306\Adafruit_SSD1306.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563\src\Rtc_Pcf8563.cpp

Generating function prototypes...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

Compiling sketch...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp.o"

RFID:92:28: error: expected identifier before ')' token

 void printDec(byte *buffer,) {

                            ^

RFID:92:28: error: expected identifier before ')' token

 void printDec(byte *buffer,) {

                            ^

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void printDec(byte*, int)':

RFID:93:24: error: 'bufferSize' was not declared in this scope

   for (byte i = 0; i < bufferSize; i++) {

                        ^~~~~~~~~~

C:\Users\Administrator\Downloads\RFID\RFID.ino:93:24: note: suggested alternative: 'buffer'

   for (byte i = 0; i < bufferSize; i++) {

                        ^~~~~~~~~~

                        buffer

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void loop()':

RFID:118:26: error: cannot convert 'MFRC522::Uid {aka MFRC522Constants::Uid}' to 'byte* {aka unsigned char*}' for argument '1' to 'void printDec(byte*, int)'

       printDec(reader.uid);

                          ^

Using library RFID_MFRC522v2 at version 2.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2 

Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 

Using library Wire at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 

Using library Adafruit_GFX_Library at version 1.11.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library 

Using library Adafruit_BusIO at version 1.12.0 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO 

Using library Adafruit_SSD1306 at version 2.5.6 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306 

Using library Rtc_Pcf8563 at version 1.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563 

exit status 1

expected identifier before ')' token

Danois90 · August 3, 2022, 1:29pm

Apparently a copy paste programmer. Instead of removing what you think is to much, you should instead add what is missing....

supflynn · August 3, 2022, 1:37pm

yeah that decimal code is imported. I'm in research for it but nothing comes up to my mind to reverse print it. I had some kind of a idea. But it gave me an error. The idea was storing reader.uid in string and classing it as 2 characters per variable and then reverse outputting. But when i try to set reader.uid as a "UID" string and printing that string on my oled causes this error.

Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Administrator\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10819 -build-path C:\Users\ADMINI~1\AppData\Local\Temp\arduino_build_517614 -warnings=all -build-cache C:\Users\ADMINI~1\AppData\Local\Temp\arduino_cache_176737 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Administrator\Downloads\RFID\RFID.ino

Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr

Detecting libraries used...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for MFRC522v2.h: [RFID_MFRC522v2@2.0.3]

ResolveLibrary(MFRC522v2.h)

  -> candidates: [RFID_MFRC522v2@2.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for SPI.h: [SPI@1.0]

ResolveLibrary(SPI.h)

  -> candidates: [SPI@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Wire.h: [Wire@1.0]

ResolveLibrary(Wire.h)

  -> candidates: [Wire@1.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_GFX.h: [Adafruit_GFX_Library@1.11.3]

ResolveLibrary(Adafruit_GFX.h)

  -> candidates: [Adafruit_GFX_Library@1.11.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_I2CDevice.h: [Adafruit_BusIO@1.12.0]

ResolveLibrary(Adafruit_I2CDevice.h)

  -> candidates: [Adafruit_BusIO@1.12.0]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Adafruit_SSD1306.h: [Adafruit_SSD1306@2.5.6]

ResolveLibrary(Adafruit_SSD1306.h)

  -> candidates: [Adafruit_SSD1306@2.5.6]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Alternatives for Rtc_Pcf8563.h: [Rtc_Pcf8563@1.0.3]

ResolveLibrary(Rtc_Pcf8563.h)

  -> candidates: [Rtc_Pcf8563@1.0.3]

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o nul

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Debug.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverI2C.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522DriverSPI.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522Hack.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src\MFRC522v2.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\Wire.cpp

Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\utility\twi.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GrayOLED.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library\glcdfont.c

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_BusIO_Register.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_I2CDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO\Adafruit_SPIDevice.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306\Adafruit_SSD1306.cpp

Using cached library dependencies for file: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563\src\Rtc_Pcf8563.cpp

Generating function prototypes...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\preproc\\ctags_target_for_gcc_minus_e.cpp"

Compiling sketch...

"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10819 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\RFID_MFRC522v2\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\Wire\\src" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-IC:\\Users\\Administrator\\Documents\\Arduino\\libraries\\Rtc_Pcf8563\\src" "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp" -o "C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\arduino_build_517614\\sketch\\RFID.ino.cpp.o"

C:\Users\Administrator\Downloads\RFID\RFID.ino: In function 'void loop()':

RFID:113:25: error: conversion from 'MFRC522::Uid {aka MFRC522Constants::Uid}' to non-scalar type 'String' requested

       String UID=reader.uid;

                  ~~~~~~~^~~

RFID:118:42: error: no matching function for call to 'MFRC522Debug::PrintUID(Adafruit_SSD1306&, String&)'

       MFRC522Debug::PrintUID(display, UID);

                                          ^

In file included from C:\Users\Administrator\Downloads\RFID\RFID.ino:4:0:

C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src/MFRC522Debug.h:24:15: note: candidate: static void MFRC522Debug::PrintUID(Print&, const Uid&)

   static void PrintUID(Print &logPrint, const Uid &uid);

               ^~~~~~~~

C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2\src/MFRC522Debug.h:24:15: note:   no known conversion for argument 2 from 'String' to 'const Uid& {aka const MFRC522Constants::Uid&}'

Using library RFID_MFRC522v2 at version 2.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\RFID_MFRC522v2 

Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 

Using library Wire at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 

Using library Adafruit_GFX_Library at version 1.11.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_GFX_Library 

Using library Adafruit_BusIO at version 1.12.0 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_BusIO 

Using library Adafruit_SSD1306 at version 2.5.6 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Adafruit_SSD1306 

Using library Rtc_Pcf8563 at version 1.0.3 in folder: C:\Users\Administrator\Documents\Arduino\libraries\Rtc_Pcf8563 

exit status 1

conversion from 'MFRC522::Uid {aka MFRC522Constants::Uid}' to non-scalar type 'String' requested

This part of the code is now looks like this. I just changed this spesific part over first one i have pasted in post.

reader.PCD_StopCrypto1();
      String UID=reader.uid;
      display.clearDisplay();
      display.setTextSize(1,3);
      display.setTextColor(WHITE);
      display.setCursor(0, 20);
      MFRC522Debug::PrintUID(display, UID);
      display.display();

b707 · August 4, 2022, 6:59pm

o-o-o
what's this?

b707 · August 4, 2022, 7:09pm

What prevents you from rewriting your printDec() function so that the for loop is goes in reverse direction - from bufferSize to 0?
It give you the result what you desired.

supflynn · August 5, 2022, 5:39am

It is for RTC to set it up from Serial port screen.

supflynn · August 5, 2022, 5:41am

It's error code is mentioned in the 3rd post.

b707 · August 5, 2022, 7:03am

The cause of the error is described in post 4
Your printDec() function requires two parameters, but you called it with only one.

Do you read the answers?

Regarding to while loops , as I mentioned in post 8 - it are absolutely senseless.

supflynn · August 5, 2022, 7:10am

yeah later on i deleted one of the required parameters for my use case but it didn't worked i should've posted here.

Edit: My bad i have posted error code two times instead of pasting one code one error.

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UID from MFRC522 Is Printing Wrong

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