Seeedruino XIAO expansion board - mjolnir

#include <U8x8lib.h>
#include "ATSerial.h"
#include "Protocol.h"
#include "KCT202.h"

#define debug SerialUSB
#define uart  Serial1
FingerPrint_KCT202<Uart, Serial_> kct202;

Protocol_oprt oprt;
uint8_t err_code = 0;
uint8_t param[10];
uint32_t param_len;

int Electromagnet = 0;

U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* reset=*/ U8X8_PIN_NONE);

// the setup routine runs once when you press reset:
void setup() {
  // initialize the digital pin as an output.

  u8x8.begin();
  u8x8.setFlipMode(0);
  debug.begin(115200);
  pinMode(Electromagnet, OUTPUT);
  digitalWrite(Electromagnet, HIGH);  // turn the Electromagnet on (HIGH is the voltage level)
  kct202.begin(uart, debug);
  kct202.autoRegisterFingerPrint(1, 4, LED_OFF_AFTER_GET_GRAGH | PRETREATMENT_GRAGH | NOT_RET_FOR_EVERY_STEP | OVERRIDE_CURR_FINGER_PRINT);
  u8x8.setFont(u8x8_font_chroma48medium8_r);
  u8x8.setCursor(0, 3);
  u8x8.print("finger recording");
  if (0 == kct202.getRegisterResponAndparse()) {
    u8x8.setFont(u8x8_font_chroma48medium8_r);
    u8x8.setCursor(0, 3);
    u8x8.print("    be ready    ");
    delay(500);
    u8x8.setCursor(0, 3);
    u8x8.print("   *** 3 ***    ");
    delay(500);
    u8x8.setCursor(0, 3);
    u8x8.print("   *** 2 ***    ");
    delay(500);
    u8x8.setCursor(0, 3);
    u8x8.print("   *** 1 ***    ");
    delay(500);
    u8x8.setCursor(0, 3);
    u8x8.print("   Registered");
    delay(800);
  }

}

  // the loop routine runs over and over again forever:
  void loop() {

    uint16_t finger_num = 0;
    kct202.autoVerifyFingerPrint(CHECK_ALL_FINGER_TEMP, LED_OFF_AFTER_GET_GRAGH | PRETREATMENT_GRAGH | NOT_RET_FOR_EVERY_STEP);
    u8x8.setFont(u8x8_font_chroma48medium8_r);
    u8x8.setCursor(0, 3);
    u8x8.print(" Please verify  ");

    if (0 == kct202.getVerifyResponAndparse(finger_num)) {
      u8x8.setFont(u8x8_font_chroma48medium8_r);
      u8x8.setCursor(0, 3);
      u8x8.print("Identity comfirm");
      delay(800);
      digitalWrite(Electromagnet, LOW);  // turn the Electromagnet on (HIGH is the voltage level)
      delay(5000);
      digitalWrite(Electromagnet, HIGH);
    }

    else {
      u8x8.setFont(u8x8_font_chroma48medium8_r);
      u8x8.setCursor(0, 3);
      u8x8.print(" Identity deny ");
      //    myservo.write(0);
      delay(200);

      u8x8.setCursor(0, 3);
      u8x8.print("  Please retry  ");
      delay(1500);
      digitalWrite(Electromagnet, HIGH);  // turn the Electromagnet on (HIGH is the voltage level)

    }
  }