void setup() {
  // put your setup code here, to run once:
  char i=48;
  byte NUM[]={48,49,50,51,52,53};
  Serial.begin(115200);
  Serial.println(123,DEC);
  Serial.println(123,BIN);
  Serial.println(123,HEX);
  Serial.println(12.3,3);
  Serial.println(12,3);
  Serial.write("ESP32");
  Serial.println();
  Serial.println("ESP32");
  Serial.write(123);
  Serial.println();
  Serial.write(i);
  Serial.println();
  Serial.println(i);
  Serial.write(NUM,2);
}

void loop() {

}