我正在编写一个程序来加密给定的输入，并通过LoRa波发送密文，但我似乎被困在这一步。我使用的是Heltec LoRa ESP32，并包含了AES函数的mbedtls库。

#include "mbedtls/aes.h"
#include "heltec.h"
#include <SPI.h>
#define BAND    433E6 //setting the LoRa bands to 433 mhz
mbedtls_aes_context aes;
int counter = 0;
unsigned char key[32] = "key"; // 256 bit - AES = 32 bytes for key
unsigned char iv[16];
unsigned char input [128] = "given AES plain text";
unsigned char output[128];
size_t input_len = 40;
size_t output_len = 0;
void setup() {
  Heltec.begin(true /*DisplayEnable Enable*/, true /*Heltec.Heltec.Heltec.LoRa Disable*/, true /*Serial Enable*/, true /*PABOOST Enable*/, BAND /*long BAND*/);
  //setup code to enable LoRa
  
  Serial.begin(115200); //establishing serial communication with esp32 and pc
  mbedtls_aes_setkey_enc( &aes, key, 256 );
  mbedtls_aes_crypt_cbc( &aes, MBEDTLS_AES_ENCRYPT, 48, iv, input, output ); // AES function from mbedtls library,
}
void loop() {
  Serial.print("Sending packet: ");
  Serial.println(counter);
  Serial.println((char*)output); //here is the issue
  // send packet
  LoRa.beginPacket();
  LoRa.print((char*)output);
  LoRa.print(counter);
  LoRa.endPacket();
  
  counter++;
  delay(5000);
}

输出给出了一个包含（我假设）特殊字符的密文，当我看Arduino串行监视器时，它显示了一堆反向问号和带有正常字符的框。

Serial.println((char*)output);

Arduino IDE中是否有打印方法可以显示这些特殊字符？