uint8_t numArray [] = {16, 3, 92, 56, 7, 212, 49, 124};
String nums = "12345678";
char numsC [8];

void setup() {

  Serial.begin(115200);
  Serial.println("Hello");
  printHex();
  Serial.println();
  printArrayHex();
  Serial.println();
  strcpy (numsC, nums.c_str());
  printStringHex();

}

void printHex () {

  Serial.println("\nDecimal Values 0 - 255 in Hex");

  for (uint16_t i = 0; i < 256; i ++) {
    if (i % 8 == 0) Serial.println(); //If remainder of dividing i by 8 == 0
    if (i < 16) Serial.print("0x0");
    else  Serial.print("0x");
    Serial.print(i, HEX);
    Serial.print("  ");
  }
}

void printArrayHex() {

  Serial.println("\nDecimal Values from an Array in Hex");
  for (uint16_t i = 0; i < sizeof (numArray) ; i ++) {
    if (i % 8 == 0) Serial.println();
    if (numArray[i] < 16) Serial.print("0x0");
    else  Serial.print("0x");
    Serial.print(numArray[i], HEX);
    Serial.print("  ");
  }
}
void printStringHex() {

  Serial.println("\nDecimal Values from a String to Array as Hex");
  Serial.print("Original Arduino String \"");
  Serial.print(nums);
  Serial.println("\"");
  for (uint16_t i = 0; i < sizeof (numsC) ; i ++) {
    if (i % 8 == 0) Serial.println();
    Serial.print(numsC[i]);
    Serial.print(" = ");
    if ((numsC[i] - '0') < 16) Serial.print("0x0");
    else  Serial.print("0x");
    Serial.print(numsC[i] - '0', HEX);
    Serial.print("  ");
  }
  //////////////Miscelaneous Prints////////////////////
  Serial.print("\n\n");
  Serial.write(0x30);
  Serial.write(0x31);
  Serial.write(0x32);
  Serial.write(0x33);
  Serial.write(0x34);
  Serial.write(0x35);
  Serial.write(0x36);
  Serial.println();
  byte numArray2[] = {0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36};
  Serial.write(numArray2, 7);//Short way of Serial.write() the whole Array
  Serial.println();
  byte numArray3[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
  Serial.write(numArray3, 7);//Prints non-printable characters - Control codes
  Serial.println();
  for (uint8_t k = 0; k < 7; k ++) {
    Serial.print(numArray3[k]);//Now prints the Decimal values from the same Array
  }

  Serial.println();

  /////How to auto generate the printableChars array used below..

  Serial.println("\nHow to auto generate the printableChars array used below..\n");
  Serial.print("byte printableChars [96] = {");
  for (uint8_t j = 32; j < 128; j ++) {
    if (j % 8 == 0) Serial.println(); 
    Serial.print("0x");
    Serial.print(j, HEX);
    if (j < 127) {
      Serial.print(",");
      Serial.print("  ");
    }
  }
  Serial.println("\n};");// Just 11 short lines of code, job done

  byte printableChars [96] = {0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
                              0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
                              0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
                              0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
                              0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
                              0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
                              0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
                              0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
                              0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
                              0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
                              0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
                              0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
                             };//These are the regular Ascii set values 32 - 127

  for (uint16_t i = 0; i < 96; i++) {
    if (i % 8 == 0) Serial.println();
    Serial.print("  ");
    if (i == 95) Serial.print("DEL");
    Serial.write(printableChars[i]);
    if (printableChars[i] < 100) Serial.print("  ");
    else Serial.print(" ");
    Serial.print(printableChars[i]);
  }
  
  Serial.println("\n\nTEN ways to print a 5");
  uint8_t afive = '5';
  uint8_t bfive = 5;
  Serial.println();
  Serial.print("1. ");
  Serial.write(afive); Serial.println();
  Serial.print("2. ");
  Serial.println(bfive);
  Serial.print("3. ");
  Serial.println("5");
  Serial.print("4. ");
  Serial.println(5);
  Serial.print("5. ");
  Serial.write(53); Serial.println();
  Serial.print("6. ");
  Serial.write(0x35); Serial.println();
  Serial.print("7. ");
  Serial.println(0x05);
  Serial.print("8. ");
  Serial.println("\x35");
  Serial.print("9. ");
  Serial.write(B00110101); Serial.println();
  Serial.print("10. ");
  Serial.println(B00000101);
  
  uint8_t letsSee [] = {73, 32, 71, 69, 84, 32, 84, 72, 73, 83, 33, 32, 89, 69, 65, 72};

  Serial.write(letsSee, sizeof (letsSee));

}
void loop() {
  // put your main code here, to run repeatedly:

}