// Test for normal strings with UTF-8
// Public Domain

char three[] = "3µV";
const char four[] PROGMEM = "4µA";
String five = "5µF";
char six[] = "60€";
String seven = "70€";

char buffer[40];

void setup() 
{
  Serial.begin( 9600);

  Serial.println("\n+++++++++++++++++++++++++++++++++++++++++");
  Serial.println("Use a serial terminal that supports UTF-8");

  Serial.println(F("1µH"));        // Good, text in flash

  // copy a string from flash memory to a buffer.  
  sprintf_P( buffer, PSTR("2µH")); // Good, text in flash
  Serial.println( buffer);

  // copy a string in ram to a buffer
  strcpy( buffer, three);          // Good
  Serial.println( buffer);

  // add one to strlen for the zero terminator
  strncpy( buffer, three, strlen(three) + 1); // Good, strlen works with UTF-8 string
  Serial.println( buffer);

  strcpy_P( buffer, four);         // Good, text in flash with PROGMEM
  Serial.println( buffer);

  // copy a string in flash to buffer byte for byte
  for( int i = 0 ; i < sizeof( four) ; i++)  // Good, sizeof works with UTF-8 string
  {
    buffer[i] = pgm_read_byte( four + i);
  }
  Serial.println( buffer);

  Serial.println( five);           // Good, a String class with UTF-8 character
  
  Serial.print( "array of char: \"");
  Serial.print( six);
  Serial.print( "\", strlen=");
  Serial.println( strlen(six));
  
  Serial.print( "String object: \"");
  Serial.print( seven);
  Serial.print( "\", String.length()=");
  Serial.println( seven.length());

  Serial.println( "+++++++++++++++++++++++++++++++++++++++++");

  Serial.println( "Enter a UTF-8 character and press <enter>");
  Serial.println( "The hexadecimal value will be displayed.");
}

void loop()
{
  if( Serial.available())
  {
    Serial.print( "You have entered: ");
    delay(100);      // allow the rest of the line to be received.
    while( Serial.available())
    {
      byte c = Serial.read();
      if( c != '\r' && c != '\n')  // ignore trailing CR and LF
      {
        if( c <= 0x0F)
          Serial.print( "0");
        Serial.print( c, HEX);
        Serial.print( ", ");
      }
    }
    Serial.println();
  }
}