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isHexadecimalDigit()

Analyse if a char is an hexadecimal digit (A-F, 0-9). Returns true if thisChar contains an hexadecimal digit. isHexadecimalDigit(thisChar)
 thisChar: variable. Allowed data types: char. true: if thisChar is an hexadecimal digit. 
		
if (isHexadecimalDigit(myChar)) { // tests if myChar is an hexadecimal digit
  Serial.println("The character is an hexadecimal digit");
}
else {
  Serial.println("The character is not an hexadecimal digit");
}