@staticmethod
def convert_str_unicode_hex_values_to_str(s):
    """Convert string containing hex values to ASCII.

        For example, '680065006c006c006f00' converts to 'hello'
        """
    s = s.replace('00', '')
    result = ''
    try:
        for i in range(0, len(s), 2):
            result += bytearray.fromhex(s[i:i + 2]).decode()
    except (UnicodeDecodeError, ValueError):
        pass
    if result == '':
        return
    return result
