#include <Arduino.h>

// cores/esp8266/base64.h
// Actually http://platformio.org/platforms/espressif8266, version: 1.3.0 but origin git files unchanged
#include "base64.h"

String test = "\x0d\xa6\x8d\x16\x39\x40\xc0\x9b\x54\xba\xed\xd2\x01\xe7\xa8\xd6\x8f\x9b\x9f\x71\xdb\x7f\x98\x93\xd8\x02\x87\x8d\x6e\xfa\xcb\xd8\xa9\x03\x28\xe3\x31\xfe\x3f\xeb\xcd\x23\x03\x51\x71\xc7\x1c\x12\xd3\x6b\x8d\xd6\x86\x32\x5d\x36\xcc\x52\xa4\xe5\xbd\x63\x50\xd4\x07\xaa\x4c\xec\x64\x4c\x5d\x3f\x93\xea\xb1\x45\x30\xa9\x40\xa8";

  String strOut = base64::encode(test);

  Serial.println("\n");
  Serial.print("'");
  Serial.print(strOut.c_str());
  Serial.println("'");

// Output NOTE: the unprintable character / line break is part of output
// 'DaaNFjlAwJtUuu3SAeeo1o+bn3Hbf5iT2AKHjW76y9ipAyjjMf4/680jA1FxxxwS02uN1oYy
// XTbMUqTlvWNQ1AeqTOxkTF0/k+qxRTCpQKg='

// Closer examination of the string buffer reveals an unprintable character
// ie.
// <snip> 78 78 78 77 53 30 32 75 4e 31 6f 59 79 0a 58 54 62 4d 55 71 54 <snip>
// <snip> x  x  x  w  S  0  2  u  N  1  o  Y  y     X  T  b  M  U  q  T  <snip>

// https://github.com/adamvr/arduino-base64 (MIT license)
// Requires __AVR__ header guard for <pgmspace.h>, messing with function char constness and renaming .h file/functions due to name clash
#include "Base64.h"
String test = "\x0d\xa6\x8d\x16\x39\x40\xc0\x9b\x54\xba\xed\xd2\x01\xe7\xa8\xd6\x8f\x9b\x9f\x71\xdb\x7f\x98\x93\xd8\x02\x87\x8d\x6e\xfa\xcb\xd8\xa9\x03\x28\xe3\x31\xfe\x3f\xeb\xcd\x23\x03\x51\x71\xc7\x1c\x12\xd3\x6b\x8d\xd6\x86\x32\x5d\x36\xcc\x52\xa4\xe5\xbd\x63\x50\xd4\x07\xaa\x4c\xec\x64\x4c\x5d\x3f\x93\xea\xb1\x45\x30\xa9\x40\xa8";

  char out[base64_enc_len(test.length())];
  base64_encode(&out[0], test.c_str(), test.length());
  String strOut = String(out);

  Serial.println("\n");
  Serial.print("'");
  Serial.print(strOut.c_str());
  Serial.println("'");

// Output NOTE: No line break from unprintable character
// 'DaaNFjlAwJtUuu3SAeeo1o+bn3Hbf5iT2AKHjW76y9ipAyjjMf4/680jA1FxxxwS02uN1oYyXTbMUqTlvWNQ1AeqTOxkTF0/k+qxRTCpQKg='