diff --git a/cores/esp8266/HardwareSerial.cpp b/cores/esp8266/HardwareSerial.cpp
index 1f846454e..c1b81487b 100644
--- a/cores/esp8266/HardwareSerial.cpp
+++ b/cores/esp8266/HardwareSerial.cpp
@@ -643,7 +643,7 @@ int HardwareSerial::available(void) {
 
     if (_uart != NULL && _uart->rxEnabled) {
         InterruptLock il;
-        result = static_cast<int>(_rx_buffer->getSize());
+        result = static_cast<int>(_rx_buffer->available());
     }
 
     if (!result) {
@@ -696,7 +696,7 @@ void HardwareSerial::flush() {
     while(true) {
         {
             InterruptLock il;
-            if(_tx_buffer->getSize() == 0 &&
+            if(_tx_buffer->available() == 0 &&
                UART_GET_TX_FIFO_ROOM(uart_nr) >= UART_TX_FIFO_SIZE) {
                 break;
             } else if(il.savedInterruptLevel() > 0) {
@@ -750,7 +750,7 @@ void ICACHE_RAM_ATTR HardwareSerial::_rx_complete_irq(char c) {
 
 void ICACHE_RAM_ATTR HardwareSerial::_tx_empty_irq(void) {
     const int uart_nr = _uart->uart_nr;
-    size_t queued = _tx_buffer->getSize();
+    size_t queued = _tx_buffer->available();
     if(!queued) {
         UART_DISARM_TX_INTERRUPT(uart_nr);
         return;
diff --git a/cores/esp8266/cbuf.cpp b/cores/esp8266/cbuf.cpp
index cf539e6b0..ca5977df4 100644
--- a/cores/esp8266/cbuf.cpp
+++ b/cores/esp8266/cbuf.cpp
@@ -22,7 +22,7 @@
 #include "c_types.h"
 
 cbuf::cbuf(size_t size) :
-        _size(size), _buf(new char[size]), _bufend(_buf + size), _begin(_buf), _end(_begin) {
+    next(NULL), _size(size), _buf(new char[size]), _bufend(_buf + size), _begin(_buf), _end(_begin) {
 }
 
 cbuf::~cbuf() {
@@ -35,11 +35,11 @@ size_t cbuf::resizeAdd(size_t addSize) {
 
 size_t cbuf::resize(size_t newSize) {
 
-    size_t available = getSize();
+    size_t bytes_available = available();
 
 	// not lose any data
 	// if data can be lost use remove or flush before resize
-    if((newSize < available) || (newSize == _size)) {
+    if((newSize < bytes_available) || (newSize == _size)) {
         return _size;
     }
 
@@ -51,12 +51,12 @@ size_t cbuf::resize(size_t newSize) {
     }
 
     if(_buf) {
-        read(newbuf, available);
-        memset((newbuf + available), 0x00, (newSize - available));
+        read(newbuf, bytes_available);
+        memset((newbuf + bytes_available), 0x00, (newSize - bytes_available));
     }
 
     _begin = newbuf;
-    _end = newbuf + available;
+    _end = newbuf + bytes_available;
     _bufend = newbuf + newSize;
     _size = newSize;
 
@@ -66,13 +66,17 @@ size_t cbuf::resize(size_t newSize) {
     return _size;
 }
 
-size_t ICACHE_RAM_ATTR cbuf::getSize() const {
+size_t ICACHE_RAM_ATTR cbuf::available() const {
     if(_end >= _begin) {
         return _end - _begin;
     }
     return _size - (_begin - _end);
 }
 
+size_t cbuf::size() {
+    return _size;
+}
+
 size_t cbuf::room() const {
     if(_end >= _begin) {
         return _size - (_end - _begin) - 1;
@@ -88,7 +92,7 @@ int cbuf::peek() {
 }
 
 size_t cbuf::peek(char *dst, size_t size) {
-    size_t bytes_available = getSize();
+    size_t bytes_available = available();
     size_t size_to_read = (size < bytes_available) ? size : bytes_available;
     size_t size_read = size_to_read;
     char * begin = _begin;
@@ -113,7 +117,7 @@ int ICACHE_RAM_ATTR cbuf::read() {
 }
 
 size_t cbuf::read(char* dst, size_t size) {
-    size_t bytes_available = getSize();
+    size_t bytes_available = available();
     size_t size_to_read = (size < bytes_available) ? size : bytes_available;
     size_t size_read = size_to_read;
     if(_end < _begin && size_to_read > (size_t) (_bufend - _begin)) {
@@ -159,7 +163,7 @@ void cbuf::flush() {
 }
 
 size_t cbuf::remove(size_t size) {
-    size_t bytes_available = getSize();
+    size_t bytes_available = available();
     if(size >= bytes_available) {
         flush();
         return 0;
@@ -171,5 +175,5 @@ size_t cbuf::remove(size_t size) {
         size_to_remove -= top_size;
     }
     _begin = wrap_if_bufend(_begin + size_to_remove);
-    return getSize();
+    return available();
 }
diff --git a/cores/esp8266/cbuf.h b/cores/esp8266/cbuf.h
index bc6372819..9c358a70e 100644
--- a/cores/esp8266/cbuf.h
+++ b/cores/esp8266/cbuf.h
@@ -32,7 +32,8 @@ class cbuf {
 
         size_t resizeAdd(size_t addSize);
         size_t resize(size_t newSize);
-        size_t getSize() const;
+        size_t available() const;
+        size_t size();
 
         size_t room() const;
 
@@ -56,6 +57,8 @@ class cbuf {
         void flush();
         size_t remove(size_t size);
 
+        cbuf *next;
+
     private:
         inline char* wrap_if_bufend(char* ptr) const {
             return (ptr == _bufend) ? _buf : ptr;
@@ -66,6 +69,7 @@ class cbuf {
         const char* _bufend;
         char* _begin;
         char* _end;
+
 };
 
 #endif//__cbuf_h
diff --git a/platform.txt b/platform.txt
index 52c5eac5e..5ad132ac0 100644
--- a/platform.txt
+++ b/platform.txt
@@ -6,7 +6,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5---3rd-party-Hardware-specification
 
 name=ESP8266 Modules
-version=2.0.0
+version=2.1.0
 
 runtime.tools.xtensa-lx106-elf-gcc.path={runtime.platform.path}/tools/xtensa-lx106-elf
 runtime.tools.esptool.path={runtime.platform.path}/tools/esptool