diff --git a/cores/esp8266/Updater.cpp b/cores/esp8266/Updater.cpp
index c4ec4b00b..c823d8f89 100644
--- a/cores/esp8266/Updater.cpp
+++ b/cores/esp8266/Updater.cpp
@@ -19,6 +19,7 @@ UpdaterClass::UpdaterClass()
 , _size(0)
 , _startAddress(0)
 , _currentAddress(0)
+, _command(U_FLASH)
 {
 }
 
@@ -30,9 +31,10 @@ void UpdaterClass::_reset() {
   _startAddress = 0;
   _currentAddress = 0;
   _size = 0;
+  _command = U_FLASH;
 }
 
-bool UpdaterClass::begin(size_t size){
+bool UpdaterClass::begin(size_t size, int command) {
   if(_size > 0){
 #ifdef DEBUG_UPDATER
     DEBUG_UPDATER.println("already running");
@@ -40,7 +42,13 @@ bool UpdaterClass::begin(size_t size){
     return false;
   }
 
-  if(size == 0){
+#ifdef DEBUG_UPDATER
+  if (command == U_SPIFFS) {
+    DEBUG_UPDATER.println("Update SPIFFS.");
+  }
+#endif
+
+  if(size == 0) {
     _error = UPDATE_ERROR_SIZE;
 #ifdef DEBUG_UPDATER
     printError(DEBUG_UPDATER);
@@ -51,20 +59,33 @@ bool UpdaterClass::begin(size_t size){
   _reset();
   _error = 0;
 
-  //size of current sketch rounded to a sector
-  uint32_t currentSketchSize = (ESP.getSketchSize() + FLASH_SECTOR_SIZE - 1) & (~(FLASH_SECTOR_SIZE - 1));
-  //address of the end of the space available for sketch and update
-  uint32_t updateEndAddress = (uint32_t)&_SPIFFS_start - 0x40200000;
-  //size of the update rounded to a sector
-  uint32_t roundedSize = (size + FLASH_SECTOR_SIZE - 1) & (~(FLASH_SECTOR_SIZE - 1));
-  //address where we will start writing the update
-  uint32_t updateStartAddress = updateEndAddress - roundedSize;
+  uint32_t updateStartAddress = 0;
+  if (command == U_FLASH) {
+    //size of current sketch rounded to a sector
+    uint32_t currentSketchSize = (ESP.getSketchSize() + FLASH_SECTOR_SIZE - 1) & (~(FLASH_SECTOR_SIZE - 1));
+    //address of the end of the space available for sketch and update
+    uint32_t updateEndAddress = (uint32_t)&_SPIFFS_start - 0x40200000;
+    //size of the update rounded to a sector
+    uint32_t roundedSize = (size + FLASH_SECTOR_SIZE - 1) & (~(FLASH_SECTOR_SIZE - 1));
+    //address where we will start writing the update
+    updateStartAddress = updateEndAddress - roundedSize;
 
-  //make sure that the size of both sketches is less than the total space (updateEndAddress)
-  if(updateStartAddress < currentSketchSize){
-    _error = UPDATE_ERROR_SPACE;
+    //make sure that the size of both sketches is less than the total space (updateEndAddress)
+    if(updateStartAddress < currentSketchSize) {
+      _error = UPDATE_ERROR_SPACE;
 #ifdef DEBUG_UPDATER
-    printError(DEBUG_UPDATER);
+      printError(DEBUG_UPDATER);
+#endif
+      return false;
+    }
+  }
+  else if (command == U_SPIFFS) {
+     updateStartAddress = (uint32_t)&_SPIFFS_start - 0x40200000;
+  }
+  else {
+    // unknown command
+#ifdef DEBUG_UPDATER
+    DEBUG_UPDATER.println("Unknown update command.");
 #endif
     return false;
   }
@@ -74,6 +95,7 @@ bool UpdaterClass::begin(size_t size){
   _currentAddress = _startAddress;
   _size = size;
   _buffer = new uint8_t[FLASH_SECTOR_SIZE];
+  _command = command;
 
   return true;
 }
@@ -95,23 +117,28 @@ bool UpdaterClass::end(bool evenIfRemaining){
     return false;
   }
 
-  if(evenIfRemaining){
-    if(_bufferLen > 0){
+  if(evenIfRemaining) {
+    if(_bufferLen > 0) {
       _writeBuffer();
     }
     _size = progress();
   }
 
-  eboot_command ebcmd;
-  ebcmd.action = ACTION_COPY_RAW;
-  ebcmd.args[0] = _startAddress;
-  ebcmd.args[1] = 0x00000;
-  ebcmd.args[2] = _size;
-  eboot_command_write(&ebcmd);
+  if (_command == U_FLASH) {
+    eboot_command ebcmd;
+    ebcmd.action = ACTION_COPY_RAW;
+    ebcmd.args[0] = _startAddress;
+    ebcmd.args[1] = 0x00000;
+    ebcmd.args[2] = _size;
+    eboot_command_write(&ebcmd);
 
 #ifdef DEBUG_UPDATER
     DEBUG_UPDATER.printf("Staged: address:0x%08X, size:0x%08X\n", _startAddress, _size);
+  }
+  else if (_command == U_SPIFFS) {
+    DEBUG_UPDATER.printf("SPIFFS: address:0x%08X, size:0x%08X\n", _startAddress, _size);
 #endif
+  }
 
   _reset();
   return true;
diff --git a/cores/esp8266/Updater.h b/cores/esp8266/Updater.h
index c8b4e81f1..670b0e7e9 100644
--- a/cores/esp8266/Updater.h
+++ b/cores/esp8266/Updater.h
@@ -11,6 +11,9 @@
 #define UPDATE_ERROR_SIZE   4
 #define UPDATE_ERROR_STREAM 5
 
+#define U_FLASH   0
+#define U_SPIFFS  100
+
 //#define DEBUG_UPDATER Serial1
 
 class UpdaterClass {
@@ -20,7 +23,7 @@ class UpdaterClass {
       Call this to check the space needed for the update
       Will return false if there is not enough space
     */
-    bool begin(size_t size);
+    bool begin(size_t size, int = U_FLASH);
     
     /*
       Writes a buffer to the flash and increments the address
@@ -116,6 +119,7 @@ class UpdaterClass {
     size_t _size;
     uint32_t _startAddress;
     uint32_t _currentAddress;
+    uint32_t _command;
 };
 
 extern UpdaterClass Update;