From 703ab8df641c0028245d400cf9d1b2d609571f13 Mon Sep 17 00:00:00 2001
From: John Doe <ficeto@Hristos-Mac-mini-2.local>
Date: Sat, 4 Jul 2015 01:20:33 +0300
Subject: [PATCH] make Update erase/write sector by sector as well

---
 cores/esp8266/Updater.cpp                     | 26 +++++++++----------
 .../examples/WebUpdate/WebUpdate.ino          |  4 +++
 2 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/cores/esp8266/Updater.cpp b/cores/esp8266/Updater.cpp
index aba181fe7..e9ecd5d5d 100644
--- a/cores/esp8266/Updater.cpp
+++ b/cores/esp8266/Updater.cpp
@@ -51,18 +51,6 @@ bool UpdaterClass::begin(size_t size){
     return false;
   }
   
-  //erase the neede space
-  noInterrupts();
-  int rc = SPIEraseAreaEx(updateStartAddress, roundedSize);
-  interrupts();
-  if (rc){
-    _error = UPDATE_ERROR_ERASE;
-#ifdef DEBUG_UPDATER
-    printError(DEBUG_UPDATER);
-#endif
-    return false;
-  }
-  
   //initialize
   _startAddress = updateStartAddress;
   _currentAddress = _startAddress;
@@ -122,7 +110,19 @@ bool UpdaterClass::end(bool evenIfRemaining){
 bool UpdaterClass::_writeBuffer(){
   WDT_FEED();
   noInterrupts();
-  int rc = SPIWrite(_currentAddress, _buffer, _bufferLen);
+  int rc = SPIEraseSector(_currentAddress/FLASH_SECTOR_SIZE);
+  interrupts();
+  if (rc){
+    _error = UPDATE_ERROR_ERASE;
+#ifdef DEBUG_UPDATER
+    printError(DEBUG_UPDATER);
+#endif
+    return false;
+  }
+  
+  WDT_FEED();
+  noInterrupts();
+  rc = SPIWrite(_currentAddress, _buffer, _bufferLen);
   interrupts();
   if (rc) {
     _error = UPDATE_ERROR_WRITE;
diff --git a/libraries/ESP8266WebServer/examples/WebUpdate/WebUpdate.ino b/libraries/ESP8266WebServer/examples/WebUpdate/WebUpdate.ino
index 4962b35e8..665dd6199 100644
--- a/libraries/ESP8266WebServer/examples/WebUpdate/WebUpdate.ino
+++ b/libraries/ESP8266WebServer/examples/WebUpdate/WebUpdate.ino
@@ -1,3 +1,7 @@
+/*
+  To upload through terminal you can use: curl -F "image=@firmware.bin" esp8266-webupdate.local/update
+*/
+
 #include <ESP8266WiFi.h>
 #include <WiFiClient.h>
 #include <ESP8266WebServer.h>