diff --git a/README.md b/README.md
index 7bec8688..88e9cd09 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # **NodeMcu** #
-version 0.9.4
+version 0.9.5
 ###A lua based firmware for wifi-soc esp8266
-Build on [ESP8266 sdk 0.9.4](http://bbs.espressif.com/viewtopic.php?f=5&t=90)<br />
+Build on [ESP8266 sdk 0.9.5](http://bbs.espressif.com/viewtopic.php?f=7&t=104)<br />
 Lua core based on [eLua project](http://www.eluaproject.net/)<br />
 File system based on [spiffs](https://github.com/pellepl/spiffs)<br />
 Open source development kit for NodeMCU [nodemcu-devkit](https://github.com/nodemcu/nodemcu-devkit)<br />
@@ -13,6 +13,13 @@ bbs: [中文论坛Chinese bbs](http://bbs.nodemcu.com)<br />
 Tencent QQ group QQ群: 309957875<br />
 
 # Change log
+2015-01-05<br />
+update sdk to 0.9.5.<br />
+pre_build bin now compiled by gcc toolchain.<br />
+memory/heap usage optimized.<br />
+add support for multiple platform and toolchain include eclipse. <br />
+combine firmware for 512K, 1M, 2M, 4M flash to one. flash size auto-detected.
+
 2014-12-30<br />
 modify uart.on api, when run_input set to 0, uart.on now can read raw data from uart.<br />
 serial input now accept non-ascii chars.<br />
@@ -101,10 +108,11 @@ add tmr.time() api to get rtc time and calibration.
 ####*GNU toolchain is not tested*
 ####file ./app/include/user_config.h
 ```c
-#define FLASH_512K
+// #define FLASH_512K
 // #define FLASH_1M
 // #define FLASH_2M
 // #define FLASH_4M
+#define FLASH_AUTOSIZE
 ...
 #define LUA_USE_MODULES
 #ifdef LUA_USE_MODULES
@@ -119,12 +127,12 @@ add tmr.time() api to get rtc time and calibration.
 #define LUA_USE_MODULES_ADC
 #define LUA_USE_MODULES_UART
 #define LUA_USE_MODULES_OW
-//#define LUA_USE_MODULES_BIT
+#define LUA_USE_MODULES_BIT
 #endif /* LUA_USE_MODULES */
 ```
 
 #Flash the firmware
-nodemcu_512k.bin: 0x00000<br />
+nodemcu_latest.bin: 0x00000<br />
 for most esp8266 modules, just pull GPIO0 down and restart.<br />
 You can use the [nodemcu-flasher](https://github.com/nodemcu/nodemcu-flasher) to burn the firmware.
 
diff --git a/app/platform/flash_api.c b/app/platform/flash_api.c
index c5f26d40..47a35ec6 100644
--- a/app/platform/flash_api.c
+++ b/app/platform/flash_api.c
@@ -171,6 +171,20 @@ uint32_t flash_get_speed(void)
     return speed;
 }
 
+bool flash_init_data_written(void)
+{
+    // FLASH SEC - 4
+    // Dangerous, here are dinosaur infested!!!!!
+    // Reboot required!!!
+    // It will init system data to default!
+    uint32_t data[2] ICACHE_STORE_ATTR;
+    SPIRead((flash_get_sec_num() - 4) * SPI_FLASH_SEC_SIZE, data, sizeof(data));
+    if(data[0] == 0xFFFFFFFF && data[1] == 0xFFFFFFFF) {
+        return false;
+    }
+    return true;
+}
+
 bool flash_init_data_default(void)
 {
     // FLASH SEC - 4
diff --git a/app/platform/flash_api.h b/app/platform/flash_api.h
index bbdd7530..593741c8 100644
--- a/app/platform/flash_api.h
+++ b/app/platform/flash_api.h
@@ -41,6 +41,7 @@ bool flash_set_size_byte(uint32_t);
 uint16_t flash_get_sec_num(void);
 uint8_t flash_get_mode(void);
 uint32_t flash_get_speed(void);
+bool flash_init_data_written(void);
 bool flash_init_data_default(void);
 bool flash_init_data_blank(void);
 bool flash_self_destruct(void);
diff --git a/app/user/user_main.c b/app/user/user_main.c
index c6ea7d84..b6b141b8 100644
--- a/app/user/user_main.c
+++ b/app/user/user_main.c
@@ -96,6 +96,10 @@ void user_init(void)
     // test_romfs();
 #elif defined ( BUILD_SPIFFS )
     spiffs_mount();
+    if(!flash_init_data_written()){
+        NODE_ERR("Restore init data.\n");
+        flash_init_data_default();
+    }
     // test_spiffs();
 #endif
     // endpoint_setup();
diff --git a/pre_build/0.9.5/nodemcu_20150105.bin b/pre_build/0.9.5/nodemcu_20150105.bin
new file mode 100644
index 00000000..fd9f281c
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diff --git a/pre_build/0.9.5/nodemcu_latest.bin b/pre_build/0.9.5/nodemcu_latest.bin
new file mode 100644
index 00000000..fd9f281c
Binary files /dev/null and b/pre_build/0.9.5/nodemcu_latest.bin differ
diff --git a/pre_build/latest/nodemcu_512k_latest.bin b/pre_build/latest/nodemcu_512k_latest.bin
index c546e899..fd9f281c 100644
Binary files a/pre_build/latest/nodemcu_512k_latest.bin and b/pre_build/latest/nodemcu_512k_latest.bin differ
diff --git a/pre_build/latest/nodemcu_latest.bin b/pre_build/latest/nodemcu_latest.bin
new file mode 100644
index 00000000..fd9f281c
Binary files /dev/null and b/pre_build/latest/nodemcu_latest.bin differ