diff --git a/cores/esp8266/core_esp8266_eboot_command.c b/cores/esp8266/core_esp8266_eboot_command.c
index 60c92bf18..ee3ccb480 100644
--- a/cores/esp8266/core_esp8266_eboot_command.c
+++ b/cores/esp8266/core_esp8266_eboot_command.c
@@ -60,7 +60,7 @@ int eboot_command_read(struct eboot_command* cmd)
     }
 
     uint32_t crc32 = eboot_command_calculate_crc32(cmd);
-    if (cmd->magic & EBOOT_MAGIC_MASK != EBOOT_MAGIC || 
+    if ((cmd->magic & EBOOT_MAGIC_MASK) != EBOOT_MAGIC ||
         cmd->crc32 != crc32) {
         return 1;
     }
diff --git a/cores/esp8266/core_esp8266_flash_utils.c b/cores/esp8266/core_esp8266_flash_utils.c
index 6f8a34f41..0713998a6 100644
--- a/cores/esp8266/core_esp8266_flash_utils.c
+++ b/cores/esp8266/core_esp8266_flash_utils.c
@@ -28,7 +28,7 @@
 
 int SPIEraseAreaEx(const uint32_t start, const uint32_t size)
 {
-    if (start & (FLASH_SECTOR_SIZE - 1) != 0) {
+    if ((start & (FLASH_SECTOR_SIZE - 1)) != 0) {
         return 1;
     }
 
diff --git a/cores/esp8266/core_esp8266_main.cpp b/cores/esp8266/core_esp8266_main.cpp
index 16902b15c..b67543f8b 100644
--- a/cores/esp8266/core_esp8266_main.cpp
+++ b/cores/esp8266/core_esp8266_main.cpp
@@ -129,7 +129,7 @@ void user_init(void) {
     uart_div_modify(0, UART_CLK_FREQ / (74480));
 
     system_rtc_mem_read(0, &resetInfo, sizeof(struct rst_info));
-    if(resetInfo.reason == WDT_RST_FLAG || resetInfo.reason == EXCEPTION_RST_FLAG) {
+    if(resetInfo.reason == REASON_WDT_RST || resetInfo.reason == REASON_EXCEPTION_RST) {
         os_printf("Last Reset:\n - flag=%d\n - Fatal exception (%d):\n - epc1=0x%08x,epc2=0x%08x,epc3=0x%08x,excvaddr=0x%08x,depc=0x%08x\n", resetInfo.reason, resetInfo.exccause, resetInfo.epc1, resetInfo.epc2, resetInfo.epc3, resetInfo.excvaddr, resetInfo.depc);
     }
     struct rst_info info = { 0 };
diff --git a/cores/esp8266/spiffs/spiffs_config.h b/cores/esp8266/spiffs/spiffs_config.h
index d59ac80b1..fa4bbd7b1 100644
--- a/cores/esp8266/spiffs/spiffs_config.h
+++ b/cores/esp8266/spiffs/spiffs_config.h
@@ -19,8 +19,8 @@
 #define c_memset os_memset
 
 typedef signed short file_t;
-typedef long int s32_t;
-typedef long unsigned int u32_t;
+typedef int32_t s32_t;
+typedef uint32_t u32_t;
 typedef int16_t s16_t;
 typedef uint16_t u16_t;
 typedef int8_t s8_t;
diff --git a/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp b/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp
index 3fd09dace..b589ef737 100644
--- a/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp
+++ b/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp
@@ -69,7 +69,7 @@ int ESP8266WiFiClass::begin(const char* ssid, const char *passphrase, int32_t ch
         mode(WIFI_STA);
     }
 
-    if(!ssid || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
         // fail SSID to long or missing!
         return WL_CONNECT_FAILED;
     }
@@ -178,7 +178,7 @@ void ESP8266WiFiClass::softAP(const char* ssid, const char* passphrase, int chan
         mode(WIFI_AP);
     }
 
-    if(!ssid || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
         // fail SSID to long or missing!
         return;
     }
diff --git a/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp b/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
index 91f03bbc0..34f249637 100644
--- a/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
+++ b/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
@@ -25,6 +25,7 @@
 
 #include "ESP8266WiFiMulti.h"
 #include <limits.h>
+#include <string.h>
 
 ESP8266WiFiMulti::ESP8266WiFiMulti() {
 }
@@ -151,7 +152,7 @@ bool ESP8266WiFiMulti::APlistAdd(const char* ssid, const char *passphrase) {
 
     WifiAPlist_t newAP;
 
-    if(!ssid || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
         // fail SSID to long or missing!
         return false;
     }
@@ -161,21 +162,18 @@ bool ESP8266WiFiMulti::APlistAdd(const char* ssid, const char *passphrase) {
         return false;
     }
 
-    newAP.ssid = (char*) malloc((strlen(ssid) + 1));
+    newAP.ssid = strdup(ssid);
 
     if(!newAP.ssid) {
         return false;
     }
 
-    strcpy(newAP.ssid, ssid);
-
     if(passphrase && *passphrase != 0x00) {
-        newAP.passphrase = (char*) malloc((strlen(passphrase) + 1));
+        newAP.passphrase = strdup(passphrase);
         if(!newAP.passphrase) {
             free(newAP.ssid);
             return false;
         }
-        strcpy(newAP.passphrase, passphrase);
     }
 
     APlist.push_back(newAP);
diff --git a/platform.txt b/platform.txt
index 2695115c2..fe41377ee 100644
--- a/platform.txt
+++ b/platform.txt
@@ -16,7 +16,7 @@ compiler.sdk.path={runtime.platform.path}/tools/sdk/
 compiler.cpreprocessor.flags=-D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ "-I{compiler.sdk.path}/include"
 
 compiler.c.cmd=xtensa-lx106-elf-gcc
-compiler.c.flags=-c -Os -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mtext-section-literals -falign-functions=4 -MMD -std=c99
+compiler.c.flags=-c -Os -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mtext-section-literals -falign-functions=4 -MMD -std=c99 -pedantic
 
 compiler.S.cmd=xtensa-lx106-elf-gcc
 compiler.S.flags=-c -g -x assembler-with-cpp -MMD
@@ -26,7 +26,7 @@ compiler.c.elf.cmd=xtensa-lx106-elf-gcc
 compiler.c.elf.libs=-lm -lgcc -lhal -lphy -lnet80211 -llwip -lwpa -lmain -lpp -lsmartconfig
 
 compiler.cpp.cmd=xtensa-lx106-elf-g++
-compiler.cpp.flags=-c -Os -mlongcalls -mtext-section-literals -fno-exceptions -fno-rtti -falign-functions=4 -std=c++11 -MMD
+compiler.cpp.flags=-c -Os -mlongcalls -mtext-section-literals -fno-exceptions -fno-rtti -falign-functions=4 -std=c++11 -MMD -pedantic
 
 compiler.as.cmd=xtensa-lx106-elf-as
 
diff --git a/tools/sdk/changelog.txt b/tools/sdk/changelog.txt
index b3faa0773..185750669 100644
--- a/tools/sdk/changelog.txt
+++ b/tools/sdk/changelog.txt
@@ -1,3 +1,54 @@
+esp_iot_sdk_v1.1.1_15_06_05 Release Note 
+-------------------------------------------
+
+Resolved Issues（Bugs below are eligible for Bug Bounty Program):
+1.Too short timer which set by os_arm_timer_us may cause crash. [Tommy]
+2.Call os_malloc in low heap situation may cause crash. [MeneerThijs]
+3.Memory leak issue when SSL connection fail. [孙新虎]
+
+Optimization:
+1.Update JSON parser to handle with illegal parameter and illegal calling progress.
+2.Add parameter of user_esp_platform_check_ip in user_websever.c which in IOT_Demo. 
+3.Update UART driver to solve the problem that if send data through UART while ESP8266 startup may cause UART invalid.
+4.Update smartconfig to version 2.2, corresponding phone APP v0.3.2. And update the description and example of smartconfig_start in document "2C_ESP8266__Programming Guide"
+5.Update code in iram to solve the problem that space for text is not enough.
+6.Update PWM driver and provide libpwm.a in esp_iot_sdk, update PWM APIs in "2C_ESP8266__Programming Guide", more details in "Added APIs" below.
+7.Revised issue that multicast may fail in ESP8266 softAP mode.
+8.Update folder "driver",add folder "driver_lib" in \esp_iot_sdk\examples , add "hw_timer.c" about frc1 hardware timer.
+9.Remove useless driver code in IOT_Demo
+10.Update IOT_Demo to use the latest PWM driver in light demo.
+11.Provide liblwip_536.a of which MSS size is 536
+12.Revised issue that boot may fail when 80Mhz SPI clock selected 
+13.Update esp_init_data_default.bin about RF option in \esp_iot_sdk\bin 
+
+Added APIs：
+1.PWM APIs： 
+Updated： pwm_init，add parameter to set PWM channel and GPIO pin 
+Added：
+（1）get_pwm_version：get version information of PWM driver
+（2）pwm_set_period：set PWM period
+（3）pwm_get_period：get PWM period
+Deleted：
+（1）pwm_set_freq：set PWM frequency
+（2）pwm_get_freq：get PWM frequency
+2.Read/write flash with protection
+（1）system_param_save_with_protect：write data into flash with backup protection
+（2）system_param_load：read data which saved into flash with backup protection 
+3.system_get_rst_info：get information about current startup，it is a normal startup or watch dog reset
+4.at_response：set AT response
+5.at_register_response_func：register a callback for user-define AT response.
+6.Update document "2C_ESP8266__Programming Guide" to add description of interrupt definition in ets_sys.h 
+
+AT_v0.25 Release Note: 
+Note: For AT firmware to support FOTA, flash size need to be 1024KB or more than that.
+Optimization:
+1.Add parameter about UDP local port in command "AT+SAVETRANSLINK"
+
+Added AT command： 
+1.AT+CIPDINFO：set configuration whether show remote IP and remote port with “+IPD” or not
+
+
+
 esp_iot_sdk_v1.1.0_15_05_27_p1 Release Note 
 -------------------------------------------
 
diff --git a/tools/sdk/include/ets_sys.h b/tools/sdk/include/ets_sys.h
index 8b118b341..c21826cbd 100644
--- a/tools/sdk/include/ets_sys.h
+++ b/tools/sdk/include/ets_sys.h
@@ -74,6 +74,9 @@ inline uint32_t ETS_INTR_PENDING(void)
 #define ETS_FRC_TIMER1_INTR_ATTACH(func, arg) \
     ets_isr_attach(ETS_FRC_TIMER1_INUM, (int_handler_t)(func), (void *)(arg))
 
+#define ETS_FRC_TIMER1_NMI_INTR_ATTACH(func) \
+	NmiTimSetFunc(func)
+	
 #define ETS_GPIO_INTR_ATTACH(func, arg) \
     ets_isr_attach(ETS_GPIO_INUM, (int_handler_t)(func), (void *)(arg))
 
diff --git a/tools/sdk/include/smartconfig.h b/tools/sdk/include/smartconfig.h
index 4035ad39d..7b1ec90e1 100644
--- a/tools/sdk/include/smartconfig.h
+++ b/tools/sdk/include/smartconfig.h
@@ -24,5 +24,6 @@ typedef void (*sc_callback_t)(sc_status status, void *pdata);
 const char *smartconfig_get_version(void);
 bool smartconfig_start(sc_type type, sc_callback_t cb, ...);
 bool smartconfig_stop(void);
+bool esptouch_set_timeout(uint8 time_s); //15s~255s, offset:45s
 
 #endif
diff --git a/tools/sdk/include/user_interface.h b/tools/sdk/include/user_interface.h
index 7c4706dc4..4e6dc34f7 100644
--- a/tools/sdk/include/user_interface.h
+++ b/tools/sdk/include/user_interface.h
@@ -23,11 +23,12 @@
 #endif
 
 enum rst_reason {
-	DEFAULT_RST_FLAG	= 0,
-	WDT_RST_FLAG	= 1,
-	EXCEPTION_RST_FLAG    = 2,
-	SOFT_RST_FLAG   = 3,
-	DEEP_SLEEP_AWAKE_FLAG	= 4
+	REASON_DEFAULT_RST		= 0,
+	REASON_WDT_RST			= 1,
+	REASON_EXCEPTION_RST	= 2,
+	REASON_SOFT_WDT_RST   	= 3,
+	REASON_SOFT_RESTART 	= 4,
+	REASON_DEEP_SLEEP_AWAKE	= 5
 };
 
 struct rst_info {
@@ -40,6 +41,8 @@ struct rst_info {
 	uint32 depc;
 };
 
+struct rst_info* system_get_rst_info(void);
+
 #define UPGRADE_FW_BIN1         0x00
 #define UPGRADE_FW_BIN2         0x01
 
@@ -129,6 +132,9 @@ void system_phy_set_max_tpw(uint8 max_tpw);
 void system_phy_set_tpw_via_vdd33(uint16 vdd33);
 void system_phy_set_rfoption(uint8 option);
 
+bool system_param_save_with_protect(uint16 start_sec, void *param, uint16 len);
+bool system_param_load(uint16 start_sec, uint16 offset, void *param, uint16 len);
+
 #define NULL_MODE       0x00
 #define STATION_MODE    0x01
 #define SOFTAP_MODE     0x02
diff --git a/tools/sdk/lib/libjson.a b/tools/sdk/lib/libjson.a
index 5a889af73..e8fa9d8da 100644
Binary files a/tools/sdk/lib/libjson.a and b/tools/sdk/lib/libjson.a differ
diff --git a/tools/sdk/lib/liblwip.a b/tools/sdk/lib/liblwip.a
index b4304413a..a6c42f9e9 100644
Binary files a/tools/sdk/lib/liblwip.a and b/tools/sdk/lib/liblwip.a differ
diff --git a/tools/sdk/lib/libmain.a b/tools/sdk/lib/libmain.a
index ec7bb4cdf..90caec3de 100644
Binary files a/tools/sdk/lib/libmain.a and b/tools/sdk/lib/libmain.a differ
diff --git a/tools/sdk/lib/libnet80211.a b/tools/sdk/lib/libnet80211.a
index 0c634acfa..648852e52 100644
Binary files a/tools/sdk/lib/libnet80211.a and b/tools/sdk/lib/libnet80211.a differ
diff --git a/tools/sdk/lib/libpp.a b/tools/sdk/lib/libpp.a
index c2e844b54..e42233ab3 100644
Binary files a/tools/sdk/lib/libpp.a and b/tools/sdk/lib/libpp.a differ
diff --git a/tools/sdk/lib/libsmartconfig.a b/tools/sdk/lib/libsmartconfig.a
index b8feefc98..03f296fd9 100644
Binary files a/tools/sdk/lib/libsmartconfig.a and b/tools/sdk/lib/libsmartconfig.a differ
diff --git a/tools/sdk/lib/libssl.a b/tools/sdk/lib/libssl.a
index d68dc61bb..1608d8484 100644
Binary files a/tools/sdk/lib/libssl.a and b/tools/sdk/lib/libssl.a differ
diff --git a/tools/sdk/lib/libupgrade.a b/tools/sdk/lib/libupgrade.a
index 6eaebbd30..d0d2d5bda 100644
Binary files a/tools/sdk/lib/libupgrade.a and b/tools/sdk/lib/libupgrade.a differ
diff --git a/tools/sdk/lib/libwpa.a b/tools/sdk/lib/libwpa.a
index 39de3f001..c6f1bb620 100644
Binary files a/tools/sdk/lib/libwpa.a and b/tools/sdk/lib/libwpa.a differ
diff --git a/tools/sdk/version b/tools/sdk/version
index a64d2ed43..1aeff03a8 100644
--- a/tools/sdk/version
+++ b/tools/sdk/version
@@ -1 +1 @@
-1.1.0_15_05_27_p1
\ No newline at end of file
+1.1.1_15_06_05
\ No newline at end of file