diff --git a/hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_main.cpp b/hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_main.cpp
index 16902b15c..b67543f8b 100644
--- a/hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_main.cpp
+++ b/hardware/esp8266com/esp8266/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/hardware/esp8266com/esp8266/tools/sdk/changelog.txt b/hardware/esp8266com/esp8266/tools/sdk/changelog.txt
index b3faa0773..185750669 100644
--- a/hardware/esp8266com/esp8266/tools/sdk/changelog.txt
+++ b/hardware/esp8266com/esp8266/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/hardware/esp8266com/esp8266/tools/sdk/include/ets_sys.h b/hardware/esp8266com/esp8266/tools/sdk/include/ets_sys.h
index 8b118b341..c21826cbd 100644
--- a/hardware/esp8266com/esp8266/tools/sdk/include/ets_sys.h
+++ b/hardware/esp8266com/esp8266/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/hardware/esp8266com/esp8266/tools/sdk/include/smartconfig.h b/hardware/esp8266com/esp8266/tools/sdk/include/smartconfig.h
index 4035ad39d..7b1ec90e1 100644
--- a/hardware/esp8266com/esp8266/tools/sdk/include/smartconfig.h
+++ b/hardware/esp8266com/esp8266/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/hardware/esp8266com/esp8266/tools/sdk/include/user_interface.h b/hardware/esp8266com/esp8266/tools/sdk/include/user_interface.h
index 7c4706dc4..4e6dc34f7 100644
--- a/hardware/esp8266com/esp8266/tools/sdk/include/user_interface.h
+++ b/hardware/esp8266com/esp8266/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/hardware/esp8266com/esp8266/tools/sdk/lib/libjson.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libjson.a
index 5a889af73..e8fa9d8da 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libjson.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libjson.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/liblwip.a b/hardware/esp8266com/esp8266/tools/sdk/lib/liblwip.a
index b4304413a..a6c42f9e9 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/liblwip.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/liblwip.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libmain.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libmain.a
index ec7bb4cdf..90caec3de 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libmain.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libmain.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libnet80211.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libnet80211.a
index 0c634acfa..648852e52 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libnet80211.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libnet80211.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libpp.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libpp.a
index c2e844b54..e42233ab3 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libpp.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libpp.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libsmartconfig.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libsmartconfig.a
index b8feefc98..03f296fd9 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libsmartconfig.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libsmartconfig.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libssl.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libssl.a
index d68dc61bb..1608d8484 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libssl.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libssl.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libupgrade.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libupgrade.a
index 6eaebbd30..d0d2d5bda 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libupgrade.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libupgrade.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/lib/libwpa.a b/hardware/esp8266com/esp8266/tools/sdk/lib/libwpa.a
index 39de3f001..c6f1bb620 100644
Binary files a/hardware/esp8266com/esp8266/tools/sdk/lib/libwpa.a and b/hardware/esp8266com/esp8266/tools/sdk/lib/libwpa.a differ
diff --git a/hardware/esp8266com/esp8266/tools/sdk/version b/hardware/esp8266com/esp8266/tools/sdk/version
index a64d2ed43..1aeff03a8 100644
--- a/hardware/esp8266com/esp8266/tools/sdk/version
+++ b/hardware/esp8266com/esp8266/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