diff --git a/hardware/tools/esp8266/sdk/include/c_types.h b/hardware/tools/esp8266/sdk/include/c_types.h
index e6c450cdf..7bc0440de 100644
--- a/hardware/tools/esp8266/sdk/include/c_types.h
+++ b/hardware/tools/esp8266/sdk/include/c_types.h
@@ -66,6 +66,7 @@ typedef enum {
 
 #ifdef ICACHE_FLASH
 #define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
+#define ICACHE_RODATA_ATTR __attribute__((section(".irom.text")))
 #else
 #define ICACHE_FLASH_ATTR
 #endif /* ICACHE_FLASH */
diff --git a/hardware/tools/esp8266/sdk/include/espconn.h b/hardware/tools/esp8266/sdk/include/espconn.h
index deabfdce1..e95900791 100644
--- a/hardware/tools/esp8266/sdk/include/espconn.h
+++ b/hardware/tools/esp8266/sdk/include/espconn.h
@@ -87,6 +87,12 @@ struct espconn {
     void *reverse;
 };
 
+enum espconn_option{
+	ESPCONN_REUSEADDR = 1,
+	ESPCONN_NODELAY,
+	ESPCONN_END
+};
+
 /******************************************************************************
  * FunctionName : espconn_connect
  * Description  : The function given as the connect
@@ -132,6 +138,43 @@ sint8 espconn_accept(struct espconn *espconn);
 
 sint8 espconn_create(struct espconn *espconn);
 
+/******************************************************************************
+ * FunctionName : espconn_tcp_get_max_con
+ * Description  : get the number of simulatenously active TCP connections
+ * Parameters   : none
+ * Returns      : none
+*******************************************************************************/
+
+uint8 espconn_tcp_get_max_con(void);
+
+/******************************************************************************
+ * FunctionName : espconn_tcp_set_max_con
+ * Description  : set the number of simulatenously active TCP connections
+ * Parameters   : num -- total number
+ * Returns      : none
+*******************************************************************************/
+
+sint8 espconn_tcp_set_max_con(uint8 num);
+
+/******************************************************************************
+ * FunctionName : espconn_tcp_get_max_con_allow
+ * Description  : get the count of simulatenously active connections on the server
+ * Parameters   : espconn -- espconn to get the count
+ * Returns      : result
+*******************************************************************************/
+
+sint8 espconn_tcp_get_max_con_allow(struct espconn *espconn);
+
+/******************************************************************************
+ * FunctionName : espconn_tcp_set_max_con_allow
+ * Description  : set the count of simulatenously active connections on the server
+ * Parameters   : espconn -- espconn to set the count
+ * 				  num -- support the connection number
+ * Returns      : result
+*******************************************************************************/
+
+sint8 espconn_tcp_set_max_con_allow(struct espconn *espconn, uint8 num);
+
 /******************************************************************************
  * FunctionName : espconn_regist_time
  * Description  : used to specify the time that should be called when don't recv data
@@ -228,6 +271,16 @@ sint8 espconn_regist_disconcb(struct espconn *espconn, espconn_connect_callback
 
 uint32 espconn_port(void);
 
+/******************************************************************************
+ * FunctionName : espconn_set_opt
+ * Description  : access port value for client so that we don't end up bouncing
+ *                all connections at the same time .
+ * Parameters   : none
+ * Returns      : access port value
+*******************************************************************************/
+
+sint8 espconn_set_opt(struct espconn *espconn, uint8 opt);
+
 /******************************************************************************
  * TypedefName : dns_found_callback
  * Description : Callback which is invoked when a hostname is found.
@@ -317,5 +370,21 @@ sint8 espconn_igmp_join(ip_addr_t *host_ip, ip_addr_t *multicast_ip);
 *******************************************************************************/
 sint8 espconn_igmp_leave(ip_addr_t *host_ip, ip_addr_t *multicast_ip);
 
+/******************************************************************************
+ * FunctionName : espconn_recv_hold
+ * Description  : hold tcp receive
+ * Parameters   : espconn -- espconn to hold
+ * Returns      : none
+*******************************************************************************/
+sint8 espconn_recv_hold(struct espconn *pespconn);
+
+/******************************************************************************
+ * FunctionName : espconn_recv_unhold
+ * Description  : unhold tcp receive
+ * Parameters   : espconn -- espconn to unhold
+ * Returns      : none
+*******************************************************************************/
+sint8 espconn_recv_unhold(struct espconn *pespconn);
+
 #endif
 
diff --git a/hardware/tools/esp8266/sdk/include/ets_sys.h b/hardware/tools/esp8266/sdk/include/ets_sys.h
index 5b4c62480..2244240af 100644
--- a/hardware/tools/esp8266/sdk/include/ets_sys.h
+++ b/hardware/tools/esp8266/sdk/include/ets_sys.h
@@ -36,6 +36,10 @@ typedef struct _ETSTIMER_ {
 } ETSTimer;
 
 /* interrupt related */
+
+typedef void (*int_handler_t)(void*);
+
+#define ETS_SPI_INUM	   2
 #define ETS_GPIO_INUM       4
 #define ETS_UART_INUM       5
 #define ETS_UART1_INUM      5
@@ -48,13 +52,16 @@ typedef struct _ETSTIMER_ {
     ets_intr_unlock()
 
 #define ETS_FRC_TIMER1_INTR_ATTACH(func, arg) \
-    ets_isr_attach(ETS_FRC_TIMER1_INUM, (void *)(func), (void *)(arg))
+    ets_isr_attach(ETS_FRC_TIMER1_INUM, (int_handler_t)(func), (void *)(arg))
 
 #define ETS_GPIO_INTR_ATTACH(func, arg) \
-    ets_isr_attach(ETS_GPIO_INUM, (void *)(func), (void *)(arg))
+    ets_isr_attach(ETS_GPIO_INUM, (int_handler_t)(func), (void *)(arg))
 
 #define ETS_UART_INTR_ATTACH(func, arg) \
-    ets_isr_attach(ETS_UART_INUM, (void *)(func), (void *)(arg))
+    ets_isr_attach(ETS_UART_INUM, (int_handler_t)(func), (void *)(arg))
+
+#define ETS_SPI_INTR_ATTACH(func, arg) \
+    ets_isr_attach(ETS_SPI_INUM, (int_handler_t)(func), (void *)(arg))
 
 #define ETS_INTR_ENABLE(inum) \
     ets_isr_unmask((1<<inum))
@@ -62,6 +69,9 @@ typedef struct _ETSTIMER_ {
 #define ETS_INTR_DISABLE(inum) \
     ets_isr_mask((1<<inum))
 
+#define ETS_SPI_INTR_ENABLE() \
+    ETS_INTR_ENABLE(ETS_SPI_INUM)
+
 #define ETS_UART_INTR_ENABLE() \
     ETS_INTR_ENABLE(ETS_UART_INUM)
 
@@ -105,7 +115,7 @@ void ets_install_putc1(void* routine);
 void uart_div_modify(int no, int freq);
 void ets_isr_mask(int intr);
 void ets_isr_unmask(int intr);
-void ets_isr_attach(int intr, void *handler, void *arg);
+void ets_isr_attach(int intr, int_handler_t handler, void *arg);
 void ets_intr_lock();
 void ets_intr_unlock();
 
diff --git a/hardware/tools/esp8266/sdk/include/ip_addr.h b/hardware/tools/esp8266/sdk/include/ip_addr.h
index bd757a49b..728a75c46 100644
--- a/hardware/tools/esp8266/sdk/include/ip_addr.h
+++ b/hardware/tools/esp8266/sdk/include/ip_addr.h
@@ -52,6 +52,11 @@ struct ip_info {
 #define ip4_addr3_16(ipaddr) ((uint16)ip4_addr3(ipaddr))
 #define ip4_addr4_16(ipaddr) ((uint16)ip4_addr4(ipaddr))
 
+
+/** 255.255.255.255 */
+#define IPADDR_NONE         ((uint32)0xffffffffUL)
+/** 0.0.0.0 */
+#define IPADDR_ANY          ((uint32)0x00000000UL)
 uint32 ipaddr_addr(const char *cp);
 
 #define IP2STR(ipaddr) ip4_addr1_16(ipaddr), \
diff --git a/hardware/tools/esp8266/sdk/include/osapi.h b/hardware/tools/esp8266/sdk/include/osapi.h
index 51c185f6e..5fbdf0da2 100644
--- a/hardware/tools/esp8266/sdk/include/osapi.h
+++ b/hardware/tools/esp8266/sdk/include/osapi.h
@@ -42,8 +42,16 @@
 #define os_timer_setfn ets_timer_setfn
 
 #define os_sprintf  ets_sprintf
-#define os_printf  ets_printf
 #define os_update_cpu_frequency ets_update_cpu_frequency
 
+#ifdef USE_OPTIMIZE_PRINTF
+#define os_printf(fmt, ...) do {	\
+	static const char flash_str[] ICACHE_RODATA_ATTR = fmt;	\
+	os_printf_plus(flash_str, ##__VA_ARGS__);	\
+	} while(0)
+#else
+#define os_printf	os_printf_plus
+#endif
+
 #endif
 
diff --git a/hardware/tools/esp8266/sdk/include/ping.h b/hardware/tools/esp8266/sdk/include/ping.h
new file mode 100644
index 000000000..4ecd032b8
--- /dev/null
+++ b/hardware/tools/esp8266/sdk/include/ping.h
@@ -0,0 +1,32 @@
+#ifndef __PING_H__
+#define __PING_H__
+
+
+typedef void (* ping_recv_function)(void* arg, void *pdata);
+typedef void (* ping_sent_function)(void* arg, void *pdata);
+
+struct ping_option{
+	uint32 count;
+	uint32 ip;
+	uint32 coarse_time;
+	ping_recv_function recv_function;
+	ping_sent_function sent_function;
+	void* reverse;
+};
+
+struct ping_resp{
+	uint32 total_count;
+	uint32 resp_time;
+	uint32 seqno;
+	uint32 timeout_count;
+	uint32 bytes;
+	uint32 total_bytes;
+	uint32 total_time;
+	sint8  ping_err;
+};
+
+bool ping_start(struct ping_option *ping_opt);
+bool ping_regist_recv(struct ping_option *ping_opt, ping_recv_function ping_recv);
+bool ping_regist_sent(struct ping_option *ping_opt, ping_sent_function ping_sent);
+
+#endif /* __PING_H__ */
diff --git a/hardware/tools/esp8266/sdk/include/smartconfig.h b/hardware/tools/esp8266/sdk/include/smartconfig.h
new file mode 100644
index 000000000..02a1e3174
--- /dev/null
+++ b/hardware/tools/esp8266/sdk/include/smartconfig.h
@@ -0,0 +1,28 @@
+/*
+ *  Copyright (C) 2015 -2018  Espressif System
+ *
+ */
+
+#ifndef __SMARTCONFIG_H__
+#define __SMARTCONFIG_H__
+
+typedef void (*sc_callback_t)(void *data);
+
+typedef enum  {
+    SC_STATUS_FIND_CHANNEL = 0,
+    SC_STATUS_GETTING_SSID_PSWD,
+    SC_STATUS_GOT_SSID_PSWD,
+    SC_STATUS_LINK,
+} sc_status;
+
+typedef enum  {
+    SC_TYPE_ESPTOUCH = 0,
+    SC_TYPE_AIRKISS,
+} sc_type;
+
+sc_status smartconfig_get_status(void);
+const char *smartconfig_get_version(void);
+bool smartconfig_start(sc_type type, sc_callback_t cb);
+bool smartconfig_stop(void);
+
+#endif
diff --git a/hardware/tools/esp8266/sdk/include/spi_flash.h b/hardware/tools/esp8266/sdk/include/spi_flash.h
index 9dbe10a27..12dd6e174 100644
--- a/hardware/tools/esp8266/sdk/include/spi_flash.h
+++ b/hardware/tools/esp8266/sdk/include/spi_flash.h
@@ -23,6 +23,7 @@ typedef struct{
 
 #define SPI_FLASH_SEC_SIZE      4096
 
+uint32 spi_flash_get_id(void);
 SpiFlashOpResult spi_flash_erase_sector(uint16 sec);
 SpiFlashOpResult spi_flash_write(uint32 des_addr, uint32 *src_addr, uint32 size);
 SpiFlashOpResult spi_flash_read(uint32 src_addr, uint32 *des_addr, uint32 size);
diff --git a/hardware/tools/esp8266/sdk/include/user_interface.h b/hardware/tools/esp8266/sdk/include/user_interface.h
index f261735b2..4f8ab688d 100644
--- a/hardware/tools/esp8266/sdk/include/user_interface.h
+++ b/hardware/tools/esp8266/sdk/include/user_interface.h
@@ -41,33 +41,17 @@ struct rst_info{
 #define UPGRADE_FW_BIN1         0x00
 #define UPGRADE_FW_BIN2         0x01
 
-typedef void (*upgrade_states_check_callback)(void * arg);
-
-struct upgrade_server_info {
-    uint8 ip[4];
-    uint16 port;
-
-    uint8 upgrade_flag;
-
-    uint8 pre_version[8];
-    uint8 upgrade_version[8];
-
-    uint32 check_times;
-    uint8 *url;
-
-    upgrade_states_check_callback check_cb;
-    struct espconn *pespconn;
-};
-
-bool system_upgrade_start(struct upgrade_server_info *server);
-bool system_upgrade_start_ssl(struct upgrade_server_info *server);
-uint8 system_upgrade_userbin_check(void);
-void system_upgrade_reboot(void);
-
 void system_restore(void);
 void system_restart(void);
+
+bool system_deep_sleep_set_option(uint8 option);
 void system_deep_sleep(uint32 time_in_us);
 
+uint8 system_upgrade_userbin_check(void);
+void system_upgrade_reboot(void);
+uint8 system_upgrade_flag_check();
+void system_upgrade_flag_set(uint8 flag);
+
 void system_timer_reinit(void);
 uint32 system_get_time(void);
 
@@ -79,13 +63,14 @@ enum {
     USER_TASK_PRIO_MAX
 };
 
-void system_os_task(os_task_t task, uint8 prio, os_event_t *queue, uint8 qlen);
-void system_os_post(uint8 prio, os_signal_t sig, os_param_t par);
+bool system_os_task(os_task_t task, uint8 prio, os_event_t *queue, uint8 qlen);
+bool system_os_post(uint8 prio, os_signal_t sig, os_param_t par);
 
 void system_print_meminfo(void);
 uint32 system_get_free_heap_size(void);
 
 void system_set_os_print(uint8 onoff);
+uint8 system_get_os_print();
 
 uint64 system_mktime(uint32 year, uint32 mon, uint32 day, uint32 hour, uint32 min, uint32 sec);
 
@@ -105,11 +90,22 @@ void system_uart_swap(void);
 
 uint16 system_adc_read(void);
 
+const char *system_get_sdk_version(void);
+
 #define NULL_MODE       0x00
 #define STATION_MODE    0x01
 #define SOFTAP_MODE     0x02
 #define STATIONAP_MODE  0x03
 
+typedef enum _auth_mode {
+    AUTH_OPEN           = 0,
+    AUTH_WEP,
+    AUTH_WPA_PSK,
+    AUTH_WPA2_PSK,
+    AUTH_WPA_WPA2_PSK,
+    AUTH_MAX
+} AUTH_MODE;
+
 uint8 wifi_get_opmode(void);
 bool wifi_set_opmode(uint8 opmode);
 
@@ -120,7 +116,7 @@ struct bss_info {
     uint8 ssid[32];
     uint8 channel;
     sint8 rssi;
-    uint8 authmode;
+    AUTH_MODE authmode;
     uint8 is_hidden;
 };
 
@@ -138,7 +134,8 @@ typedef void (* scan_done_cb_t)(void *arg, STATUS status);
 struct station_config {
     uint8 ssid[32];
     uint8 password[64];
-    uint8 bssid_set;
+    uint8 bssid_set;	// Note: If bssid_set is 1, station will just connect to the router
+                        // with both ssid[] and bssid[] matched. Please check about this.
     uint8 bssid[6];
 };
 
@@ -149,10 +146,10 @@ bool wifi_station_connect(void);
 bool wifi_station_disconnect(void);
 
 struct scan_config {
-    uint8 *ssid;
-    uint8 *bssid;
-    uint8 channel;
-    uint8 show_hidden;
+    uint8 *ssid;	// Note: ssid == NULL, don't filter ssid.
+    uint8 *bssid;	// Note: bssid == NULL, don't filter bssid.
+    uint8 channel;	// Note: channel == 0, scan all channels, otherwise scan set channel.
+    uint8 show_hidden;	// Note: show_hidden == 1, can get hidden ssid routers' info.
 };
 
 bool wifi_station_scan(struct scan_config *config, scan_done_cb_t cb);
@@ -169,6 +166,11 @@ enum {
     STATION_GOT_IP
 };
 
+enum dhcp_status {
+	DHCP_STOPPED,
+	DHCP_STARTED
+};
+
 uint8 wifi_station_get_connect_status(void);
 
 uint8 wifi_station_get_current_ap_id(void);
@@ -177,23 +179,17 @@ bool wifi_station_ap_number_set(uint8 ap_number);
 
 bool wifi_station_dhcpc_start(void);
 bool wifi_station_dhcpc_stop(void);
-
-typedef enum _auth_mode {
-    AUTH_OPEN           = 0,
-    AUTH_WEP,
-    AUTH_WPA_PSK,
-    AUTH_WPA2_PSK,
-    AUTH_WPA_WPA2_PSK
-} AUTH_MODE;
+enum dhcp_status wifi_station_dhcpc_status(void);
 
 struct softap_config {
     uint8 ssid[32];
     uint8 password[64];
-    uint8 ssid_len;
-    uint8 channel;
-    uint8 authmode;
-    uint8 ssid_hidden;
-    uint8 max_connection;
+    uint8 ssid_len;	// Note: Recommend to set it according to your ssid
+    uint8 channel;	// Note: support 1 ~ 13
+    AUTH_MODE authmode;	// Note: Don't support AUTH_WEP in softAP mode.
+    uint8 ssid_hidden;	// Note: default 0
+    uint8 max_connection;	// Note: default 4, max 4
+    uint16 beacon_interval;	// Note: support 100 ~ 60000 ms, default 100
 };
 
 bool wifi_softap_get_config(struct softap_config *config);
@@ -213,10 +209,12 @@ struct dhcps_lease {
 
 struct station_info * wifi_softap_get_station_info(void);
 void wifi_softap_free_station_info(void);
+uint8 wifi_station_get_ap_info(struct station_config config[]);
 
 bool wifi_softap_dhcps_start(void);
 bool wifi_softap_dhcps_stop(void);
 bool wifi_softap_set_dhcps_lease(struct dhcps_lease *please);
+enum dhcp_status wifi_softap_dhcps_status(void);
 
 #define STATION_IF      0x00
 #define SOFTAP_IF       0x01
@@ -230,6 +228,7 @@ uint8 wifi_get_channel(void);
 bool wifi_set_channel(uint8 channel);
 
 void wifi_status_led_install(uint8 gpio_id, uint32 gpio_name, uint8 gpio_func);
+void wifi_status_led_uninstall();
 
 /** Get the absolute difference between 2 u32_t values (correcting overflows)
  * 'a' is expected to be 'higher' (without overflow) than 'b'. */
@@ -250,4 +249,13 @@ enum phy_mode {
 enum phy_mode wifi_get_phy_mode(void);
 bool wifi_set_phy_mode(enum phy_mode mode);
 
+enum sleep_type {
+	NONE_SLEEP_T	= 0,
+	LIGHT_SLEEP_T,
+	MODEM_SLEEP_T
+};
+
+bool wifi_set_sleep_type(enum sleep_type type);
+enum sleep_type wifi_get_sleep_type(void);
+
 #endif
diff --git a/hardware/tools/esp8266/sdk/include/version.h b/hardware/tools/esp8266/sdk/include/version.h
deleted file mode 100644
index f6866a012..000000000
--- a/hardware/tools/esp8266/sdk/include/version.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __SDK_VERSION_H__
-#define __SDK_VERSION_H__
-
-#define SDK_VERSION_MAJOR		0U
-#define SDK_VERSION_MINOR		9U
-#define SDK_VERSION_REVISION	3U
-#define SDK_VERSION_INTERNAL    0U
-
-#define SDK_VERSION   (SDK_VERSION_MAJOR << 16   | SDK_VERSION_MINOR << 8 | SDK_VERSION_REVISION)
-
-#endif
-
diff --git a/hardware/tools/esp8266/sdk/ld/eagle.rom.addr.v6.ld b/hardware/tools/esp8266/sdk/ld/eagle.rom.addr.v6.ld
index c61f176a7..412232bae 100644
--- a/hardware/tools/esp8266/sdk/ld/eagle.rom.addr.v6.ld
+++ b/hardware/tools/esp8266/sdk/ld/eagle.rom.addr.v6.ld
@@ -17,6 +17,9 @@ PROVIDE ( SHA1Init = 0x4000b584 );
 PROVIDE ( SHA1Transform = 0x4000a364 );
 PROVIDE ( SHA1Update = 0x4000b5a8 );
 PROVIDE ( Wait_SPI_Idle = 0x4000448c );
+PROVIDE ( SPI_read_status = 0x400043c8 );
+PROVIDE ( SPI_write_status = 0x40004400 );
+PROVIDE ( SPI_write_enable = 0x4000443c );
 PROVIDE ( SPIEraseArea = 0x40004b44 );
 PROVIDE ( SPIEraseBlock = 0x400049b4 );
 PROVIDE ( SPIEraseChip = 0x40004984 );
diff --git a/hardware/tools/esp8266/sdk/lib/liblwip.a b/hardware/tools/esp8266/sdk/lib/liblwip.a
index 794a84a69..6ef795bb5 100644
Binary files a/hardware/tools/esp8266/sdk/lib/liblwip.a and b/hardware/tools/esp8266/sdk/lib/liblwip.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libmain.a b/hardware/tools/esp8266/sdk/lib/libmain.a
index f552fff2d..b0b90f98b 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libmain.a and b/hardware/tools/esp8266/sdk/lib/libmain.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libnet80211.a b/hardware/tools/esp8266/sdk/lib/libnet80211.a
index 63d443738..5ae2da5c5 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libnet80211.a and b/hardware/tools/esp8266/sdk/lib/libnet80211.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libphy.a b/hardware/tools/esp8266/sdk/lib/libphy.a
index 5679e419c..1598f206f 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libphy.a and b/hardware/tools/esp8266/sdk/lib/libphy.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libpp.a b/hardware/tools/esp8266/sdk/lib/libpp.a
index 13dafb7da..174662057 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libpp.a and b/hardware/tools/esp8266/sdk/lib/libpp.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libsmartconfig.a b/hardware/tools/esp8266/sdk/lib/libsmartconfig.a
new file mode 100644
index 000000000..f402b5f3b
Binary files /dev/null and b/hardware/tools/esp8266/sdk/lib/libsmartconfig.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libssl.a b/hardware/tools/esp8266/sdk/lib/libssl.a
index a51d04a61..36b78fe26 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libssl.a and b/hardware/tools/esp8266/sdk/lib/libssl.a differ
diff --git a/hardware/tools/esp8266/sdk/lib/libwpa.a b/hardware/tools/esp8266/sdk/lib/libwpa.a
index dcf924897..abd611b4f 100644
Binary files a/hardware/tools/esp8266/sdk/lib/libwpa.a and b/hardware/tools/esp8266/sdk/lib/libwpa.a differ
diff --git a/hardware/tools/esp8266/sdk/version b/hardware/tools/esp8266/sdk/version
index b3ec1638f..03834411d 100644
--- a/hardware/tools/esp8266/sdk/version
+++ b/hardware/tools/esp8266/sdk/version
@@ -1 +1 @@
-0.9.3
\ No newline at end of file
+0.9.5
\ No newline at end of file