diff --git a/app/coap/coap.h b/app/coap/coap.h
index f47123f2..dc4bb6d9 100644
--- a/app/coap/coap.h
+++ b/app/coap/coap.h
@@ -192,6 +192,11 @@ void coap_setup(void);
 void endpoint_setup(void);
 
 int coap_buildOptionHeader(uint32_t optDelta, size_t length, uint8_t *buf, size_t buflen);
+int check_token(coap_packet_t *pkt);
+
+#include "uri.h"
+int coap_make_request(coap_rw_buffer_t *scratch, coap_packet_t *pkt, coap_msgtype_t t, coap_method_t m, coap_uri_t *uri, const uint8_t *payload, size_t payload_len);
+
 
 #ifdef __cplusplus
 }
diff --git a/app/driver/key.c b/app/driver/key.c
index d05c4aca..afd7b142 100644
--- a/app/driver/key.c
+++ b/app/driver/key.c
@@ -17,7 +17,7 @@
 
 #include "driver/key.h"
 
-LOCAL void key_intr_handler(struct keys_param *keys);
+LOCAL void ICACHE_RAM_ATTR key_intr_handler(void *arg);
 
 /******************************************************************************
  * FunctionName : key_init_single
@@ -130,8 +130,9 @@ key_50ms_cb(struct single_key_param *single_key)
  * Returns      : none
 *******************************************************************************/
 LOCAL void
-key_intr_handler(struct keys_param *keys)
+key_intr_handler(void *arg)
 {
+    struct keys_param *keys = arg;
     uint8 i;
     uint32 gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);
 
diff --git a/app/driver/pwm.c b/app/driver/pwm.c
index c34f1437..07469dd9 100644
--- a/app/driver/pwm.c
+++ b/app/driver/pwm.c
@@ -306,8 +306,9 @@ pwm_get_freq(uint8 channel)
  * Returns      : NONE
 *******************************************************************************/
 LOCAL void ICACHE_RAM_ATTR
-pwm_tim1_intr_handler(void)
+pwm_tim1_intr_handler(void *p)
 {
+    (void)p;
     uint8 local_toggle = pwm_toggle;                        // pwm_toggle may change outside
     RTC_CLR_REG_MASK(FRC1_INT_ADDRESS, FRC1_INT_CLR_MASK);
 
diff --git a/app/include/driver/spi.h b/app/include/driver/spi.h
index bb8e0314..04ae1fe6 100644
--- a/app/include/driver/spi.h
+++ b/app/include/driver/spi.h
@@ -2,7 +2,7 @@
 #define SPI_APP_H
 
 #include "spi_register.h"
-#include "ets_sys.h"
+#include "rom.h"
 #include "osapi.h"
 #include "uart.h"
 #include "os_type.h"
diff --git a/app/include/rom.h b/app/include/rom.h
index ba48fcb7..5b8641dd 100644
--- a/app/include/rom.h
+++ b/app/include/rom.h
@@ -4,6 +4,7 @@
 #define _ROM_H_
 
 #include "c_types.h"
+#include "ets_sys.h"
 
 // SHA1 is assumed to match the netbsd sha1.h headers
 #define SHA1_DIGEST_LENGTH		20
@@ -44,7 +45,7 @@ extern unsigned char * base64_decode(const unsigned char *src, size_t len, size_
 extern void mem_init(void * start_addr);
 
 // Interrupt Service Routine functions
-typedef void (*ets_isr_fn) (void *arg, uint32_t sp);
+typedef void (*ets_isr_fn) (void *arg);
 extern int ets_isr_attach (unsigned int interrupt, ets_isr_fn, void *arg);
 extern void ets_isr_mask (unsigned intr);
 extern void ets_isr_unmask (unsigned intr);
@@ -108,4 +109,35 @@ typedef void (*exception_handler_fn) (struct exception_frame *ef, uint32_t cause
  */
 exception_handler_fn _xtos_set_exception_handler (uint32_t cause, exception_handler_fn handler);
 
+
+void ets_update_cpu_frequency (uint32_t mhz);
+uint32_t ets_get_cpu_frequency (void);
+
+void *ets_memcpy (void *dst, const void *src, size_t n);
+void *ets_memmove (void *dst, const void *src, size_t n);
+void *ets_memset (void *dst, int c, size_t n);
+int ets_memcmp (const void *s1, const void *s2, size_t n);
+
+char *ets_strcpy (char *dst, const char *src);
+size_t ets_strlen (const char *s);
+int ets_strcmp (const char *s1, const char *s2);
+int ets_strncmp (const char *s1, const char *s2, size_t n);
+
+void ets_delay_us (uint32_t us);
+
+int ets_printf(const char *format, ...)  __attribute__ ((format (printf, 1, 2)));
+
+int ets_sprintf(char *str, const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
+
+void ets_str2macaddr (uint8_t *dst, const char *str);
+
+void ets_timer_disarm (ETSTimer *a);
+void ets_timer_setfn (ETSTimer *t, ETSTimerFunc *fn, void *parg);
+
+void Cache_Read_Enable(uint32_t b0, uint32_t b1, uint32_t use_40108000);
+void Cache_Read_Disable(void);
+
+void ets_intr_lock(void);
+void ets_intr_unlock(void);
+
 #endif
diff --git a/app/include/rtc/rtctime_internal.h b/app/include/rtc/rtctime_internal.h
index 0c9a3a5a..c8b2ce90 100644
--- a/app/include/rtc/rtctime_internal.h
+++ b/app/include/rtc/rtctime_internal.h
@@ -126,6 +126,7 @@
 #include <ets_sys.h>
 #include "rom.h"
 #include "rtcaccess.h"
+#include "user_interface.h"
 
 // Layout of the RTC storage space:
 //
diff --git a/app/libc/c_stdio.c b/app/libc/c_stdio.c
index a8e0956f..e52f2ffc 100644
--- a/app/libc/c_stdio.c
+++ b/app/libc/c_stdio.c
@@ -272,7 +272,6 @@ strtoupper(char *p)
 //#include <string.h>
 //#include <pmon.h>
 #include "c_string.h"
-typedef int int32_t;
 typedef unsigned int u_int32_t;
 typedef unsigned int u_int;
 typedef unsigned long u_long;
diff --git a/app/modules/Makefile b/app/modules/Makefile
index 48b26103..848c3834 100644
--- a/app/modules/Makefile
+++ b/app/modules/Makefile
@@ -15,6 +15,8 @@ ifndef PDIR
 GEN_LIBS = libmodules.a
 endif
 
+EXTRA_CCFLAGS+=-std=gnu11
+
 #############################################################
 # Configuration i.e. compile options etc.
 # Target specific stuff (defines etc.) goes in here!
diff --git a/app/modules/cjson.c b/app/modules/cjson.c
index b611c05f..ec769e04 100644
--- a/app/modules/cjson.c
+++ b/app/modules/cjson.c
@@ -43,6 +43,7 @@
 #include "c_limits.h"
 #include "lauxlib.h"
 #include "flash_api.h"
+#include "ctype.h"
 
 #include "strbuf.h"
 #include "cjson_mem.h"
diff --git a/app/modules/coap.c b/app/modules/coap.c
index 2b6efb9e..cac6268e 100644
--- a/app/modules/coap.c
+++ b/app/modules/coap.c
@@ -372,7 +372,7 @@ static int coap_request( lua_State* L, coap_method_t m )
   if(!pdu){
     if(uri)
       c_free(uri);
-    return;
+    return luaL_error (L, "alloc fail");
   }
 
   const char *payload = NULL;
diff --git a/app/modules/enduser_setup.c b/app/modules/enduser_setup.c
index 067c9535..84a84009 100644
--- a/app/modules/enduser_setup.c
+++ b/app/modules/enduser_setup.c
@@ -36,11 +36,11 @@
 #include "platform.h"
 #include "c_stdlib.h"
 #include "c_string.h"
+#include "ctype.h"
 #include "user_interface.h"
 #include "espconn.h"
 #include "flash_fs.h"
 
-
 #define MIN(x, y)  (((x) < (y)) ? (x) : (y))
 
 #define ENDUSER_SETUP_ERR_FATAL        (1 << 0)
@@ -96,7 +96,7 @@ static void enduser_setup_station_start(void);
 static void enduser_setup_station_start(void);
 static void enduser_setup_ap_start(void);
 static void enduser_setup_ap_stop(void);
-static void enduser_setup_check_station(void);
+static void enduser_setup_check_station(void *p);
 static void enduser_setup_debug(lua_State *L, const char *str);
 
 
@@ -177,8 +177,9 @@ static void enduser_setup_check_station_stop(void)
  *
  * Check that we've successfully entered station mode.
  */
-static void enduser_setup_check_station(void)
+static void enduser_setup_check_station(void *p)
 {
+  (void)p;
   struct ip_info ip;
   c_memset(&ip, 0, sizeof(struct ip_info));
 
@@ -391,7 +392,7 @@ static int enduser_setup_http_handle_credentials(char *data, unsigned short data
   err = wifi_station_disconnect();
   if (err == FALSE)
   {
-    ENDUSER_SETUP_ERROR_VOID("enduser_setup_station_start failed. wifi_station_disconnect failed.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
+    ENDUSER_SETUP_ERROR("enduser_setup_station_start failed. wifi_station_disconnect failed.", ENDUSER_SETUP_ERR_UNKOWN_ERROR, ENDUSER_SETUP_ERR_NONFATAL);
   }
   err = wifi_station_connect();
   if (err == FALSE)
diff --git a/app/modules/gpio.c b/app/modules/gpio.c
index d779a903..d4c189ed 100644
--- a/app/modules/gpio.c
+++ b/app/modules/gpio.c
@@ -3,6 +3,7 @@
 #include "module.h"
 #include "lauxlib.h"
 #include "platform.h"
+#include "rom.h"
 
 #include "c_types.h"
 #include "c_string.h"
diff --git a/app/modules/mqtt.c b/app/modules/mqtt.c
index 2dde4de6..78a41f18 100644
--- a/app/modules/mqtt.c
+++ b/app/modules/mqtt.c
@@ -15,6 +15,8 @@
 #include "mqtt_msg.h"
 #include "msg_queue.h"
 
+#include "user_interface.h"
+
 #define MQTT_BUF_SIZE 1024
 #define MQTT_DEFAULT_KEEPALIVE 60
 #define MQTT_MAX_CLIENT_LEN   64
@@ -831,7 +833,7 @@ static void socket_connect(struct espconn *pesp_conn)
 }
 
 static void socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg);
-static dns_reconn_count = 0;
+static int dns_reconn_count = 0;
 static ip_addr_t host_ip; // for dns
 static void socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
 {
diff --git a/app/modules/net.c b/app/modules/net.c
index f0eee3b6..516ccab9 100644
--- a/app/modules/net.c
+++ b/app/modules/net.c
@@ -610,7 +610,7 @@ static void socket_connect(struct espconn *pesp_conn)
 }
 
 static void socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg);
-static dns_reconn_count = 0;
+static int dns_reconn_count = 0;
 static void socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
 {
   NODE_DBG("socket_dns_found is called.\n");
diff --git a/app/modules/node.c b/app/modules/node.c
index 26b63760..bfdf0a37 100644
--- a/app/modules/node.c
+++ b/app/modules/node.c
@@ -25,6 +25,7 @@
 #include "flash_api.h"
 #include "flash_fs.h"
 #include "user_version.h"
+#include "rom.h"
 
 #define CPU80MHZ 80
 #define CPU160MHZ 160
@@ -49,7 +50,7 @@ static int node_deepsleep( lua_State* L )
     if ( option < 0 || option > 4)
       return luaL_error( L, "wrong arg range" );
     else
-      deep_sleep_set_option( option );
+      system_deep_sleep_set_option( option );
   }
   // Set deleep time, skip if nil
   if ( lua_isnumber(L, 1) )
diff --git a/app/modules/rc.c b/app/modules/rc.c
index d8301743..72c0dff4 100644
--- a/app/modules/rc.c
+++ b/app/modules/rc.c
@@ -1,6 +1,7 @@
 #include "module.h"
 #include "lauxlib.h"
 #include "platform.h"
+#include "rom.h"
 //#include "driver/easygpio.h"
 //static Ping_Data pingA;
 #define defPulseLen 185
diff --git a/app/modules/rtctime.c b/app/modules/rtctime.c
index 76ca4392..9d3d0a6e 100644
--- a/app/modules/rtctime.c
+++ b/app/modules/rtctime.c
@@ -87,7 +87,7 @@ static void do_sleep_opt (lua_State *L, int idx)
     uint32_t opt = lua_tonumber (L, idx);
     if (opt < 0 || opt > 4)
       luaL_error (L, "unknown sleep option");
-    deep_sleep_set_option (opt);
+    system_deep_sleep_set_option (opt);
   }
 }
 
diff --git a/app/modules/tmr.c b/app/modules/tmr.c
index 2a3dc724..c88af871 100755
--- a/app/modules/tmr.c
+++ b/app/modules/tmr.c
@@ -59,20 +59,6 @@ tmr.softwd(int)
 #define TIMER_MODE_AUTO 1
 #define TIMER_IDLE_FLAG (1<<7) 
 
-//well, the following are my assumptions
-//why, oh why is there no good documentation
-//chinese companies should learn from Atmel
-extern void ets_timer_arm_new(os_timer_t* t, uint32_t milliseconds, uint32_t repeat_flag, uint32_t isMstimer);
-extern void ets_timer_disarm(os_timer_t* t);
-extern void ets_timer_setfn(os_timer_t* t, os_timer_func_t *f, void *arg);
-extern void ets_delay_us(uint32_t us);
-extern uint32_t system_get_time();
-extern uint32_t platform_tmr_exists(uint32_t t);
-extern uint32_t system_rtc_clock_cali_proc();
-extern uint32_t system_get_rtc_time();
-extern void system_restart();
-extern void system_soft_wdt_feed();
-
 //in fact lua_State is constant, it's pointless to pass it around
 //but hey, whatever, I'll just pass it, still we waste 28B here
 typedef struct{
diff --git a/app/modules/uart.c b/app/modules/uart.c
index 406737db..857d7137 100755
--- a/app/modules/uart.c
+++ b/app/modules/uart.c
@@ -6,6 +6,7 @@
 
 #include "c_types.h"
 #include "c_string.h"
+#include "rom.h"
 
 static lua_State *gL = NULL;
 static int uart_receive_rf = LUA_NOREF;
diff --git a/app/modules/wifi.c b/app/modules/wifi.c
index af8c5bfd..e0c99857 100644
--- a/app/modules/wifi.c
+++ b/app/modules/wifi.c
@@ -6,6 +6,7 @@
 
 #include "c_string.h"
 #include "c_stdlib.h"
+#include "ctype.h"
 
 #include "c_types.h"
 #include "user_interface.h"
@@ -22,7 +23,7 @@ static bool FLAG_wifi_force_sleep_enabled=0;
 
 //variables for wifi event monitor
 static sint32_t wifi_status_cb_ref[6] = {LUA_NOREF,LUA_NOREF,LUA_NOREF,LUA_NOREF,LUA_NOREF,LUA_NOREF};
-static volatile os_timer_t wifi_sta_status_timer;
+static os_timer_t wifi_sta_status_timer;
 static uint8 prev_wifi_status=0;
 
 
diff --git a/app/modules/ws2801.c b/app/modules/ws2801.c
index 26b56211..e135c195 100644
--- a/app/modules/ws2801.c
+++ b/app/modules/ws2801.c
@@ -43,7 +43,7 @@ static void ws2801_strip(uint8_t const * data, uint16_t len) {
     GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, ws2801_bit_data);
 }
 
-static void enable_pin_mux(pin) {
+static void enable_pin_mux(int pin) {
     // The API only supports setting PERIPHS_IO_MUX on GPIO 0, 2, 4, 5
     switch (pin) {
     case 0:
diff --git a/app/platform/platform.c b/app/platform/platform.c
index 35f30318..5a3eed7d 100755
--- a/app/platform/platform.c
+++ b/app/platform/platform.c
@@ -131,7 +131,8 @@ int platform_gpio_read( unsigned pin )
 }
 
 #ifdef GPIO_INTERRUPT_ENABLE
-static void platform_gpio_intr_dispatcher( platform_gpio_intr_handler_fn_t cb){
+static void platform_gpio_intr_dispatcher( void *arg) {
+  platform_gpio_intr_handler_fn_t cb = arg;
   uint8 i, level;
   uint32 gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);
   for (i = 0; i < GPIO_PIN_NUM; i++) {
diff --git a/app/platform/platform.h b/app/platform/platform.h
index 24cb3317..0669ff9d 100644
--- a/app/platform/platform.h
+++ b/app/platform/platform.h
@@ -149,6 +149,7 @@ int platform_uart_recv( unsigned id, unsigned timer_id, timer_data_type timeout
 int platform_s_uart_recv( unsigned id, timer_data_type timeout );
 int platform_uart_set_flow_control( unsigned id, int type );
 int platform_s_uart_set_flow_control( unsigned id, int type );
+void platform_uart_alt( int set );
 
 // *****************************************************************************
 // PWM subsection
@@ -253,6 +254,13 @@ uint32_t platform_flash_mapped2phys (uint32_t mapped_addr);
 void* platform_get_first_free_ram( unsigned id );
 void* platform_get_last_free_ram( unsigned id );
 
+
+// *****************************************************************************
+// Other glue
+
+int platform_ow_exists( unsigned id );
+int platform_gpio_exists( unsigned id );
+
 // *****************************************************************************
 // Helper macros
 #define MOD_CHECK_ID( mod, id )\
diff --git a/app/smart/smart.c b/app/smart/smart.c
index c362191a..2b7a906c 100644
--- a/app/smart/smart.c
+++ b/app/smart/smart.c
@@ -499,7 +499,7 @@ void smart_end(){
       wifi_station_connect();
 
       os_timer_disarm(&smart_timer);
-      os_timer_setfn(&smart_timer, (os_timer_func_t *)station_check_connect, 1);
+      os_timer_setfn(&smart_timer, (os_timer_func_t *)station_check_connect, (void *)1);
       os_timer_arm(&smart_timer, STATION_CHECK_TIME, 0);   // no repeat
     }
   }
@@ -716,6 +716,6 @@ void station_check_connect(bool smart){
       break;
   }
   os_timer_disarm(&smart_timer);
-  os_timer_setfn(&smart_timer, (os_timer_func_t *)station_check_connect, smart);
+  os_timer_setfn(&smart_timer, (os_timer_func_t *)station_check_connect, (void *)(int)smart);
   os_timer_arm(&smart_timer, STATION_CHECK_TIME, 0);   // no repeat
 }
diff --git a/app/spiffs/spiffs.h b/app/spiffs/spiffs.h
index e1e76d81..eecb8139 100644
--- a/app/spiffs/spiffs.h
+++ b/app/spiffs/spiffs.h
@@ -571,6 +571,7 @@ void myspiffs_clearerr( int fd );
 int myspiffs_check( void );
 int myspiffs_rename( const char *old, const char *newname );
 size_t myspiffs_size( int fd );
+int myspiffs_format (void);
 
 s32_t SPIFFS_eof(spiffs *fs, spiffs_file fh);
 s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh);
diff --git a/sdk-overrides/include/mem.h b/sdk-overrides/include/mem.h
new file mode 100644
index 00000000..1a2f91ec
--- /dev/null
+++ b/sdk-overrides/include/mem.h
@@ -0,0 +1,11 @@
+#ifndef _SDK_OVERRIDE_MEM_H_
+#define _SDK_OVERRIDE_MEM_H_
+
+void *pvPortMalloc (size_t sz, const char *, unsigned);
+void vPortFree (void *p, const char *, unsigned);
+void *pvPortZalloc (size_t sz, const char *, unsigned);
+void *pvPortRealloc (void *p, size_t n, const char *, unsigned);
+
+#include_next "mem.h"
+
+#endif
diff --git a/sdk-overrides/include/osapi.h b/sdk-overrides/include/osapi.h
new file mode 100644
index 00000000..96b836cc
--- /dev/null
+++ b/sdk-overrides/include/osapi.h
@@ -0,0 +1,9 @@
+#ifndef _SDK_OVERRIDE_OSAPI_H_
+#define _SDK_OVERRIDE_OSAPI_H_
+
+#include "rom.h"
+void ets_timer_arm_new (ETSTimer *a, int b, int c, int isMstimer);
+
+#include_next "osapi.h"
+
+#endif