diff --git a/README.md b/README.md
index d4f88930..3e8b5998 100644
--- a/README.md
+++ b/README.md
@@ -24,8 +24,8 @@ Tencent QQ group: 309957875<br />
 - fix wifi smart connect
 - add spi module (done)
 - add mqtt module (done)
-- add coap module
-- cross compiler
+- add coap module (in coap branch)
+- cross compiler (done)
 
 # Change log
 2015-02-13<br />
diff --git a/app/include/user_config.h b/app/include/user_config.h
index c6ec1e0e..74d1ff6e 100644
--- a/app/include/user_config.h
+++ b/app/include/user_config.h
@@ -7,7 +7,7 @@
 #define NODE_VERSION_INTERNAL   0U
 
 #define NODE_VERSION	"NodeMCU 0.9.5"
-#define BUILD_DATE	    "build 20150213"
+#define BUILD_DATE	    "build 20150214"
 
 // #define DEVKIT_VERSION_0_9 1 	// define this only if you use NodeMCU devkit v0.9
 
diff --git a/app/lua/lauxlib.c b/app/lua/lauxlib.c
index fedd7c56..00e740be 100644
--- a/app/lua/lauxlib.c
+++ b/app/lua/lauxlib.c
@@ -692,6 +692,8 @@ LUALIB_API int luaL_loadfsfile (lua_State *L, const char *filename) {
     lf.f = fs_open(filename, FS_RDONLY);
     if (lf.f < FS_OPEN_OK) return errfsfile(L, "open", fnameindex);
   }
+  // if(fs_size(lf.f)>LUAL_BUFFERSIZE)
+  //   return luaL_error(L, "file is too big");
   c = fs_getc(lf.f);
   if (c == '#') {  /* Unix exec. file? */
     lf.extraline = 1;
diff --git a/app/lua/luaconf.h b/app/lua/luaconf.h
index 3a57e1e7..1a1760c7 100644
--- a/app/lua/luaconf.h
+++ b/app/lua/luaconf.h
@@ -542,7 +542,7 @@ extern int readline4lua(const char *prompt, char *buffer, int length);
 /*
 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 */
-#define LUAL_BUFFERSIZE		(BUFSIZ*4)
+#define LUAL_BUFFERSIZE		((BUFSIZ)*4)
 
 /* }================================================================== */
 
diff --git a/app/modules/net.c b/app/modules/net.c
index 51639b54..5b9dba9d 100644
--- a/app/modules/net.c
+++ b/app/modules/net.c
@@ -1241,6 +1241,31 @@ static int net_socket_unhold( lua_State* L )
   return 0;
 }
 
+// Lua: ip,port = sk:getpeer()
+static int net_socket_getpeer( lua_State* L )
+{
+  lnet_userdata *nud;
+  const char *mt = "net.socket";
+  nud = (lnet_userdata *)luaL_checkudata(L, 1, mt);
+  luaL_argcheck(L, nud, 1, "Server/Socket expected");
+
+  if(nud!=NULL && nud->pesp_conn!=NULL ){
+      char temp[20] = {0};
+      c_sprintf(temp, IPSTR, IP2STR( &(nud->pesp_conn->proto.tcp->remote_ip) ) );
+      if ( nud->pesp_conn->proto.tcp->remote_port != 0 ) {
+        lua_pushstring( L, temp );
+        lua_pushinteger( L, nud->pesp_conn->proto.tcp->remote_port );
+      } else {
+        lua_pushnil( L );
+        lua_pushnil( L );
+      }
+  } else {
+      lua_pushnil( L );
+      lua_pushnil( L );
+  }
+  return 2;
+}
+
 // Lua: socket:dns( string, function(ip) )
 static int net_socket_dns( lua_State* L )
 {
@@ -1302,6 +1327,7 @@ static const LUA_REG_TYPE net_socket_map[] =
   { LSTRKEY( "hold" ), LFUNCVAL ( net_socket_hold ) },
   { LSTRKEY( "unhold" ), LFUNCVAL ( net_socket_unhold ) },
   { LSTRKEY( "dns" ), LFUNCVAL ( net_socket_dns ) },
+  { LSTRKEY( "getpeer" ), LFUNCVAL ( net_socket_getpeer ) },
   // { LSTRKEY( "delete" ), LFUNCVAL ( net_socket_delete ) },
   { LSTRKEY( "__gc" ), LFUNCVAL ( net_socket_delete ) },
 #if LUA_OPTIMIZE_MEMORY > 0
diff --git a/app/platform/flash_fs.h b/app/platform/flash_fs.h
index 3f7d4710..9d9da7c7 100644
--- a/app/platform/flash_fs.h
+++ b/app/platform/flash_fs.h
@@ -69,6 +69,7 @@
 #define fs_format myspiffs_format
 #define fs_check myspiffs_check
 #define fs_rename myspiffs_rename
+#define fs_size myspiffs_size
 
 #define FS_NAME_MAX_LENGTH SPIFFS_OBJ_NAME_LEN
 
diff --git a/app/spiffs/spiffs.c b/app/spiffs/spiffs.c
index 5434e68d..df749e09 100644
--- a/app/spiffs/spiffs.c
+++ b/app/spiffs/spiffs.c
@@ -165,6 +165,9 @@ void myspiffs_clearerr( int fd ){
 int myspiffs_rename( const char *old, const char *newname ){
   return SPIFFS_rename(&fs, (char *)old, (char *)newname);
 }
+size_t myspiffs_size( int fd ){
+  return SPIFFS_size(&fs, (spiffs_file)fd);
+}
 #if 0
 void test_spiffs() {
   char buf[12];
diff --git a/app/spiffs/spiffs.h b/app/spiffs/spiffs.h
index ca5200fd..23228446 100644
--- a/app/spiffs/spiffs.h
+++ b/app/spiffs/spiffs.h
@@ -423,6 +423,7 @@ s32_t SPIFFS_check(spiffs *fs);
  */
 s32_t SPIFFS_eof(spiffs *fs, spiffs_file fh);
 s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh);
+s32_t SPIFFS_size(spiffs *fs, spiffs_file fh);
 
 #if SPIFFS_TEST_VISUALISATION
 /**
@@ -465,5 +466,6 @@ int myspiffs_error( int fd );
 void myspiffs_clearerr( int fd );
 int myspiffs_check( void );
 int myspiffs_rename( const char *old, const char *newname );
+size_t myspiffs_size( int fd );
 
 #endif /* SPIFFS_H_ */
diff --git a/app/spiffs/spiffs_hydrogen.c b/app/spiffs/spiffs_hydrogen.c
index 50777b73..20e45ecf 100644
--- a/app/spiffs/spiffs_hydrogen.c
+++ b/app/spiffs/spiffs_hydrogen.c
@@ -798,6 +798,25 @@ s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh) {
   return res;
 }
 
+s32_t SPIFFS_size(spiffs *fs, spiffs_file fh) {
+  SPIFFS_API_CHECK_MOUNT(fs);
+  SPIFFS_LOCK(fs);
+
+  spiffs_fd *fd;
+  s32_t res;
+  res = spiffs_fd_get(fs, fh, &fd);
+  SPIFFS_API_CHECK_RES(fs, res);
+
+#if SPIFFS_CACHE_WR
+  spiffs_fflush_cache(fs, fh);
+#endif
+
+  res = fd->size;
+
+  SPIFFS_UNLOCK(fs);
+  return res;
+}
+
 #if SPIFFS_TEST_VISUALISATION
 s32_t SPIFFS_vis(spiffs *fs) {
   s32_t res = SPIFFS_OK;
diff --git a/pre_build/0.9.5/nodemcu_20150213.bin b/pre_build/0.9.5/nodemcu_20150213.bin
new file mode 100644
index 00000000..cb4fa0b1
Binary files /dev/null and b/pre_build/0.9.5/nodemcu_20150213.bin differ
diff --git a/pre_build/latest/nodemcu_latest.bin b/pre_build/latest/nodemcu_latest.bin
index cb4fa0b1..acc14e99 100644
Binary files a/pre_build/latest/nodemcu_latest.bin and b/pre_build/latest/nodemcu_latest.bin differ