add：重新完善示例实现，编译通过

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/LuatOS.iml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/LuatOS.iml" filepath="$PROJECT_DIR$/.idea/LuatOS.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

bsp/emulator/include/luat_remotem.h

@@ -36,6 +36,7 @@ int luat_remotem_ready(void);
 int luat_remotem_up(cJSON* top);
 // from string ext
 void luat_str_tohex(char* str, size_t len, char* buff);
+void luat_str_tohexwithsep(char* str, size_t len, char* separator, size_t len_j, char* buff);
 
 
 void luat_remotem_typeopt_init(cJSON* top, cJSON* data);

lua/src/lstrlib_exts.c

@@ -13,14 +13,21 @@
 /* }====================================================== */
 
 static unsigned char hexchars[] = "0123456789ABCDEF";
-void luat_str_tohex(char* str, size_t len, char* buff) {
+void luat_str_tohexwithsep(char* str, size_t len, char* separator, size_t len_j, char* buff) {
   for (size_t i = 0; i < len; i++)
   {
     char ch = *(str+i);
-    buff[i*2] = hexchars[(unsigned char)ch >> 4];
-    buff[i*2+1] = hexchars[(unsigned char)ch & 0xF];
+    buff[i*(2+len_j)] = hexchars[(unsigned char)ch >> 4];
+    buff[i*(2+len_j)+1] = hexchars[(unsigned char)ch & 0xF];
+    for (size_t j = 0; j < len_j; j++){
+      buff[i*(2+len_j)+2+j] = separator[j];
+    }
   }
 }
+
+void luat_str_tohex(char* str, size_t len, char* buff) {
+  luat_str_tohexwithsep(str, len, NULL, 0, buff);
+}
 void luat_str_fromhex(char* str, size_t len, char* buff) {
   for (size_t i = 0; i < len/2; i++)
   {
@@ -35,25 +42,30 @@ void luat_str_fromhex(char* str, size_t len, char* buff) {
 }
 /*
 将字符串转成HEX
-@api string.toHex(str)
+@api string.toHex(str, separator)
 @string 需要转换的字符串
+@string 分隔符, 默认为""
 @return string HEX字符串
 @return number HEX字符串的长度
 @usage
 string.toHex("\1\2\3") --> "010203" 6
 string.toHex("123abc") --> "313233616263" 12
+string.toHex("123abc", " ") --> "31 32 33 61 62 63 " 12
 */
 int l_str_toHex (lua_State *L) {
   size_t len;
   const char *str = luaL_checklstring(L, 1, &len);
+  size_t len_j;
+  const char *separator = luaL_optlstring(L, 2, "", &len_j);
   luaL_Buffer buff;
-  luaL_buffinitsize(L, &buff, 2*len);
-  luat_str_tohex((char*)str, len, buff.b);
-  buff.n = len * 2;
+  luaL_buffinitsize(L, &buff, (2+len_j)*len);
+  luat_str_tohexwithsep((char*)str, len, (char*)separator, len_j, buff.b);
+  buff.n = len * (2 + len_j);
   luaL_pushresult(&buff);
   lua_pushinteger(L, len*2);
   return 2;
 }
+
 /*
 将HEX转成字符串
 @api string.fromHex(hex)

luat/include/luat_str.h

@@ -3,6 +3,7 @@
 #define LUAT_STR_H
 #include "string.h"
 
+void luat_str_tohexwithsep(char* str, size_t len, char* separator, size_t len_j, char* buff);
 void luat_str_tohex(char* str, size_t len, char* buff);
 void luat_str_fromhex(char* str, size_t len, char* buff);