diff --git a/simulator/rdtemp/cli.ino b/simulator/rdtemp/cli.ino
index 7ee04f0..0925139 100644
--- a/simulator/rdtemp/cli.ino
+++ b/simulator/rdtemp/cli.ino
@@ -70,7 +70,11 @@ prtln("");
 static void clihelp()
 {
  prtln("x\texit cli");
- prtln("I\tinit storage"); 
+ prtln("I\tinit storage");
+ prtln("d\tdisplay config");
+ prtln("r\tread config");
+ prtln("w\twrite config");
+ prtln("H\thexdump config");
 }
 /* --------------------------------------------------------------- */
 void phytocli(void)
@@ -87,15 +91,22 @@ prtln("entering cli, '?' to help, 'x' to quit.");
 do  {
   prt(" + ");
   ret = readline(line,TLINE);
-#if DEBUG
+#if DEBUG > 1
   hexdump((unsigned char *)line, ret);
 #endif
   key = *(sptr = strtok(line, " "));
 
   switch(key) {
-    case 'x':  flag_exit=1;                     break;
-    case '?':  clihelp();                       break;
-    case 'I':  init_storage();                  break;
+    case 'x':  flag_exit=1;                            break;
+    case '?':  clihelp();                              break;
+    case 'I':  init_storage();                         break;
+    case 'd':  display_config(&parametres);            break;
+    case 'r':  read_config(0, &parametres);            break;
+    case 'w':  write_config(0, &parametres);           break;
+    case 'H':  hexdump((unsigned char *)&parametres,
+                            sizeof(Global));           break;
+
+    default:    prtln("gni ?");                        break;
     }
   
   } while (!flag_exit);
diff --git a/simulator/rdtemp/rdtemp.ino b/simulator/rdtemp/rdtemp.ino
index 6016949..d9196c9 100644
--- a/simulator/rdtemp/rdtemp.ino
+++ b/simulator/rdtemp/rdtemp.ino
@@ -7,6 +7,14 @@
 #define NBVAL   4
 #define DELAI   1000
 
+typedef struct {
+  unsigned short    magic;
+  char              tag[4];
+  short             delai;
+  } Global;
+
+Global parametres;
+
 /* -------------------------------------------------- */
 void setup() {
   Serial.begin(9600);
diff --git a/simulator/rdtemp/storage.ino b/simulator/rdtemp/storage.ino
index 4a4e604..c964f49 100644
--- a/simulator/rdtemp/storage.ino
+++ b/simulator/rdtemp/storage.ino
@@ -1,14 +1,59 @@
 /* --------------------------------------------------------------- */
 #include <EEPROM.h>
 /* --------------------------------------------------------------- */
-int init_storage(void)
+short init_storage(void)
 {
+short     foo;
+
 Serial.println(__func__);
 
 Serial.print("eeprom length: ");
 Serial.println(EEPROM.length());
-
+Serial.print("global length: ");
+Serial.println(sizeof(Global));
 
 }
 /* --------------------------------------------------------------- */
+short read_config(short num, Global *where)
+{
+#if DEBUG
+prtln(">>> read config");
+#endif
+
+
+
+
+return -1;
+}
+/* --------------------------------------------------------------- */
+short write_config(short num, Global *from)
+{
+#if DEBUG
+prtln(">>> write config");
+#endif
+
+from->magic = 0xfde9;
+memcpy(from->tag, "aaaa", 4);
+
+return -1;
+}
+/* --------------------------------------------------------------- */
+short display_config(Global *what)
+{
+char    foo, c;
+#if DEBUG
+prtln(">>> display config");
+#endif
+
+prt("Magic     : ");    prtln(what->magic);
+prt("Id        : ");
+for (foo=0; foo<4; foo++) {
+  if (isprint(c=what->tag[foo]))  prt(c);
+  else                            prt('?');
+  }
+prtln("");
+prt("Delay     : ");    prtln(what->delai);
+
+return -1;
+}
 /* --------------------------------------------------------------- */