diff --git a/CMD/CMD.h b/CMD/CMD.h
new file mode 100644
index 0000000..0613dd7
--- /dev/null
+++ b/CMD/CMD.h
@@ -0,0 +1,13 @@
+#ifndef CMD_h
+#define CMD_h
+
+typedef CMD_lineOutFn(char* line) CMD_lineoutFn_t;
+
+// initilize and register the lineout print function
+bool init(CMD_lineoutFn_t* lineOut);
+
+// to recive a single caracter
+bool CMD_charIn(char c);
+
+
+#endif
\ No newline at end of file