diff --git a/V1/switch.c b/V1/switch.c
index b00692a..ed448c8 100644
--- a/V1/switch.c
+++ b/V1/switch.c
@@ -7,6 +7,13 @@
  * 
  * */
 
+#define PIN01 1
+#define PIN12 12
+#define PIN11 11
+#define PIN06 6
+#define IN ((const unsigned char *)"in\n")
+#define OUT ((const unsigned char *)"out\n")
+
 #include <stdio.h>
 #include <unistd.h>
 
@@ -31,6 +38,10 @@ int reserve(char gpioPort)
 	return EXIT_SUCCESS;	
 }
 
+int inOut(char gpioPort, char * inOut)
+{
+
+}
 
 int main()
 {