diff --git a/uc/main.h b/uc/main.h
index 7babde0..b692fb8 100644
--- a/uc/main.h
+++ b/uc/main.h
@@ -19,7 +19,7 @@
 // $Id$
 //
 
-#define SENSOR0 "197676b88851e28c489524b4526a3745"
+#define SENSOR0 "0123456789abcdef0123456789abcdef"
 #define SENSOR1 "0123456789abcdef0123456789abcdef"
 #define SENSOR2 "0123456789abcdef0123456789abcdef"
 #define SENSOR3 "0123456789abcdef0123456789abcdef"