diff --git a/uart b/uart
index 9e25496..c903cfa 100755
Binary files a/uart and b/uart differ
diff --git a/uart.c b/uart.c
index 257d93e..39eb381 100644
--- a/uart.c
+++ b/uart.c
@@ -29,8 +29,8 @@ unsigned char BUF_TX[20];
 unsigned char *TX;
 
 TX = &BUF_TX[0];
-//*TX++ = 'R';
-*TX++ = 'P';
+*TX++ = 'R'; // -> decrease TTL
+//*TX++ = 'P'; // -> do NOT decrease TTL
 /*
 *TX++ = 'a';
 *TX++ = 's';