diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index bbecd40e..410a78d6 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2607,9 +2607,12 @@ void print_string(char *string)
 void start_payload() {
 
 #ifdef APRS_VHF	  
-   Serial2.setRX(9);
+// Serial2.setRX(9);	
+   Serial2.setRX(1);
    delay(100);
-   Serial2.setTX(8);
+// Serial2.setTX(8);
+   Serial2.setRX(0);
+  	
    delay(100);
    Serial2.begin(115200);