   //
   // Print preamble
   //
-
+  pinMode(A1,OUTPUT);
+  digitalWrite(A1, LOW); // Vcc for MPU6050
+  pinMode(5,OUTPUT);
+  digitalWrite(5, HIGH); // Vcc for MPU6050
+  pinMode(7,OUTPUT);
+  digitalWrite(7, HIGH); // Vcc for MPU6050
+    
   Serial.begin(115200);
   printf_begin();
   printf("\n\r  \n\r");

  if (role == sender)
  {
    // The payload will always be the same, what will change is how much of it we send.
    static char send_payload[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ789012"; //32 byte max
    radio.stopListening(); // stop listening so we can talk.
    printf("Now sending length %i...",next_payload_size);
    radio.write( send_payload, next_payload_size ); // This will block until complete


// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
// Leave open to be the 'ping' transmitter
const int role_pin = 0;

//
// Topology
