made sure no uneccessary serial sends

src/main.rs

@@ -110,6 +110,7 @@ fn main() {
                 let mut message: [u8; message_length] = [0; message_length];
                 let mut received_bytes = 0;
                 let mut recording = false;
+                let mut sucessful_receive = false;
 
                 loop {
                     // get controller input (We expect to set soloMode here.)
@@ -139,6 +140,7 @@ fn main() {
                                     // reset everything for next message.
                                     recording = false;
                                     received_bytes = 0;
+                                    sucessful_receive = true;
                                     break;
                                 }
                                 else if recording {
@@ -164,10 +166,13 @@ fn main() {
                     // PID controller
 
                     // send voltage to motors.
+                    if sucessful_receive {
+                        sucessful_receive = false;
                         match port.write(&message[0..message_length]) {
                             Ok(n) => {println!("Controller: sent {} bytes to arduino!", n);},
                             Err(e) => {println!("Controller: could not write to arduino: {}", e); },
                         }
+                    }
 
                 }