Added sync mode

And made non-sync mode default (this should solve Win system issues with ACK receiving)

on-host/src/cli.rs

@@ -21,6 +21,11 @@ pub struct Cli {
     /// baud rate
     #[clap(short, long, default_value = "115200")]
     pub baud_rate: u32,
+
+    /// SYNC-MODE: for each packet sent wait for a signal from the device before
+    /// sending the next one
+    #[clap(short, long)]
+    pub sync: bool,
 }
 
 pub fn get_styles() -> Styles {

on-host/src/main.rs

@@ -81,9 +81,21 @@ fn main() {
             packets.total_packets()
         );
 
+        // if sync mode is enabled then wait for ACK
+        if args.sync {
+            wait_for_ack(&mut port, &mut buffer);
+        }
+    }
+
+    info!("sent {} packets", packets.sent_packets());
+    print_stats(times);
+}
+
+/// Wait for ACK signal from the device
+fn wait_for_ack(port: &mut Box<dyn SerialPort>, buffer: &mut [u8]) {
     // wait ACK
     loop {
-            match port.read(&mut buffer) {
+        match port.read(buffer) {
             Ok(t) => {
                 // eprint!("{}", String::from_utf8_lossy(&buffer[..t]));
                 // if didn't get the signal then print the buffer and exit with error
@@ -104,10 +116,6 @@ fn main() {
     // eprintln!();
 }
 
-    info!("sent {} packets", packets.sent_packets());
-    print_stats(times);
-}
-
 trait MavLinkPort {
     fn write_packet(&mut self, packet: MavMessage);
 }