added logging to server

server/Cargo.toml

@@ -9,3 +9,5 @@ tokio-stream = "0.1"
 tonic = { version = "0.11", features = ["transport"] }
 anyhow = "1.0"
 navka-common = { path = "../common" }
+tracing           = { version = "0.1", features = ["std"] }
+tracing-subscriber = "0.3"

server/src/main.rs

@@ -5,6 +5,8 @@ use std::{pin::Pin, sync::Arc};
 use tokio::{fs::OpenOptions, io::AsyncWriteExt};
 use tokio_stream::{wrappers::ReceiverStream, Stream, StreamExt};
 use tonic::{transport::Server, Request, Response, Status};
+use tracing::{info, error};
+use tracing_subscriber::FmtSubscriber;
 
 use navka_common::navka::{
     relay_server::{Relay, RelayServer},
@@ -38,7 +40,10 @@ impl Relay for Handler {
                 file.write_all(&msg.data).await.map_err(|e| Status::internal(e.to_string()))?;
                 file.flush().await.ok();
 
-                // 2) echo back
+                //  2) structured log (shows hex + length)
+                info!(bytes = ?msg.data, len = msg.data.len(), "HID report received");
+
+                // 3) echo back
                 tx.send(Ok(msg)).await.ok();
             }
             Ok::<_, Status>(())
@@ -50,12 +55,14 @@ impl Relay for Handler {
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
+    let subscriber = FmtSubscriber::builder().with_target(false).finish();
+    tracing::subscriber::set_global_default(subscriber)?;
+
     let file = OpenOptions::new()
         .write(true)
         .open("/dev/hidg0")
         .await?;
     let hid = Arc::new(tokio::sync::Mutex::new(file));
-
     let handler = Handler { hid };
 
     println!("🌐 navka-server listening on 0.0.0.0:50051");