diff --git a/src/lib.rs b/src/lib.rs
index 12d0108..a50b7a4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -26,12 +26,10 @@ pub async fn run_sdlan(
     // start_stop_sender: Sender<String>,
     // start_stop_receiver: Receiver<String>,
 ) -> Result<()> {
-    debug!("run_sdlan");
     let (start_stop_sender, start_stop_chan) = channel(20);
     let edge_uuid = create_or_load_uuid("")?;
     let node_conf = parse_config(edge_uuid, &args).await?;
 
-    debug!("initing edge");
     if let Err(e) = init_edge(&args.token, node_conf, args.tos, start_stop_sender).await {
         panic!("failed to init edge: {:?}", e);
     }
diff --git a/src/network/async_main.rs b/src/network/async_main.rs
index 99c500d..090b94e 100644
--- a/src/network/async_main.rs
+++ b/src/network/async_main.rs
@@ -139,7 +139,7 @@ async fn handle_tcp_event(edge: &Node, eventtype: EventType, eventprotobuf: &[u8
 pub async fn async_main(
     install_channel: String,
     args: CommandLine,
-    start_stop_chan: Receiver<String>,
+    start_stop_chan: Receiver<bool>,
     cancel: CancellationToken,
 ) -> Result<()> {
     // let _ = PidRecorder::new(".pid");
@@ -177,9 +177,9 @@ pub async fn async_main(
     init_tcp_conn(
         &args.tcp,
         move |stream| {
-            let token = args.token.clone();
             let installed_channel = install_channel.to_owned();
             Box::pin(async {
+                let token = edge._token.lock().unwrap().clone();
                 // let edge = get_edge();
                 // let edge = get_edge();
                 // let token = args.token.clone();
diff --git a/src/network/node.rs b/src/network/node.rs
index 951ad59..b68b4fb 100644
--- a/src/network/node.rs
+++ b/src/network/node.rs
@@ -2,7 +2,7 @@ use dashmap::DashMap;
 use rsa::RsaPrivateKey;
 use sdlan_sn_rs::config::{AF_INET, AF_INET6};
 use std::sync::atomic::{AtomicBool, AtomicU32, AtomicU64, AtomicU8, Ordering};
-use std::sync::{Arc, RwLock};
+use std::sync::{Arc, Mutex, RwLock};
 use tokio::io::AsyncReadExt;
 use tokio::sync::mpsc::Sender;
 
@@ -27,13 +27,8 @@ pub async fn init_edge(
     token: &str,
     node_conf: NodeConfig,
     tos: u32,
-    start_stop: Sender<String>,
+    start_stop: Sender<bool>,
 ) -> Result<()> {
-    if token.len() == 0 {
-        println!("failed to load token");
-        return Err(SDLanError::NormalError("no token is specified"));
-    }
-
     let _ = PidRecorder::new(".pid");
 
     // gen public key
@@ -93,10 +88,10 @@ pub struct Node {
 
     pub tcp_pong: Arc<AtomicU64>,
 
-    start_stop_sender: Sender<String>,
+    start_stop_sender: Sender<bool>,
 
     // user token info
-    pub _token: String,
+    pub _token: Mutex<String>,
 
     pub device_config: DeviceConfig,
     pub device: Iface,
@@ -135,11 +130,13 @@ unsafe impl Sync for Node {}
 
 impl Node {
     pub async fn start(&self, token: String) {
-        self.start_stop_sender.send(token).await;
+        *self._token.lock().unwrap() = token;
+        self.start_stop_sender.send(true).await;
     }
 
     pub async fn stop(&self) {
-        self.start_stop_sender.send("".to_owned()).await;
+        *self._token.lock().unwrap() = "".to_owned();
+        self.start_stop_sender.send(false).await;
     }
 
     pub fn new(
@@ -150,12 +147,12 @@ impl Node {
         token: &str,
         private: RsaPrivateKey,
         tcp_pong: Arc<AtomicU64>,
-        start_stop: Sender<String>,
+        start_stop: Sender<bool>,
     ) -> Self {
         Self {
             packet_id: AtomicU32::new(1),
             network_id: AtomicU32::new(0),
-            _token: token.to_owned(),
+            _token: Mutex::new(token.to_owned()),
 
             start_stop_sender: start_stop,
 
diff --git a/src/tcp/tcp_conn.rs b/src/tcp/tcp_conn.rs
index 12790d5..a644aeb 100644
--- a/src/tcp/tcp_conn.rs
+++ b/src/tcp/tcp_conn.rs
@@ -57,7 +57,7 @@ impl ReadWriteActor {
         keep_reconnect: bool,
         mut to_tcp: Receiver<Vec<u8>>,
         on_connected: T,
-        mut start_stop_chan: Receiver<String>,
+        mut start_stop_chan: Receiver<bool>,
         // cancel: CancellationToken,
     ) where
         T: for<'b> Fn(&'b mut TcpStream) -> BoxFuture<'b, ()>,
@@ -69,12 +69,12 @@ impl ReadWriteActor {
             if !started {
                 println!("waiting for start");
                 while let Some(m) = start_stop_chan.recv().await {
-                    if m.len() != 0 {
-                        println!("new token received");
+                    if m {
+                        println!("start received");
                         started = true;
                         break;
                     } else {
-                        println!("empty token received");
+                        println!("stop received");
                     }
                 }
             }
@@ -146,19 +146,12 @@ impl ReadWriteActor {
             };
 
             pin_mut!(read_from_tcp, write_to_tcp);
-            let received_empty_token_for_stop = async {
-                while let Some(tk) = start_stop_chan.recv().await {
-                    if tk.len() == 0 {
-                        return;
-                    }
-                }
-            };
 
             tokio::select! {
                 _ = read_from_tcp => {},
                 _ = write_to_tcp => {},
                 _ = check_pong => {},
-                _ = received_empty_token_for_stop => {
+                Some(false) = start_stop_chan.recv() => {
                     started = false;
                 }
             }
@@ -197,7 +190,7 @@ impl ReadWriterHandle {
         on_connected: T,
         on_message: T2,
         pong_time: Arc<AtomicU64>,
-        start_stop_chan: Receiver<String>,
+        start_stop_chan: Receiver<bool>,
         // cancel: CancellationToken,
     ) -> Self
     where
@@ -236,7 +229,7 @@ pub fn init_tcp_conn<'a, T, T2, F>(
     on_message: T2,
     pong_time: Arc<AtomicU64>,
     // cancel: CancellationToken,
-    start_stop_chan: Receiver<String>,
+    start_stop_chan: Receiver<bool>,
 ) where
     T: for<'b> Fn(&'b mut TcpStream) -> BoxFuture<'b, ()> + Send + 'static,
     T2: Fn(SdlanTcp) -> F + Send + 'static,