diff --git a/src/serialport.js b/src/serialport.js
index 2c966a1..718ce11 100644
--- a/src/serialport.js
+++ b/src/serialport.js
@@ -159,9 +159,10 @@ document.getElementById("port-switch").onclick = (e) => {
       if (config.general.modemSignal === true) {
         modemSignalTimer = setInterval(modemSignalTimerHandle, 100);
       }
-      port.set({ rts: true, dtr: true }, (e) => {
-        if (e !== null) console.error(e);
-      });
+      // Set below signal will cause some device reboot.
+      // port.set({ rts: true, dtr: true }, (e) => {
+      //   if (e !== null) console.error(e);
+      // });git
     });
 
     port.on("error", (e) => {