diff --git a/src/serial_port.cpp b/src/serial_port.cpp
index 4f9a2fb..f8c1507 100644
--- a/src/serial_port.cpp
+++ b/src/serial_port.cpp
@@ -154,12 +154,11 @@ void SerialPort::reconnect_loop()
     {
         if (open_port())
         {
-            // 等待读线程结束
-            if (reader_thread_.joinable()) reader_thread_.join();
+            // 不 join reader，只等 stop_flag_
+            while (running_ && !stop_flag_) std::this_thread::sleep_for(std::chrono::milliseconds(200));
 
             close_port();
             LOG_WARN("[" + id_ + "] Port closed, will retry");
-
             current_interval = retry_interval_;
         }
         else
@@ -185,8 +184,8 @@ bool SerialPort::configure_port(int fd)
     tty.c_iflag &= ~IGNBRK;
     tty.c_lflag = 0;
     tty.c_oflag = 0;
-    tty.c_cc[VMIN] = 1;
-    tty.c_cc[VTIME] = 1;
+    tty.c_cc[VMIN] = 0;
+    tty.c_cc[VTIME] = 10;
 
     tty.c_iflag &= ~(IXON | IXOFF | IXANY);
     tty.c_cflag |= (CLOCAL | CREAD);