diff --git a/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt b/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
index 090f604..3173907 100644
--- a/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
+++ b/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
@@ -17,6 +17,7 @@
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.IOException
+import java.io.OutputStream
 
 class SerialPortService : Service(), LifecycleOwner {
 
@@ -95,6 +96,13 @@
         }
     }
 
+    fun getOutputStream(): OutputStream {
+        //调高串口电位
+        gpioManager.setGpioHigh("18")
+        Log.d(kTag, "getOutputStream: 调高串口电位")
+        return serialPorts.first().outputStream
+    }
+
     fun closeSerialPort() {
         //降低串口电位
         gpioManager.setGpioLow("18")

diff --git a/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt b/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
index 090f604..3173907 100644
--- a/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
+++ b/app/src/main/java/com/casic/detector/common/service/SerialPortService.kt
@@ -17,6 +17,7 @@
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.IOException
+import java.io.OutputStream
 
 class SerialPortService : Service(), LifecycleOwner {
 
@@ -95,6 +96,13 @@
         }
     }
 
+    fun getOutputStream(): OutputStream {
+        //调高串口电位
+        gpioManager.setGpioHigh("18")
+        Log.d(kTag, "getOutputStream: 调高串口电位")
+        return serialPorts.first().outputStream
+    }
+
     fun closeSerialPort() {
         //降低串口电位
         gpioManager.setGpioLow("18")
diff --git a/app/src/main/java/com/casic/detector/common/view/MainActivity.kt b/app/src/main/java/com/casic/detector/common/view/MainActivity.kt
index 6e41430..ae24b9e 100644
--- a/app/src/main/java/com/casic/detector/common/view/MainActivity.kt
+++ b/app/src/main/java/com/casic/detector/common/view/MainActivity.kt
@@ -537,7 +537,6 @@
         searchMarkerTimer = Timer()
         serialPortService?.openSerialPort(object : OnSerialPortDataListener {
             override fun write(outStream: OutputStream) {
-                this@MainActivity.outStream = outStream
                 runOnUiThread {
                     searchMarkerTimer?.schedule(object : TimerTask() {
                         override fun run() {
@@ -939,6 +938,8 @@
             val result = String(data, StandardCharsets.UTF_8)
             if (result.contains("ICY 200 OK")) {
                 "高精度定位服务连接成功".show(this)
+                //连接服务即打开串口
+                this.outStream = serialPortService?.getOutputStream()
             }
         } else {
             "收到千寻数据返回，长度：${data.size}".show(this)