diff --git a/app/src/main/java/com/ichtj/basetools/OptionAty.java b/app/src/main/java/com/ichtj/basetools/OptionAty.java
index 7988432..de38b38 100644
--- a/app/src/main/java/com/ichtj/basetools/OptionAty.java
+++ b/app/src/main/java/com/ichtj/basetools/OptionAty.java
@@ -5,6 +5,7 @@
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
+import android.util.Log;
 import android.view.View;
 
 import androidx.annotation.NonNull;
diff --git a/base_iotutils/src/main/java/com/face_chtj/base_iotutils/NetUtils.java b/base_iotutils/src/main/java/com/face_chtj/base_iotutils/NetUtils.java
index 6e3b03c..2f487f8 100644
--- a/base_iotutils/src/main/java/com/face_chtj/base_iotutils/NetUtils.java
+++ b/base_iotutils/src/main/java/com/face_chtj/base_iotutils/NetUtils.java
@@ -885,9 +885,23 @@ public static String getEthIPv4Address() {
                 }
             }
         } else {
-            // For versions before Android M, there is no direct API to get Ethernet information.
-            // You may need to use reflection or other methods to check Ethernet connectivity.
-            //Log.w(TAG, "Android version is too low to directly get Ethernet information.");
+            try{
+                Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
+                while (networkInterfaces.hasMoreElements()) {
+                    NetworkInterface networkInterface = networkInterfaces.nextElement();
+                    if (networkInterface.getName().equals("eth0") || networkInterface.getName().equals("wlan0")) { // 可能是eth0或wlan0
+                        Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
+                        while (inetAddresses.hasMoreElements()) {
+                            InetAddress inetAddress = inetAddresses.nextElement();
+                            if (!inetAddress.isLoopbackAddress() && inetAddress.getAddress().length == 4) {
+                                return inetAddress.getHostAddress();
+                            }
+                        }
+                    }
+                }
+            }catch(Throwable throwable){
+                throwable.printStackTrace();
+            }
         }
         return null;
     }
diff --git a/config.gradle b/config.gradle
index db8a610..fe01c9e 100644
--- a/config.gradle
+++ b/config.gradle
@@ -1,6 +1,6 @@
 ext {
     //选择对应签名 "cainiao" "rockchip" "imx8" "freescale"
-    BUILD_SIGN="rockchip"
+    BUILD_SIGN="freescale"
     BUILD_SIGN_PWD="android"
     BUILD_SIGN_PATH="../other/facefuture.jks"
     //android开发版本配置