diff --git a/src/mesh/NodeDB.cpp b/src/mesh/NodeDB.cpp
index 6d13952e5..d35e0a38a 100644
--- a/src/mesh/NodeDB.cpp
+++ b/src/mesh/NodeDB.cpp
@@ -80,6 +80,14 @@ static unsigned char userprefs_admin_key_1[] = USERPREFS_USE_ADMIN_KEY_1;
 static unsigned char userprefs_admin_key_2[] = USERPREFS_USE_ADMIN_KEY_2;
 #endif
 
+// Weak empty variant initialization function.
+// May be redefined by variant files.
+void variantDefaultConfig() __attribute__((weak));
+void variantDefaultConfig() {}
+
+void variantDefaultModuleConfig() __attribute__((weak));
+void variantDefaultModuleConfig() {}
+
 #ifdef HELTEC_MESH_NODE_T114
 
 uint32_t read8(uint8_t bits, uint8_t dummy, uint8_t cs, uint8_t sck, uint8_t mosi, uint8_t dc, uint8_t rst)
@@ -785,6 +793,8 @@ void NodeDB::installDefaultConfig(bool preserveKey = false)
 #endif
 
     initConfigIntervals();
+    variantDefaultConfig();
+    variantDefaultModuleConfig();
 }
 
 void NodeDB::initConfigIntervals()
diff --git a/variants/esp32s3/ELECROW-ThinkNode-G3/platformio.ini b/variants/esp32s3/ELECROW-ThinkNode-G3/platformio.ini
index e2c83efe5..4f94f5d39 100644
--- a/variants/esp32s3/ELECROW-ThinkNode-G3/platformio.ini
+++ b/variants/esp32s3/ELECROW-ThinkNode-G3/platformio.ini
@@ -12,7 +12,11 @@ build_flags =
   -mfix-esp32-psram-cache-issue
 
 lib_ignore =
-    Ethernet
+  Ethernet
+
+build_src_filter =
+  ${esp32s3_base.build_src_filter}
+  +<../variants/esp32s3/ELECROW-ThinkNode-G3/*>
 
 lib_deps =
   ${esp32s3_base.lib_deps}
diff --git a/variants/esp32s3/ELECROW-ThinkNode-G3/variant.cpp b/variants/esp32s3/ELECROW-ThinkNode-G3/variant.cpp
new file mode 100644
index 000000000..c6ff6b8d8
--- /dev/null
+++ b/variants/esp32s3/ELECROW-ThinkNode-G3/variant.cpp
@@ -0,0 +1,6 @@
+#include "mesh/NodeDB.h"
+
+void variantDefaultConfig()
+{
+    config.network.eth_enabled = true;
+}
diff --git a/variants/esp32s3/ELECROW-ThinkNode-M7/platformio.ini b/variants/esp32s3/ELECROW-ThinkNode-M7/platformio.ini
index f2ddbf8d2..68fe68182 100644
--- a/variants/esp32s3/ELECROW-ThinkNode-M7/platformio.ini
+++ b/variants/esp32s3/ELECROW-ThinkNode-M7/platformio.ini
@@ -11,7 +11,11 @@ build_flags =
   -mfix-esp32-psram-cache-issue
 
 lib_ignore = 
-    Ethernet
+  Ethernet
+
+build_src_filter =
+  ${esp32s3_base.build_src_filter}
+  +<../variants/esp32s3/ELECROW-ThinkNode-M7/*>
 
 lib_deps =
   ${esp32s3_base.lib_deps}
diff --git a/variants/esp32s3/ELECROW-ThinkNode-M7/variant.cpp b/variants/esp32s3/ELECROW-ThinkNode-M7/variant.cpp
new file mode 100644
index 000000000..c6ff6b8d8
--- /dev/null
+++ b/variants/esp32s3/ELECROW-ThinkNode-M7/variant.cpp
@@ -0,0 +1,6 @@
+#include "mesh/NodeDB.h"
+
+void variantDefaultConfig()
+{
+    config.network.eth_enabled = true;
+}