diff --git a/src/core/shell.cpp b/src/core/shell.cpp
index 80ee917..d4ad7f2 100644
--- a/src/core/shell.cpp
+++ b/src/core/shell.cpp
@@ -154,6 +154,7 @@ void Shell::back() {
 
 void Shell::loop() {
   M5Cardputer.update();
+  checkUsbAutoTrigger();
 
   if (M5Cardputer.Keyboard.isChange() && M5Cardputer.Keyboard.isPressed()) {
     auto st = M5Cardputer.Keyboard.keysState();
@@ -181,3 +182,25 @@ void Shell::loop() {
     mods[active]->draw();
   }
 }
+
+void Shell::checkUsbAutoTrigger() {
+  static uint32_t lastCheck = 0;
+  static bool wasPlugged = false;
+  if (millis() - lastCheck < 500) return;
+  lastCheck = millis();
+
+  bool isPlugged = false;
+#if __has_include("tusb.h")
+  isPlugged = tud_mounted();
+#endif
+
+  if (isPlugged && !wasPlugged) {
+    for (int i = 0; i < nmods; i++) {
+      if (strcmp(mods[i]->name(), "HID Inject") == 0) {
+        enter(i);
+        return;
+      }
+    }
+  }
+  wasPlugged = isPlugged;
+}
diff --git a/src/core/shell.h b/src/core/shell.h
index 5facb71..d5e99eb 100644
--- a/src/core/shell.h
+++ b/src/core/shell.h
@@ -8,7 +8,7 @@ public:
   void begin();
   void loop();
 private:
-  static constexpr int MAX = 12;
+  static constexpr int MAX = 50;
   Module* mods[MAX]; int nmods = 0;
   int sel = 0;              // menu cursor
   int active = -1;          // -1 == in menu
@@ -17,4 +17,5 @@ private:
   void drawMenu(bool force = false);
   void enter(int i);
   void back();
+  void checkUsbAutoTrigger();
 };