diff --git a/usrc/board/public_board.cpp b/usrc/board/public_board.cpp
index 2df44a5..605acfc 100644
--- a/usrc/board/public_board.cpp
+++ b/usrc/board/public_board.cpp
@@ -127,7 +127,18 @@ int PublicBoard::getBoardTypeId() {
     // return id;
   }
 }
-int PublicBoard::getBoardId() { return IdMgr::ins().getBoardId(getBoardTypeId()); }
+int PublicBoard::getBoardId() {
+  int boardIdoff = 0;
+  if (getBoardTypeId() == kH2O2SensorBoard) {
+    static ZGPIO id_from_machine;  // 消毒机上的开关
+    if (!id_from_machine.isInited()) {
+      id_from_machine.initAsInput(PE8, kxs_gpio_nopull, kxs_gpio_no_irq, false);
+    }
+    boardIdoff = id_from_machine.read() ? 1 : 2;
+  }
+
+  return IdMgr::ins().getBoardId(getBoardTypeId()) + boardIdoff;
+}
 
 namespace iflytop {
 bool isBoardType(int32_t val0) {