diff --git a/lib/BoardFinder/BoardFinder.cpp b/lib/BoardFinder/BoardFinder.cpp
index c8eb972..0e076e0 100644
--- a/lib/BoardFinder/BoardFinder.cpp
+++ b/lib/BoardFinder/BoardFinder.cpp
@@ -6,7 +6,7 @@ BoardConfig::BoardConfig(String name, BoardType type, uint8_t oledsda, uint8_t o
     : Name(name), Type(type), OledSda(oledsda), OledScl(oledscl), OledAddr(oledaddr), OledReset(oledreset), LoraSck(lorasck), LoraMiso(loramiso), LoraMosi(loramosi), LoraCS(loracs), LoraReset(lorareset), LoraIRQ(lorairq), needCheckPowerChip(needcheckpowerchip), powerCheckStatus(powercheckstatus) {
 }
 
-BoardFinder::BoardFinder(std::list<BoardConfig const *> boardConfigs) : _boardConfigs(boardConfigs) {
+BoardFinder::BoardFinder(const std::list<BoardConfig const *> &boardConfigs) : _boardConfigs(boardConfigs) {
 }
 
 BoardConfig const *BoardFinder::searchBoardConfig() {
@@ -51,7 +51,7 @@ BoardConfig const *BoardFinder::searchBoardConfig() {
 }
 
 BoardConfig const *BoardFinder::getBoardConfig(String name) {
-  std::_List_iterator<BoardConfig const *> elem = std::find_if(_boardConfigs.begin(), _boardConfigs.end(), [&](BoardConfig const *conf) {
+  std::_List_const_iterator<BoardConfig const *> elem = std::find_if(_boardConfigs.begin(), _boardConfigs.end(), [&](BoardConfig const *conf) {
     return conf->Name == name;
   });
   if (elem == _boardConfigs.end()) {
diff --git a/lib/BoardFinder/BoardFinder.h b/lib/BoardFinder/BoardFinder.h
index a18f674..142de6d 100644
--- a/lib/BoardFinder/BoardFinder.h
+++ b/lib/BoardFinder/BoardFinder.h
@@ -45,14 +45,14 @@ public:
 
 class BoardFinder {
 public:
-  explicit BoardFinder(std::list<BoardConfig const *> boardConfigs);
+  explicit BoardFinder(const std::list<BoardConfig const *> &boardConfigs);
 
   BoardConfig const *searchBoardConfig();
 
   BoardConfig const *getBoardConfig(String name);
 
 private:
-  std::list<BoardConfig const *> _boardConfigs;
+  const std::list<BoardConfig const *> &_boardConfigs;
 
   bool checkOledConfig(BoardConfig const *boardConfig);
   bool checkModemConfig(BoardConfig const *boardConfig);