add thread for rfid_reader

project/rfid/rfid_reader.hpp

@@ -2,6 +2,7 @@
 #define RFIDREADER_HPP_
 
 #include <cstdint>
+#include <thread>
 
 #include "MFRC522.h"
 
@@ -17,6 +18,7 @@ public:
 private:
 	MFRC522 mfrc;
 	uint32_t uid;
+	std::thread thread;
 };