open and close funcs

include/LCDDisplay.hpp

@@ -18,14 +18,18 @@
 
 class LCDDisplay {
    private:
-    uint8_t _lcd;
+    uint8_t _lcd = -1;
+    std::string _dev;
     char writebuf[LCD_LINES * LCD_COLS + 8];                       // 4x40 chars + 2x4 setcursor commands
     static constexpr bool dualDisp = (LCD_LINES * LCD_COLS > 80);  // is it dual display device or not, evauluated from the size at compile time
     void writeLines(std::array<std::string, 4> lines);             // do not use
-
+    
+    
    public:
     LCDDisplay(std::string dev, uint32_t baud = 0010002);  // from termios-baud.h, B115200
     ~LCDDisplay();
+    void _open();
+    void _close();
 
     void clear();
     void setContrast(uint8_t contrast);