open and close p[ort on each display loop

main.cpp

@@ -99,6 +99,7 @@ void displayThread(std::stop_token st, Sensors* s) {
     lcd.setCustomChar(0, {16, 6, 9, 8, 8, 9, 6, 0});     // celcius
     lcd.setCustomChar(1, {0, 0, 4, 10, 10, 17, 31, 0});  // delta
     lcd.setCustomChar(2, {0, 8, 21, 21, 2, 0, 0, 0});    // home (tilde)
+    lcd._close();
 
     while (!st.stop_requested()) {
         sem::display.acquire();  // holds the loop until sensor data is ready
@@ -145,8 +146,10 @@ void displayThread(std::stop_token st, Sensors* s) {
         lcd.flushBuf();
     }
 
+    lcd._open();
     lcd.clear();
     lcd.writeStr(2, 0, center("linuxSmartie closed", 40));
+    lcd._close();
 }
 
 int main(int argc, char* argv[]) {