code/Barrier.cpp

@@ -24,13 +24,17 @@ class Barrier {
         }
     
         void open(){
-            this->state = OPEN;
-            this->servo.write(0);
+            if (this->state != OPEN){
+                this->state = OPEN;
+                this->servo.write(0);
+            }
         }
 
         void close(){
-            this->state = CLOSED;
-            this->servo.write(90);
+            if(this->state != CLOSED){
+                this->state = CLOSED;
+                this->servo.write(90);
+            }
         }
 
         bool is_open() const {

code/LCDScreen.cpp

@@ -32,17 +32,22 @@ class LCDScreen {
         }
 
         void display_temperature(float temp){
-            this->state = DISPLAY_TEMPERATURE;
+            if (this->state != DISPLAY_TEMPERATURE){
+                this->clear();
+                this->state = DISPLAY_TEMPERATURE;
+            }
             lcd.setCursor(0, 0);
-            this->clear();
-            lcd.print(temp);
-            lcd.print(" C");
+            lcd.print("Temp: ");
+            lcd.print(temp,1);
+            lcd.print(" C   ");
         }
 
         void display_default_message(){
-            this->state = DISPLAY_DEFAULT_MESSAGE;
+            if (this->state != DISPLAY_DEFAULT_MESSAGE){
+                this->clear();
+                this->state = DISPLAY_DEFAULT_MESSAGE;
+            }
             lcd.setCursor(0, 0);
-            this->clear();
             lcd.print(this->default_message);
         }
 

code/code.ino

@@ -9,18 +9,19 @@
 #define ULTRASONIC_SENSOR_PIN_TRIG 11
 #define ULTRASONIC_SENSOR_PIN_ECHO 12
 #define SERVO_PIN 10
-#define SERVO_PIN 10
 #define TEMP_SENSOR_PIN 9
 
 OneWire oneWire(TEMP_SENSOR_PIN);
 DallasTemperature sensors(&oneWire);
 
 DistSensor dist_sensor = DistSensor(ULTRASONIC_SENSOR_PIN_TRIG, ULTRASONIC_SENSOR_PIN_ECHO, 25.0);
-Barrier barrier = Barrier(SERVO_PIN, 3);
+Barrier barrier = Barrier(SERVO_PIN, 4);
 LCDScreen screen = LCDScreen();
 
 unsigned long current_time, sensor_last_time_activated, temperature_last_time_measured;
 
+float tempC = 0;
+
 void setup() {
     Serial.begin(9600);
     dist_sensor.configure_pins();
@@ -48,10 +49,8 @@ void loop() {
     if (current_time - temperature_last_time_measured >= 1000){
         temperature_last_time_measured = current_time;
         sensors.requestTemperatures();
-        float tempC = sensors.getTempCByIndex(0);
-        screen.display_temperature(tempC);
+        tempC = sensors.getTempCByIndex(0);
     }
 
-
-     
+    screen.display_temperature(tempC);
 }