code/CarSpotController.cpp

@@ -0,0 +1,31 @@
+class CarSpotCOntroller {
+
+    private:
+        int total_spots;
+        int occupied_spots;
+
+    public:
+        CarSpotCOntroller(int default_total_spots) {
+            this->set_total_spots(default_total_spots);
+        }
+
+        int get_total_spots() { 
+            return this->total_spots; 
+        }
+        
+        void set_total_spots(int total_spots) {
+            this->total_spots = total_spots; 
+        }
+
+        int get_occupied_spots() { 
+            return this->occupied_spots;
+        }
+        
+        void set_occupied_spots(int occupied_spots) {
+            this->occupied_spots = occupied_spots; 
+        }
+
+        void increment_occupied_spots () {
+            this->occupied_spots++;
+        }
+};

code/LCDScreen.cpp

@@ -51,4 +51,20 @@ class LCDScreen {
             lcd.print(this->default_message);
         }
 
+        void display_parking_spots(int total_spots, int occupied_spots){
+            if (this->state != DISPLAY_PARKING_SPOTS){
+                this->clear();
+                this->state = DISPLAY_PARKING_SPOTS;
+            }
+            int free_spots = total_spots - occupied_spots;
+            lcd.setCursor(0, 0);
+            lcd.print("Occupied: ");
+            lcd.print(occupied_spots);
+            lcd.print(" / ");
+            lcd.print(total_spots);
+            lcd.setCursor(0, 1);
+            lcd.print("Free: ");
+            lcd.print(free_spots);
+        }
+
 };

code/code.ino

@@ -5,6 +5,7 @@
 #include "Barrier.cpp";
 #include "DistSensor.cpp";
 #include "LCDScreen.cpp";
+#include "CarSpotController.cpp";
 
 #define ULTRASONIC_SENSOR_PIN_TRIG 11
 #define ULTRASONIC_SENSOR_PIN_ECHO 12
@@ -17,6 +18,7 @@ DallasTemperature temperature_sensors(&oneWire);
 DistSensor dist_sensor = DistSensor(ULTRASONIC_SENSOR_PIN_TRIG, ULTRASONIC_SENSOR_PIN_ECHO, 25.0);
 Barrier barrier = Barrier(SERVO_PIN, 4);
 LCDScreen screen = LCDScreen();
+CarSpotCOntroller car_spot_controller = CarSpotCOntroller(24);
 
 unsigned long current_time, sensor_last_time_activated, temperature_last_time_measured;
 
@@ -39,6 +41,7 @@ void loop() {
         sensor_last_time_activated = current_time;
         if(barrier.is_closed()){
             barrier.open();
+            car_spot_controller.increment_occupied_spots();
         }
     } else if (!dist_sensor.is_in_range() && barrier.is_open()){
         if (current_time - sensor_last_time_activated >= barrier.open_time_seconds * 1000){
@@ -52,5 +55,8 @@ void loop() {
         temperature_in_c = temperature_sensors.getTempCByIndex(0);
     }
 
-    screen.display_temperature(temperature_in_c);
+    //screen.display_temperature(temperature_in_c);
+
+    screen.display_parking_spots(car_spot_controller.get_total_spots(), car_spot_controller.get_occupied_spots());
+
 }