diff --git a/code/Barrier.cpp b/code/Barrier.cpp
index bf5ce20..4f6b283 100644
--- a/code/Barrier.cpp
+++ b/code/Barrier.cpp
@@ -21,6 +21,8 @@ class Barrier {
 
         void configure_pins(){
             this->servo.attach(pin);
+            this->servo.write(90);
+            this->state = CLOSED;
         }
     
         void open(){
diff --git a/code/ButtonController.cpp b/code/ButtonController.cpp
new file mode 100644
index 0000000..87ee7da
--- /dev/null
+++ b/code/ButtonController.cpp
@@ -0,0 +1,40 @@
+#include <Arduino.h>
+
+class ButtonController {
+
+    private:
+        int pin;
+        int new_value;
+        int old_value = HIGH;
+
+    public:
+        ButtonController(int pin){
+            this->set_pin(pin);
+        };
+
+        void configure_pins(){
+            pinMode(this->pin, INPUT_PULLUP);
+        }
+
+        void set_pin(int pin){
+            this->pin = pin;
+        }
+
+        void read(){
+            this->new_value = digitalRead(this->pin);
+        }
+
+        bool value_changed(){
+            return (this->new_value != this->old_value);
+        }
+
+        bool is_pressed(){
+            if(this->value_changed()){
+                bool is_pressed = (this->new_value == LOW);
+                this->old_value = this->new_value;
+                return is_pressed;
+            }
+            return this->new_value == LOW;
+        }
+
+};
\ No newline at end of file
diff --git a/code/CarSpotController.cpp b/code/CarSpotController.cpp
new file mode 100644
index 0000000..85e919d
--- /dev/null
+++ b/code/CarSpotController.cpp
@@ -0,0 +1,51 @@
+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++;
+        }
+
+        void increment_total_spots () {
+            this->total_spots++;
+        }
+
+        void decrement_total_spots () {
+            this->total_spots--;
+        }
+
+        void decrement_occupied_spots () {
+            this->occupied_spots--;
+        }
+
+        bool is_full() {
+            return this->occupied_spots == this->total_spots;
+        }
+
+        bool is_empty() {
+            return this->occupied_spots == 0;
+        }
+};
\ No newline at end of file
diff --git a/code/DistSensor.cpp b/code/DistSensor.cpp
index abe839b..1fdaa39 100644
--- a/code/DistSensor.cpp
+++ b/code/DistSensor.cpp
@@ -9,7 +9,7 @@ class DistSensor {
 
         void make_measurement(){
             digitalWrite(this->trig_pin, HIGH);
-            delayMicroseconds(10);
+            //delayMicroseconds(10);
             digitalWrite(this->trig_pin, LOW);
         }
 
diff --git a/code/EncoderController.cpp b/code/EncoderController.cpp
new file mode 100644
index 0000000..4ce0598
--- /dev/null
+++ b/code/EncoderController.cpp
@@ -0,0 +1,90 @@
+#include <Arduino.h>
+
+enum EncoderDirection {
+    COUNTERCLOCKWISE = 2,
+    STOPPED = 0,
+    CLOCKWISE = 1,
+};
+
+enum ButtonState {
+    PRESSED = 0,
+    RELEASED = 1,
+};
+
+class EncoderController {
+
+    private:
+        int pin_clk;
+        int pin_dt;
+        int last_clk = HIGH;
+        int new_clk;
+        int dt_value;
+        EncoderDirection current_direction;
+        int pin_btn;
+        int button;
+        bool last_button_state = HIGH; // começa como solto
+        bool button_click_registered = false;
+
+    public:
+        EncoderController(int pin_dt, int pin_clk, int pin_btn) {
+            this->pin_dt = pin_dt;
+            this->pin_clk = pin_clk;
+            this->pin_btn = pin_btn;
+        }
+
+        void configure_pins() {
+            pinMode(this->pin_dt, INPUT_PULLUP);
+            pinMode(this->pin_clk, INPUT_PULLUP);
+            pinMode(this->pin_btn, INPUT_PULLUP);
+        }
+
+        bool clk_pin_changed(){
+            this->new_clk = digitalRead(this->pin_clk);
+            return this->new_clk != this->last_clk;
+        }
+
+        void read(){
+            if (this->clk_pin_changed()) {
+                this->last_clk = this->new_clk;
+                this->dt_value = digitalRead(this->pin_dt);
+                if (this->new_clk == LOW && this->dt_value == HIGH) {
+                    
+                    this->current_direction = CLOCKWISE;
+                }
+                if (this->new_clk == LOW && this->dt_value == LOW) {
+                    
+                    this->current_direction = COUNTERCLOCKWISE;
+                }
+            }
+
+            int current_state = digitalRead(this->pin_btn);
+            if (this->last_button_state == HIGH && current_state == LOW) {
+                this->button_click_registered = true;
+            }
+            this->last_button_state = current_state;
+        }
+
+        bool rotated_clockwise(){
+            if(this->current_direction == CLOCKWISE){
+                this->current_direction = STOPPED;
+                return true; 
+            }   
+            return false;
+        }
+
+        bool rotated_counterclockwise(){
+            if(this->current_direction == COUNTERCLOCKWISE){
+                this->current_direction = STOPPED;
+                return true; 
+            }   
+            return false;
+        }
+
+        bool button_pressed(){
+           if (this->button_click_registered) {
+                this->button_click_registered = false;
+                return true;
+            }
+            return false;
+        }
+};
\ No newline at end of file
diff --git a/code/JoyStickController.cpp b/code/JoyStickController.cpp
new file mode 100644
index 0000000..5ece73c
--- /dev/null
+++ b/code/JoyStickController.cpp
@@ -0,0 +1,69 @@
+#import "Arduino.h"
+
+class JoystickController {
+
+    private:
+        int pin_x;
+        int pin_y;
+        int x = 1024 / 2;
+        int y = 1024 / 2;
+
+    public:
+        JoystickController(int pin_x, int pin_y) {
+            this->set_pin_x(pin_x);
+            this->set_pin_y(pin_y);
+        }
+
+        void configure_pins() {
+            pinMode(this->pin_x, INPUT);
+            pinMode(this->pin_y, INPUT);
+        }
+
+        int get_x() {
+            return this->x;
+        }
+
+        int get_y() {
+            return this->y;
+        }
+        
+        void set_x(int x) {
+            this->x = x;
+        }
+
+        void set_y(int y) {
+            this->y = y;
+        }
+
+        int get_pin_x() {
+            return this->pin_x;
+        }
+
+        void set_pin_x(int pin_x) {
+            this->pin_x = pin_x;
+        }
+
+        int get_pin_y() {
+            return this->pin_y;
+        }
+
+        void set_pin_y(int pin_y) {
+            this->pin_y = pin_y;
+        }
+
+        void read(){
+            this->set_y(analogRead(this->pin_y));
+            this->set_x(analogRead(this->pin_x));
+        }
+
+        bool is_moving_right(){
+            this->read();
+            return this->get_x() < 512;
+        }
+
+        bool is_moving_left(){
+            this->read();
+            return this->get_x() > 512;
+        }
+
+};
\ No newline at end of file
diff --git a/code/LCDScreen.cpp b/code/LCDScreen.cpp
index e9e2f64..6eb2ce3 100644
--- a/code/LCDScreen.cpp
+++ b/code/LCDScreen.cpp
@@ -2,19 +2,26 @@
 #include <LiquidCrystal_I2C.h>
 
 enum LCDScreenState {
-    DISPLAY_DEFAULT_MESSAGE,
+    DISPLAY_DEFAULT_MESSAGE = 0,
     DISPLAY_TEMPERATURE,
-    DISPLAY_PARKING_SPOTS
+    DISPLAY_PARKING_SPOTS,
+    CONFIGURATION_SCREEN
 };
 
 class LCDScreen {
 
     private:
         LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27,20,4);
-        LCDScreenState state;
+        LCDScreenState current_state = 0;
         String default_message = "Bem vindo!";
 
     public:
+        LCDScreenState ordered_states[3] = {
+            DISPLAY_DEFAULT_MESSAGE,
+            DISPLAY_TEMPERATURE,
+            DISPLAY_PARKING_SPOTS
+        };
+
         LCDScreen(String default_message = ""){
             if (default_message != ""){
                 this->default_message = default_message;
@@ -32,10 +39,7 @@ class LCDScreen {
         }
 
         void display_temperature(float temp){
-            if (this->state != DISPLAY_TEMPERATURE){
-                this->clear();
-                this->state = DISPLAY_TEMPERATURE;
-            }
+            
             lcd.setCursor(0, 0);
             lcd.print("Temp: ");
             lcd.print(temp,1);
@@ -43,12 +47,72 @@ class LCDScreen {
         }
 
         void display_default_message(){
-            if (this->state != DISPLAY_DEFAULT_MESSAGE){
-                this->clear();
-                this->state = DISPLAY_DEFAULT_MESSAGE;
-            }
+            
             lcd.setCursor(0, 0);
             lcd.print(this->default_message);
         }
 
-};
\ No newline at end of file
+        void display_parking_spots(int total_spots, int occupied_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);
+        }
+
+        void display_configuration_screen(int total_spots){
+            if (this->current_state != CONFIGURATION_SCREEN){
+                this->current_state = CONFIGURATION_SCREEN;
+                this->clear();
+                lcd.setCursor(0, 0);
+                lcd.print("Conf. Mode");
+            }
+            lcd.setCursor(0, 1);
+            lcd.print("Total Spots = ");
+            if (total_spots < 10){
+                lcd.print("0");
+                lcd.print(total_spots);
+            }else {
+                lcd.print(total_spots);
+            }
+        }
+
+        LCDScreenState get_next_state(){
+            if (this->current_state == 2){
+                return this->ordered_states[0];
+            }
+            return this->ordered_states[this->current_state + 1];
+        }
+
+        LCDScreenState get_previous_state(){
+            if (this->current_state == 0){
+                return this->ordered_states[2];
+            }
+            return this->ordered_states[this->current_state - 1];
+        }
+
+        void set_state(LCDScreenState state){
+            this->clear();
+            this->current_state = state;
+        }
+
+        void display(float temperature_in_c, int total_spots, int occupied_spots){
+            switch(this->current_state){
+                case DISPLAY_DEFAULT_MESSAGE:
+                    this->display_default_message();
+                    break;
+                case DISPLAY_TEMPERATURE:
+                    this->display_temperature(temperature_in_c);
+                    break;
+                case DISPLAY_PARKING_SPOTS:
+                    this->display_parking_spots(total_spots, occupied_spots);
+                    break;
+            }
+        }
+
+};
diff --git a/code/code.ino b/code/code.ino
index 0e4d921..a22e73e 100644
--- a/code/code.ino
+++ b/code/code.ino
@@ -1,56 +1,167 @@
 #include <Wire.h>
 #include <OneWire.h>
 #include <DallasTemperature.h>
+#include <Stepper.h>
 
 #include "Barrier.cpp";
 #include "DistSensor.cpp";
 #include "LCDScreen.cpp";
+#include "CarSpotController.cpp";
+#include "JoyStickController.cpp";
+#include "ButtonController.cpp";
+#include "EncoderController.cpp";
 
 #define ULTRASONIC_SENSOR_PIN_TRIG 11
 #define ULTRASONIC_SENSOR_PIN_ECHO 12
 #define SERVO_PIN 10
 #define TEMP_SENSOR_PIN 9
+#define JOYSTICK_X_PIN A1
+#define JOYSTICK_Y_PIN A0
+#define BUZZER_PIN 3
+#define BUTTON_PIN 8
+#define STEPPER_B_MINUS_PIN 6
+#define STEPPER_B_PLUS_PIN 5
+#define STEPPER_A_PLUS_PIN 4
+#define STEPPER_A_MINUS_PIN 2
+#define ENCODER_CLK_PIN 7
+#define ENCODER_DT_PIN  A2
+#define ENCODER_SW_PIN  A3
+
+#define PARK_SLOTS 3
+#define STEP_MOTOR_STEPS 200
+
+enum ProgramState {
+    CONFIG_MODE,
+    APP_MODE
+};
 
 OneWire oneWire(TEMP_SENSOR_PIN);
 DallasTemperature temperature_sensors(&oneWire);
 
 DistSensor dist_sensor = DistSensor(ULTRASONIC_SENSOR_PIN_TRIG, ULTRASONIC_SENSOR_PIN_ECHO, 25.0);
-Barrier barrier = Barrier(SERVO_PIN, 4);
+Barrier barrier = Barrier(SERVO_PIN, 2);
 LCDScreen screen = LCDScreen();
+CarSpotController car_spot_controller = CarSpotController(PARK_SLOTS);
+JoystickController joystick = JoystickController(JOYSTICK_X_PIN, JOYSTICK_Y_PIN);
+ButtonController button = ButtonController(BUTTON_PIN);
+Stepper stepper(STEP_MOTOR_STEPS, STEPPER_B_MINUS_PIN, STEPPER_B_PLUS_PIN, STEPPER_A_PLUS_PIN, STEPPER_A_MINUS_PIN);
+EncoderController encoder = EncoderController(ENCODER_DT_PIN, ENCODER_CLK_PIN,ENCODER_SW_PIN);
 
-unsigned long current_time, sensor_last_time_activated, temperature_last_time_measured;
+unsigned long current_time, sensor_last_time_readed, barrier_last_time_opened, temperature_last_time_measured, joystick_last_time_activated, joystick_last_time_readed, screen_last_time_updated, encoder_last_time_readed;
 
 float temperature_in_c = 0;
 
+ProgramState program_state = CONFIG_MODE;
+
 void setup() {
-    Serial.begin(9600);
+    Serial.begin(115200);
     dist_sensor.configure_pins();
     barrier.configure_pins();
     temperature_sensors.begin();
+    joystick.configure_pins();
+    button.configure_pins();
+    stepper.setSpeed(60);
+    encoder.configure_pins();
     screen.init();
-
 }
 
 void loop() {
 
     current_time = millis();
+    
+    switch (program_state){
+        case CONFIG_MODE:
+            run_config_mode();
+            break;
+        case APP_MODE:
+            run_program();
+            break;
+    }  
+}
 
-    if (dist_sensor.is_in_range()){ 
-        sensor_last_time_activated = current_time;
-        if(barrier.is_closed()){
-            barrier.open();
+void run_config_mode (){
+    static bool is_first_time = true;
+    if (is_first_time){
+        screen.display_configuration_screen(car_spot_controller.get_total_spots());
+        is_first_time = false;
+    }
+    encoder.read();
+    if (encoder.rotated_clockwise()){
+        if (car_spot_controller.get_total_spots() < 15){
+            car_spot_controller.increment_total_spots();
+            screen.display_configuration_screen(car_spot_controller.get_total_spots());
         }
-    } else if (!dist_sensor.is_in_range() && barrier.is_open()){
-        if (current_time - sensor_last_time_activated >= barrier.open_time_seconds * 1000){
-            barrier.close();
+    }
+    if (encoder.rotated_counterclockwise()){
+        if (car_spot_controller.get_total_spots() > 1 && car_spot_controller.get_occupied_spots() < car_spot_controller.get_total_spots()){
+            car_spot_controller.decrement_total_spots();
+            screen.display_configuration_screen(car_spot_controller.get_total_spots());
+        }
+    }
+    if (encoder.button_pressed()){
+        program_state = APP_MODE;
+        screen.set_state(0);
+        return;
+    }       
+}
+
+void run_program(){
+    
+    button.read();
+    if (button.is_pressed()){
+        barrier_last_time_opened = current_time;
+        if (!car_spot_controller.is_empty() && barrier.is_closed()){
+            barrier.open();
+            stepper.step(STEP_MOTOR_STEPS);
+            car_spot_controller.decrement_occupied_spots();
+        }
+    }
+
+    if (current_time - sensor_last_time_readed >= 1000){
+        if (dist_sensor.is_in_range()){ 
+            barrier_last_time_opened = current_time;
+            if(barrier.is_closed()){
+                if (!car_spot_controller.is_full()){
+                    barrier.open();
+                    car_spot_controller.increment_occupied_spots();
+                    stepper.step(STEP_MOTOR_STEPS);
+                }else{
+                    tone(BUZZER_PIN, 262, 500);
+                }
+            }
+        } else if (!dist_sensor.is_in_range() && barrier.is_open()){
+            if (current_time - barrier_last_time_opened >= barrier.open_time_seconds * 1000 && !button.is_pressed()){
+                barrier.close();
+                stepper.step(-STEP_MOTOR_STEPS);
+            }
         }
     }
 
     if (current_time - temperature_last_time_measured >= 1000){
         temperature_last_time_measured = current_time;
+        temperature_sensors.setWaitForConversion(false);
         temperature_sensors.requestTemperatures();
         temperature_in_c = temperature_sensors.getTempCByIndex(0);
     }
 
-    screen.display_temperature(temperature_in_c);
-}
+    if (joystick.is_moving_right() && current_time - joystick_last_time_activated >= 450){
+        joystick_last_time_activated = current_time;
+        screen.set_state((screen.get_next_state()));
+    }
+    if (joystick.is_moving_left() && current_time - joystick_last_time_activated >= 450){
+        joystick_last_time_activated = current_time;
+        screen.set_state(screen.get_previous_state());
+    }
+
+    if (current_time - screen_last_time_updated >= 500){
+        screen_last_time_updated = current_time;
+        screen.display(temperature_in_c,car_spot_controller.get_total_spots(), car_spot_controller.get_occupied_spots());
+    }
+
+    encoder.read();
+    if (encoder.button_pressed()){
+        program_state = CONFIG_MODE;
+        screen.display_configuration_screen(car_spot_controller.get_total_spots());
+        return;
+    }
+}
\ No newline at end of file
diff --git a/diagram.json b/diagram.json
index 4553d45..065d6f3 100644
--- a/diagram.json
+++ b/diagram.json
@@ -34,9 +34,8 @@
     {
       "type": "wokwi-analog-joystick",
       "id": "joystick1",
-      "top": -99.1,
-      "left": -62.9,
-      "rotate": 90,
+      "top": -115.8,
+      "left": -90.6,
       "attrs": {}
     },
     {
@@ -53,6 +52,14 @@
       "left": 18.65,
       "rotate": 90,
       "attrs": { "value": "4700" }
+    },
+    {
+      "type": "wokwi-stepper-motor",
+      "id": "stepper1",
+      "top": -387.25,
+      "left": -376.54,
+      "rotate": 90,
+      "attrs": { "size": "14" }
     }
   ],
   "connections": [
@@ -80,10 +87,10 @@
     [ "bb1:tp.9", "servo1:V+", "red", [ "v-94.1", "h7.6", "v-105.7" ] ],
     [ "bb1:tn.10", "servo1:GND", "black", [ "v0" ] ],
     [ "servo1:PWM", "uno:10", "orange", [ "h-124.8", "v-19", "h-58.3" ] ],
-    [ "joystick1:GND", "bb1:tn.36", "black", [ "h0" ] ],
-    [ "joystick1:VCC", "bb1:tp.35", "red", [ "h0" ] ],
-    [ "joystick1:VERT", "bb1:42t.a", "green", [ "h0" ] ],
-    [ "joystick1:HORZ", "bb1:44t.a", "blue", [ "h0" ] ],
+    [ "joystick1:GND", "bb1:tn.36", "black", [ "v57.6", "h-55.6" ] ],
+    [ "joystick1:VCC", "bb1:tp.35", "red", [ "v48", "h-36.4" ] ],
+    [ "joystick1:VERT", "bb1:42t.a", "green", [ "v67.2", "h-56.4" ] ],
+    [ "joystick1:HORZ", "bb1:44t.a", "blue", [ "v67.2", "h-46.8" ] ],
     [ "bb1:42t.b", "uno:A0", "green", [ "v1.6", "h-327.6", "v-86.4", "h-51.8" ] ],
     [ "bb1:44t.c", "uno:A1", "blue", [ "v1.6", "h-337.2", "v-105.6", "h-51.9" ] ],
     [ "lcd1:GND", "bb1:tn.28", "black", [ "h0" ] ],
@@ -94,16 +101,20 @@
     [ "bb1:57b.f", "bb1:57t.e", "black", [ "v0" ] ],
     [ "uno:9", "bb1:58t.d", "blue", [ "v480", "h519.2", "v-136" ] ],
     [ "bb1:58b.f", "bb1:58t.e", "violet", [ "v0" ] ],
-    [ "btn1:1.l", "bb1:4t.c", "", [ "$bb" ] ],
-    [ "btn1:2.l", "bb1:2t.c", "", [ "$bb" ] ],
-    [ "btn1:1.r", "bb1:4b.h", "", [ "$bb" ] ],
-    [ "btn1:2.r", "bb1:2b.h", "", [ "$bb" ] ],
+    [ "uno:A4", "bb1:37b.g", "gray", [ "v0" ] ],
+    [ "uno:A5", "bb1:38b.h", "purple", [ "v0" ] ],
+    [ "stepper1:A-", "uno:2", "green", [ "h0" ] ],
+    [ "stepper1:A+", "uno:4", "green", [ "h0" ] ],
+    [ "stepper1:B+", "uno:5", "green", [ "h0" ] ],
+    [ "stepper1:B-", "uno:6", "green", [ "h0" ] ],
     [ "r1:1", "bb1:58b.g", "", [ "$bb" ] ],
     [ "temp1:GND", "bb1:57t.c", "", [ "$bb" ] ],
     [ "temp1:DQ", "bb1:58t.c", "", [ "$bb" ] ],
     [ "temp1:VCC", "bb1:59t.c", "", [ "$bb" ] ],
-    [ "uno:A4", "bb1:37b.g", "gray", [ "v0" ] ],
-    [ "uno:A5", "bb1:38b.h", "purple", [ "v0" ] ]
+    [ "btn1:1.l", "bb1:4t.c", "", [ "$bb" ] ],
+    [ "btn1:2.l", "bb1:2t.c", "", [ "$bb" ] ],
+    [ "btn1:1.r", "bb1:4b.h", "", [ "$bb" ] ],
+    [ "btn1:2.r", "bb1:2b.h", "", [ "$bb" ] ]
   ],
   "dependencies": {}
 }
\ No newline at end of file
diff --git a/libs/Stepper/README.adoc b/libs/Stepper/README.adoc
new file mode 100644
index 0000000..9d4d052
--- /dev/null
+++ b/libs/Stepper/README.adoc
@@ -0,0 +1,26 @@
+= Stepper Library for Arduino =
+
+This library allows you to control unipolar or bipolar stepper motors. To use it you will need a stepper motor, and the appropriate hardware to control it.
+
+For more information about this library please visit us at
+http://www.arduino.cc/en/Reference/Stepper
+
+== License ==
+
+Copyright (c) Arduino LLC. All right reserved.
+Copyright (c) Sebastian Gassner. All right reserved.
+Copyright (c) Noah Shibley. All right reserved.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
diff --git a/libs/Stepper/examples/MotorKnob/MotorKnob.ino b/libs/Stepper/examples/MotorKnob/MotorKnob.ino
new file mode 100644
index 0000000..5cf12ec
--- /dev/null
+++ b/libs/Stepper/examples/MotorKnob/MotorKnob.ino
@@ -0,0 +1,39 @@
+/*
+ * MotorKnob
+ *
+ * A stepper motor follows the turns of a potentiometer
+ * (or other sensor) on analog input 0.
+ *
+ * http://www.arduino.cc/en/Reference/Stepper
+ * This example code is in the public domain.
+ */
+
+#include <Stepper.h>
+
+// change this to the number of steps on your motor
+#define STEPS 100
+
+// create an instance of the stepper class, specifying
+// the number of steps of the motor and the pins it's
+// attached to
+Stepper stepper(STEPS, 8, 9, 10, 11);
+
+// the previous reading from the analog input
+int previous = 0;
+
+void setup() {
+  // set the speed of the motor to 30 RPMs
+  stepper.setSpeed(30);
+}
+
+void loop() {
+  // get the sensor value
+  int val = analogRead(0);
+
+  // move a number of steps equal to the change in the
+  // sensor reading
+  stepper.step(val - previous);
+
+  // remember the previous value of the sensor
+  previous = val;
+}
\ No newline at end of file
diff --git a/libs/Stepper/examples/stepper_oneRevolution/stepper_oneRevolution.ino b/libs/Stepper/examples/stepper_oneRevolution/stepper_oneRevolution.ino
new file mode 100644
index 0000000..373eb60
--- /dev/null
+++ b/libs/Stepper/examples/stepper_oneRevolution/stepper_oneRevolution.ino
@@ -0,0 +1,44 @@
+
+/*
+ Stepper Motor Control - one revolution
+
+ This program drives a unipolar or bipolar stepper motor.
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+
+ The motor should revolve one revolution in one direction, then
+ one revolution in the other direction.
+
+
+ Created 11 Mar. 2007
+ Modified 30 Nov. 2009
+ by Tom Igoe
+
+ */
+
+#include <Stepper.h>
+
+const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
+// for your motor
+
+// initialize the stepper library on pins 8 through 11:
+Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
+
+void setup() {
+  // set the speed at 60 rpm:
+  myStepper.setSpeed(60);
+  // initialize the serial port:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // step one revolution  in one direction:
+  Serial.println("clockwise");
+  myStepper.step(stepsPerRevolution);
+  delay(500);
+
+  // step one revolution in the other direction:
+  Serial.println("counterclockwise");
+  myStepper.step(-stepsPerRevolution);
+  delay(500);
+}
+
diff --git a/libs/Stepper/examples/stepper_oneStepAtATime/stepper_oneStepAtATime.ino b/libs/Stepper/examples/stepper_oneStepAtATime/stepper_oneStepAtATime.ino
new file mode 100644
index 0000000..e6c141f
--- /dev/null
+++ b/libs/Stepper/examples/stepper_oneStepAtATime/stepper_oneStepAtATime.ino
@@ -0,0 +1,44 @@
+
+/*
+ Stepper Motor Control - one step at a time
+
+ This program drives a unipolar or bipolar stepper motor.
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+
+ The motor will step one step at a time, very slowly.  You can use this to
+ test that you've got the four wires of your stepper wired to the correct
+ pins. If wired correctly, all steps should be in the same direction.
+
+ Use this also to count the number of steps per revolution of your motor,
+ if you don't know it.  Then plug that number into the oneRevolution
+ example to see if you got it right.
+
+ Created 30 Nov. 2009
+ by Tom Igoe
+
+ */
+
+#include <Stepper.h>
+
+const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
+// for your motor
+
+// initialize the stepper library on pins 8 through 11:
+Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
+
+int stepCount = 0;         // number of steps the motor has taken
+
+void setup() {
+  // initialize the serial port:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // step one step:
+  myStepper.step(1);
+  Serial.print("steps:");
+  Serial.println(stepCount);
+  stepCount++;
+  delay(500);
+}
+
diff --git a/libs/Stepper/examples/stepper_speedControl/stepper_speedControl.ino b/libs/Stepper/examples/stepper_speedControl/stepper_speedControl.ino
new file mode 100644
index 0000000..5eb4f6a
--- /dev/null
+++ b/libs/Stepper/examples/stepper_speedControl/stepper_speedControl.ino
@@ -0,0 +1,48 @@
+
+/*
+ Stepper Motor Control - speed control
+
+ This program drives a unipolar or bipolar stepper motor.
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+ A potentiometer is connected to analog input 0.
+
+ The motor will rotate in a clockwise direction. The higher the potentiometer value,
+ the faster the motor speed. Because setSpeed() sets the delay between steps,
+ you may notice the motor is less responsive to changes in the sensor value at
+ low speeds.
+
+ Created 30 Nov. 2009
+ Modified 28 Oct 2010
+ by Tom Igoe
+
+ */
+
+#include <Stepper.h>
+
+const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
+// for your motor
+
+
+// initialize the stepper library on pins 8 through 11:
+Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);
+
+int stepCount = 0;  // number of steps the motor has taken
+
+void setup() {
+  // nothing to do inside the setup
+}
+
+void loop() {
+  // read the sensor value:
+  int sensorReading = analogRead(A0);
+  // map it to a range from 0 to 100:
+  int motorSpeed = map(sensorReading, 0, 1023, 0, 100);
+  // set the motor speed:
+  if (motorSpeed > 0) {
+    myStepper.setSpeed(motorSpeed);
+    // step 1/100 of a revolution:
+    myStepper.step(stepsPerRevolution / 100);
+  }
+}
+
+
diff --git a/libs/Stepper/keywords.txt b/libs/Stepper/keywords.txt
new file mode 100644
index 0000000..5e58a66
--- /dev/null
+++ b/libs/Stepper/keywords.txt
@@ -0,0 +1,28 @@
+#######################################
+# Syntax Coloring Map For Test
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+Stepper	KEYWORD1	Stepper
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+step	KEYWORD2
+setSpeed	KEYWORD2
+version	KEYWORD2
+
+######################################
+# Instances (KEYWORD2)
+#######################################
+direction	KEYWORD2
+speed	KEYWORD2
+
+
+#######################################
+# Constants (LITERAL1)
+#######################################
diff --git a/libs/Stepper/library.properties b/libs/Stepper/library.properties
new file mode 100644
index 0000000..875067a
--- /dev/null
+++ b/libs/Stepper/library.properties
@@ -0,0 +1,9 @@
+name=Stepper
+version=1.1.3
+author=Arduino
+maintainer=Arduino <info@arduino.cc>
+sentence=Allows Arduino boards to control a variety of stepper motors. 
+paragraph=This library allows you to control unipolar or bipolar stepper motors. To use it you will need a stepper motor, and the appropriate hardware to control it.
+category=Device Control
+url=http://www.arduino.cc/en/Reference/Stepper
+architectures=*
diff --git a/libs/Stepper/src/Stepper.cpp b/libs/Stepper/src/Stepper.cpp
new file mode 100644
index 0000000..1f76295
--- /dev/null
+++ b/libs/Stepper/src/Stepper.cpp
@@ -0,0 +1,365 @@
+/*
+ * Stepper.cpp - Stepper library for Wiring/Arduino - Version 1.1.0
+ *
+ * Original library        (0.1)   by Tom Igoe.
+ * Two-wire modifications  (0.2)   by Sebastian Gassner
+ * Combination version     (0.3)   by Tom Igoe and David Mellis
+ * Bug fix for four-wire   (0.4)   by Tom Igoe, bug fix from Noah Shibley
+ * High-speed stepping mod         by Eugene Kozlenko
+ * Timer rollover fix              by Eugene Kozlenko
+ * Five phase five wire    (1.1.0) by Ryan Orendorff
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *
+ * Drives a unipolar, bipolar, or five phase stepper motor.
+ *
+ * When wiring multiple stepper motors to a microcontroller, you quickly run
+ * out of output pins, with each motor requiring 4 connections.
+ *
+ * By making use of the fact that at any time two of the four motor coils are
+ * the inverse of the other two, the number of control connections can be
+ * reduced from 4 to 2 for the unipolar and bipolar motors.
+ *
+ * A slightly modified circuit around a Darlington transistor array or an
+ * L293 H-bridge connects to only 2 microcontroler pins, inverts the signals
+ * received, and delivers the 4 (2 plus 2 inverted ones) output signals
+ * required for driving a stepper motor. Similarly the Arduino motor shields
+ * 2 direction pins may be used.
+ *
+ * The sequence of control signals for 5 phase, 5 control wires is as follows:
+ *
+ * Step C0 C1 C2 C3 C4
+ *    1  0  1  1  0  1
+ *    2  0  1  0  0  1
+ *    3  0  1  0  1  1
+ *    4  0  1  0  1  0
+ *    5  1  1  0  1  0
+ *    6  1  0  0  1  0
+ *    7  1  0  1  1  0
+ *    8  1  0  1  0  0
+ *    9  1  0  1  0  1
+ *   10  0  0  1  0  1
+ *
+ * The sequence of control signals for 4 control wires is as follows:
+ *
+ * Step C0 C1 C2 C3
+ *    1  1  0  1  0
+ *    2  0  1  1  0
+ *    3  0  1  0  1
+ *    4  1  0  0  1
+ *
+ * The sequence of controls signals for 2 control wires is as follows
+ * (columns C1 and C2 from above):
+ *
+ * Step C0 C1
+ *    1  0  1
+ *    2  1  1
+ *    3  1  0
+ *    4  0  0
+ *
+ * The circuits can be found at
+ *
+ * http://www.arduino.cc/en/Tutorial/Stepper
+ */
+
+#include "Arduino.h"
+#include "Stepper.h"
+
+/*
+ * two-wire constructor.
+ * Sets which wires should control the motor.
+ */
+Stepper::Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2)
+{
+  this->step_number = 0;    // which step the motor is on
+  this->direction = 0;      // motor direction
+  this->last_step_time = 0; // time stamp in us of the last step taken
+  this->number_of_steps = number_of_steps; // total number of steps for this motor
+
+  // Arduino pins for the motor control connection:
+  this->motor_pin_1 = motor_pin_1;
+  this->motor_pin_2 = motor_pin_2;
+
+  // setup the pins on the microcontroller:
+  pinMode(this->motor_pin_1, OUTPUT);
+  pinMode(this->motor_pin_2, OUTPUT);
+
+  // When there are only 2 pins, set the others to 0:
+  this->motor_pin_3 = 0;
+  this->motor_pin_4 = 0;
+  this->motor_pin_5 = 0;
+
+  // pin_count is used by the stepMotor() method:
+  this->pin_count = 2;
+}
+
+
+/*
+ *   constructor for four-pin version
+ *   Sets which wires should control the motor.
+ */
+Stepper::Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2,
+                                      int motor_pin_3, int motor_pin_4)
+{
+  this->step_number = 0;    // which step the motor is on
+  this->direction = 0;      // motor direction
+  this->last_step_time = 0; // time stamp in us of the last step taken
+  this->number_of_steps = number_of_steps; // total number of steps for this motor
+
+  // Arduino pins for the motor control connection:
+  this->motor_pin_1 = motor_pin_1;
+  this->motor_pin_2 = motor_pin_2;
+  this->motor_pin_3 = motor_pin_3;
+  this->motor_pin_4 = motor_pin_4;
+
+  // setup the pins on the microcontroller:
+  pinMode(this->motor_pin_1, OUTPUT);
+  pinMode(this->motor_pin_2, OUTPUT);
+  pinMode(this->motor_pin_3, OUTPUT);
+  pinMode(this->motor_pin_4, OUTPUT);
+
+  // When there are 4 pins, set the others to 0:
+  this->motor_pin_5 = 0;
+
+  // pin_count is used by the stepMotor() method:
+  this->pin_count = 4;
+}
+
+/*
+ *   constructor for five phase motor with five wires
+ *   Sets which wires should control the motor.
+ */
+Stepper::Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2,
+                                      int motor_pin_3, int motor_pin_4,
+                                      int motor_pin_5)
+{
+  this->step_number = 0;    // which step the motor is on
+  this->direction = 0;      // motor direction
+  this->last_step_time = 0; // time stamp in us of the last step taken
+  this->number_of_steps = number_of_steps; // total number of steps for this motor
+
+  // Arduino pins for the motor control connection:
+  this->motor_pin_1 = motor_pin_1;
+  this->motor_pin_2 = motor_pin_2;
+  this->motor_pin_3 = motor_pin_3;
+  this->motor_pin_4 = motor_pin_4;
+  this->motor_pin_5 = motor_pin_5;
+
+  // setup the pins on the microcontroller:
+  pinMode(this->motor_pin_1, OUTPUT);
+  pinMode(this->motor_pin_2, OUTPUT);
+  pinMode(this->motor_pin_3, OUTPUT);
+  pinMode(this->motor_pin_4, OUTPUT);
+  pinMode(this->motor_pin_5, OUTPUT);
+
+  // pin_count is used by the stepMotor() method:
+  this->pin_count = 5;
+}
+
+/*
+ * Sets the speed in revs per minute
+ */
+void Stepper::setSpeed(long whatSpeed)
+{
+  this->step_delay = 60L * 1000L * 1000L / this->number_of_steps / whatSpeed;
+}
+
+/*
+ * Moves the motor steps_to_move steps.  If the number is negative,
+ * the motor moves in the reverse direction.
+ */
+void Stepper::step(int steps_to_move)
+{
+  int steps_left = abs(steps_to_move);  // how many steps to take
+
+  // determine direction based on whether steps_to_mode is + or -:
+  if (steps_to_move > 0) { this->direction = 1; }
+  if (steps_to_move < 0) { this->direction = 0; }
+
+
+  // decrement the number of steps, moving one step each time:
+  while (steps_left > 0)
+  {
+    unsigned long now = micros();
+    // move only if the appropriate delay has passed:
+    if (now - this->last_step_time >= this->step_delay)
+    {
+      // get the timeStamp of when you stepped:
+      this->last_step_time = now;
+      // increment or decrement the step number,
+      // depending on direction:
+      if (this->direction == 1)
+      {
+        this->step_number++;
+        if (this->step_number == this->number_of_steps) {
+          this->step_number = 0;
+        }
+      }
+      else
+      {
+        if (this->step_number == 0) {
+          this->step_number = this->number_of_steps;
+        }
+        this->step_number--;
+      }
+      // decrement the steps left:
+      steps_left--;
+      // step the motor to step number 0, 1, ..., {3 or 10}
+      if (this->pin_count == 5)
+        stepMotor(this->step_number % 10);
+      else
+        stepMotor(this->step_number % 4);
+    }
+  }
+}
+
+/*
+ * Moves the motor forward or backwards.
+ */
+void Stepper::stepMotor(int thisStep)
+{
+  if (this->pin_count == 2) {
+    switch (thisStep) {
+      case 0:  // 01
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+      break;
+      case 1:  // 11
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, HIGH);
+      break;
+      case 2:  // 10
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+      break;
+      case 3:  // 00
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, LOW);
+      break;
+    }
+  }
+  if (this->pin_count == 4) {
+    switch (thisStep) {
+      case 0:  // 1010
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+      break;
+      case 1:  // 0110
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+      break;
+      case 2:  //0101
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+      break;
+      case 3:  //1001
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+      break;
+    }
+  }
+
+  if (this->pin_count == 5) {
+    switch (thisStep) {
+      case 0:  // 01101
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+        digitalWrite(motor_pin_5, HIGH);
+        break;
+      case 1:  // 01001
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, LOW);
+        digitalWrite(motor_pin_5, HIGH);
+        break;
+      case 2:  // 01011
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+        digitalWrite(motor_pin_5, HIGH);
+        break;
+      case 3:  // 01010
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+        digitalWrite(motor_pin_5, LOW);
+        break;
+      case 4:  // 11010
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, HIGH);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+        digitalWrite(motor_pin_5, LOW);
+        break;
+      case 5:  // 10010
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, LOW);
+        digitalWrite(motor_pin_4, HIGH);
+        digitalWrite(motor_pin_5, LOW);
+        break;
+      case 6:  // 10110
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, HIGH);
+        digitalWrite(motor_pin_5, LOW);
+        break;
+      case 7:  // 10100
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+        digitalWrite(motor_pin_5, LOW);
+        break;
+      case 8:  // 10101
+        digitalWrite(motor_pin_1, HIGH);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+        digitalWrite(motor_pin_5, HIGH);
+        break;
+      case 9:  // 00101
+        digitalWrite(motor_pin_1, LOW);
+        digitalWrite(motor_pin_2, LOW);
+        digitalWrite(motor_pin_3, HIGH);
+        digitalWrite(motor_pin_4, LOW);
+        digitalWrite(motor_pin_5, HIGH);
+        break;
+    }
+  }
+}
+
+/*
+  version() returns the version of the library:
+*/
+int Stepper::version(void)
+{
+  return 5;
+}
diff --git a/libs/Stepper/src/Stepper.h b/libs/Stepper/src/Stepper.h
new file mode 100644
index 0000000..2e68979
--- /dev/null
+++ b/libs/Stepper/src/Stepper.h
@@ -0,0 +1,121 @@
+/*
+ * Stepper.h - Stepper library for Wiring/Arduino - Version 1.1.0
+ *
+ * Original library        (0.1)   by Tom Igoe.
+ * Two-wire modifications  (0.2)   by Sebastian Gassner
+ * Combination version     (0.3)   by Tom Igoe and David Mellis
+ * Bug fix for four-wire   (0.4)   by Tom Igoe, bug fix from Noah Shibley
+ * High-speed stepping mod         by Eugene Kozlenko
+ * Timer rollover fix              by Eugene Kozlenko
+ * Five phase five wire    (1.1.0) by Ryan Orendorff
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *
+ * Drives a unipolar, bipolar, or five phase stepper motor.
+ *
+ * When wiring multiple stepper motors to a microcontroller, you quickly run
+ * out of output pins, with each motor requiring 4 connections.
+ *
+ * By making use of the fact that at any time two of the four motor coils are
+ * the inverse of the other two, the number of control connections can be
+ * reduced from 4 to 2 for the unipolar and bipolar motors.
+ *
+ * A slightly modified circuit around a Darlington transistor array or an
+ * L293 H-bridge connects to only 2 microcontroler pins, inverts the signals
+ * received, and delivers the 4 (2 plus 2 inverted ones) output signals
+ * required for driving a stepper motor. Similarly the Arduino motor shields
+ * 2 direction pins may be used.
+ *
+ * The sequence of control signals for 5 phase, 5 control wires is as follows:
+ *
+ * Step C0 C1 C2 C3 C4
+ *    1  0  1  1  0  1
+ *    2  0  1  0  0  1
+ *    3  0  1  0  1  1
+ *    4  0  1  0  1  0
+ *    5  1  1  0  1  0
+ *    6  1  0  0  1  0
+ *    7  1  0  1  1  0
+ *    8  1  0  1  0  0
+ *    9  1  0  1  0  1
+ *   10  0  0  1  0  1
+ *
+ * The sequence of control signals for 4 control wires is as follows:
+ *
+ * Step C0 C1 C2 C3
+ *    1  1  0  1  0
+ *    2  0  1  1  0
+ *    3  0  1  0  1
+ *    4  1  0  0  1
+ *
+ * The sequence of controls signals for 2 control wires is as follows
+ * (columns C1 and C2 from above):
+ *
+ * Step C0 C1
+ *    1  0  1
+ *    2  1  1
+ *    3  1  0
+ *    4  0  0
+ *
+ * The circuits can be found at
+ *
+ * http://www.arduino.cc/en/Tutorial/Stepper
+ */
+
+// ensure this library description is only included once
+#ifndef Stepper_h
+#define Stepper_h
+
+// library interface description
+class Stepper {
+  public:
+    // constructors:
+    Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2);
+    Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2,
+                                 int motor_pin_3, int motor_pin_4);
+    Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2,
+                                 int motor_pin_3, int motor_pin_4,
+                                 int motor_pin_5);
+
+    // speed setter method:
+    void setSpeed(long whatSpeed);
+
+    // mover method:
+    void step(int number_of_steps);
+
+    int version(void);
+
+  private:
+    void stepMotor(int this_step);
+
+    int direction;            // Direction of rotation
+    unsigned long step_delay; // delay between steps, in ms, based on speed
+    int number_of_steps;      // total number of steps this motor can take
+    int pin_count;            // how many pins are in use.
+    int step_number;          // which step the motor is on
+
+    // motor pin numbers:
+    int motor_pin_1;
+    int motor_pin_2;
+    int motor_pin_3;
+    int motor_pin_4;
+    int motor_pin_5;          // Only 5 phase motor
+
+    unsigned long last_step_time; // time stamp in us of when the last step was taken
+};
+
+#endif
+