Simulating smart elevator with Arduino uno in Proteus 

// By HomeMade Electronics // Subscribe to my channel ru-vid.com/show-UC8isJR_71x1wIfw6jB106pg // for more tutorial videos // like, share and leave a comment if you need help #include "HX711.h" // Get this library by clicking on Sketch > Include Library > Library Manager in the Arduino IDE and install it from there #include // Define calibration factor obtained using the SparkFun_HX711_Calibration sketch #define calibration_factor 18029.57 // Define pin numbers #define IN1 4 #define IN2 5 #define DOUT 3 #define CLK 2 #define Bstart 6 #define Bstop 7 #define Bstopage 1 float weight; // Variable to store weight measurement HX711 scale; LiquidCrystal lcd(13, 12, 11, 10, 9, 8); // Function to move motor forward void forward() { digitalWrite(IN1, HIGH); digitalWrite(IN2, LOW); } // Function to move motor backward void backward() { digitalWrite(IN1, LOW); digitalWrite(IN2, HIGH); } // Function to stop motor movement void stopage() { digitalWrite(IN1, LOW); digitalWrite(IN2, LOW); } void setup() { pinMode(IN1, OUTPUT); pinMode(IN2, OUTPUT); // Initialize LCD lcd.begin(16, 2); // Initialize button pins pinMode(Bstart, INPUT); pinMode(Bstop, INPUT); pinMode(Bstopage, INPUT); // Initialize load cell scale.begin(DOUT, CLK); scale.set_scale(calibration_factor); // Set the scale calibration factor scale.tare(); // Reset the scale to 0 assuming no weight on it at startup } void loop() { // Get weight measurement and display on LCD weight = scale.get_units() / 2; // Dividing by 2 to convert from grams to kilograms lcd.setCursor(0, 0); lcd.print("WEIGHT MEASURED"); lcd.setCursor(6, 1); lcd.print(weight, 1); lcd.print(" Kg"); // Check weight and control motor accordingly if (weight > 60) { stopage(); // If weight exceeds 60 Kg, stop the motor } else { if (digitalRead(Bstart) == LOW) { forward(); // If start button is pressed, move motor forward } } reverse(); // Check for reverse movement condition m_stopage(); // Check for stoppage condition } // Function to handle reverse movement of the motor void reverse() { if (digitalRead(Bstop) == LOW) { // If stop button is pressed if (weight > 60) stopage(); // Stop motor if weight exceeds 60 Kg else backward(); // Otherwise, move motor backward } } // Function to handle manual stoppage of the motor void m_stopage() { if (digitalRead(Bstopage) == LOW) // If stopage button is pressed stopage(); // Stop the motor }