"Sensor Control" rev_01

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    - Project: "Sensor Control"
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-11-26 12:24:05

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* DESIGN & IMPLEMENT A SYSTEM TO ADDRESS ANY */
    /* CHALLENGE IN ANY FIELD OF APPLICATION. THE SYSTEM */
    /* SHOULD INCLUDE AN LCD, A BLUETOOTH MODULE, TWO */
    /* SENSORS & TWO ACTUATORS WITH ONE OF THE SENSORS & */
    /* ACTUATORS BEING MODELLED. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <LiquidCrystal.h> // Library for LCD
#include <SoftwareSerial.h> // Library for Bluetooth communication
#include <DHT.h> // Library for DHT sensor
#include <Servo.h> // Library for Servo motor

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/****** GLOBAL VARIABLES *****/
// LCD pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // RS, E, D4, D5, D6, D7

// Bluetooth pins
SoftwareSerial bluetooth(10, 9); // RX, TX

// DHT sensor
#define DHTPIN 7 // Pin where the DHT sensor is connected
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE);

// Servo motor
Servo myServo; // Create a servo object

/****** SETUP FUNCTION *****/
void setup(void)
{
    // Initialize the LCD
    lcd.begin(16, 2); // Set up the LCD's number of columns and rows
    lcd.print("Initializing...");

    // Initialize Bluetooth
    bluetooth.begin(9600); // Set the baud rate for Bluetooth

    // Initialize DHT sensor
    dht.begin();

    // Attach the servo to pin 8
    myServo.attach(8);
}

/****** LOOP FUNCTION *****/
void loop(void)
{
    // Read temperature and humidity from DHT sensor
    float h = dht.readHumidity();
    float t = dht.readTemperature();

    // Check if any reads failed and exit early (to try again).
    if (isnan(h) || isnan(t)) {
        lcd.print("Failed to read");
        return;
    }

    // Display temperature and humidity on LCD
    lcd.clear();
    lcd.print("T:");
    lcd.print(t);
    lcd.print("C H:");
    lcd.print(h);
    lcd.print("%");

    // Control the servo based on Bluetooth input
    if (bluetooth.available()) {
        char command = bluetooth.read();
        if (command == '1') {
            myServo.write(90); // Move servo to 90 degrees
        } else if (command == '0') {
            myServo.write(0); // Move servo to 0 degrees
        }
    }

    delay(2000); // Wait for 2 seconds before the next loop
}

/* END CODE */