Security System

The Security System project is a simple yet useful real-life scenario application. It uses a Ultrasonic Distance Sensor Module, the Buzzer Module and the RGB LED Module to work like a geniune security system. The system is designed to be activated when there is a movement in designated area.

About Tools and Materials:

SMD Red (Purchase Here)

SMD USB Gateway (Purchase Here)

Arduino Gateway Module (Purchase Here)

Ultrasonic Distance Sensor Module (Purchase Here)

Buzzer Module (Purchase Here)

RGB LED Module (Purchase Here)

Step 1: Hardware & Software Overview

Project Key Components

1. SMD

   The SMD acts as a bridge between the script and the modules. It is responsible for interpreting the commands sent by the script and translating them into actions that read input from the Ultrasonic Distance Sensor Module and actuate the visual and audible warning signals.

2. Ultrasonic Distance Sensor Module

   The Ultrasonic Distance Sensor Module measures the distance between the sensor and an object in its path. It provides distance data to the script for security monitoring.

3. Buzzer Module

   The Buzzer Module serves as the audible warning. It emits sound when activated when there is an object in the designated area.

4. RGB LED Module

   The RGB LED Module is used to provide visual warning. It can emit different colors and light intensities as programmed.

5. SMD Libraries

   The SMD library is at the heart of the application. It communicates with the SMD using a specific communication protocol, sending commands to read the Ultrasonic Distance Sensor Module and actuate the visual and audible warnings, the RGB LED Module and the Buzzer Module.

Project Key Features

• Distance-based Security Monitoring

  The Security System continuously monitors the distance measured by the Ultrasonic Distance Sensor Module. If the distance of the detected object is equal or closer than the determined distance value, the alert system will be activated.

• Visual Feedback with the RGB LED Module

  The RGB LED Module displays red and blue lights to indicate the security status. Red lights may represent an alert or danger, while blue lights indicate a normal or safe condition.

• Audible Feedback with the Buzzer Module

  The Buzzer Module emits a sound when the system detects a potential security threat, providing an audible alert to draw attention to the situation.

Step 2: Assemble

Getting Started

1. Hardware Setup

   • Connect the SMD to the PC or Arduino board using USB Gateway Module or Arduino Gateway Module.

   • Connect the Ultrasonic Distance Sensor Module, the Buzzer Module and the RGB LED Module to the SMD using an RJ-45 cable.

   • Make sure that the SMD is powered and all connections are correct.

Project Wiring Diagram

Step 3: Run & Test

1. Run the Application

   • Execute the script, initiating the Security System application.

   • Observe the RGB LED Module displaying colors and the Buzzer Module emitting sound based on the detected distance.

2. Customize Security Thresholds

   • Adjust the predetermined distance threshold in the script to customize the security monitoring levels.

   • Experiment with different colors and sound patterns for the LED and buzzer to suit specific security scenarios.

Project Codes

Python Code

from serial.tools.list_ports import comports
from platform import system
from smd.red import *
import time

baudrate = 115200          # Baud rate of communication
ID = 0                     # ID of the SMD
buzzer_module_id = 5       # ID of the buzzer module
distance_sensor_id = 1     # ID of the ultrasonic distance sensor module
rgb_led_id = 5             # ID of the RGB LED module


def USB_Port():
    """
    Scans and identifies a compatible USB port for the current operating system.

    Returns:
        str: The detected USB port or None if no suitable port is found.
    """
    # Get a list of available ports
    ports = list(comports())
    
    # Known USB port names for different operating systems
    usb_names = {
        "Windows": ["USB Serial Port"],  # Names specific to Windows
        "Linux": ["/dev/ttyUSB"],        # Names specific to Linux
        "Darwin": [                      # Names specific to macOS
            "/dev/tty.usbserial",
            "/dev/tty.usbmodem",
            "/dev/tty.SLAB_USBtoUART",
            "/dev/tty.wchusbserial",
            "/dev/cu.usbserial",
        ]
    }

    # Detect the operating system
    os_name = system()
    print(f"Operating System: {os_name}")

    if ports:
        for port in ports:
            # Check if the port matches any known USB names
            if any(name in port.device or name in port.description for name in usb_names.get(os_name, [])):
                print(f"USB device detected on port: {port.device}")
                return port.device  # Return the first matching port
        # If no suitable port is found, print the list of available ports
        print("No suitable USB device found. Available ports:")
        for port in ports:
            print(f"Port: {port.device}, Description: {port.description}, HWID: {port.hwid}")
    else:
        print("No ports detected!")
    return None


try:
    # Find and initialize the USB port
    SerialPort = USB_Port()
    if not SerialPort:
        raise Exception("No compatible USB port found. Please check your connection.")

    # Initialize the SMD module
    master = Master(SerialPort, baudrate)       # Defines the USB gateway module
    master.attach(Red(ID))                      # Gives access to the SMD of specified ID
    master.scan_modules(ID)                     # Scans and identifies the modules connected to the SMD

    # Main loop
    while True:
        # Get distance data from the ultrasonic sensor
        distance = master.get_distance(ID, distance_sensor_id)  # Variable to store the distance data
        print(f"Distance: {distance} cm")                      # Print the value to observe

        if distance is not None:
            if distance < 15:
                # Activate the buzzer and set RGB LED to red
                master.set_buzzer(ID, buzzer_module_id, 600)          # Set buzzer frequency to 600 Hz
                master.set_rgb(ID, rgb_led_id, red=255, green=0, blue=0)  # Set LED to red
                time.sleep(0.5)                                       # Wait for half a second
                master.set_rgb(ID, rgb_led_id, red=0, green=0, blue=255)  # Change LED to blue
            else:
                # Deactivate the buzzer and turn off the RGB LED
                master.set_buzzer(ID, buzzer_module_id, 0)            # Turn off the buzzer
                master.set_rgb(ID, rgb_led_id, red=0, green=0, blue=0)  # Turn off the LED

        time.sleep(0.1)  # Delay for smooth operation

except Exception as e:
    print(f"Error: {e}")

Arduino Code

#include <Acrome-SMD.h>

// Definitions
#define ID 0                   // ID of the SMD
#define BAUDRATE 115200         // Baud rate of communication
#define BUZZER_MODULE_ID 5      // ID of the buzzer module
#define DISTANCE_SENSOR_ID 1    // ID of the ultrasonic distance sensor module
#define RGB_LED_ID 5            // ID of the RGB LED module

Red master(ID, Serial, BAUDRATE);  // Defines the USB gateway module

void setup() {
    Serial.begin(BAUDRATE);  // Initialize serial communication
    master.begin();          // Start communication with the SMD
    master.scanModules();    // Scan and identify connected modules
}

void loop() {
    // Get distance data from the ultrasonic sensor
    int distance = master.getDistance(DISTANCE_SENSOR_ID);
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");

    if (distance > 0) {  // If a valid distance value is received
        if (distance < 15) {
            // Activate the buzzer and set RGB LED to red
            master.setBuzzer(BUZZER_MODULE_ID, 600);  // Set buzzer frequency to 600 Hz
            master.setRGB(RGB_LED_ID, 255, 0, 0);     // Set LED to red
            delay(500);  // Wait for half a second
            master.setRGB(RGB_LED_ID, 0, 0, 255);     // Change LED to blue
        } else {
            // Deactivate the buzzer and turn off the RGB LED
            master.setBuzzer(BUZZER_MODULE_ID, 0);
            master.setRGB(RGB_LED_ID, 0, 0, 0);
        }
    }

    delay(100);  // Delay for smooth operation
}