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Arduino Mega 2560 RFID Access Control System with GSM Notification

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Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface various components with an Arduino Mega 2560 microcontroller. The circuit includes input devices, output devices, and communication modules, which are interconnected through a series of electrical nets. The primary components include a buzzer, an LCD I2C display, an RFID-RC522 module, an SG90 servo motor, a 4x4 membrane matrix keypad, resistors, LEDs, and a SIM900A GSM module. The Arduino Mega 2560 serves as the central processing unit, controlling the various peripherals through its GPIO pins.

Component List

Buzzer

LCD I2C Display

RFID-RC522

SG90 Servo Motor

4X4 Membrane Matrix Keypad

Resistors (221 Ohms)

LEDs (Red, Green, Blue)

Arduino Mega 2560

SIM900A GSM Module

Wiring Details

Buzzer

LCD I2C Display

RFID-RC522

SG90 Servo Motor

4X4 Membrane Matrix Keypad

Resistors (221 Ohms)

LEDs (Red, Green, Blue)

SIM900A GSM Module

Documented Code

Arduino Mega 2560 (Main Controller)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

4X4 Membrane Matrix Keypad (Placeholder Code)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

(Note: The code provided for the 4X4 Membrane Matrix Keypad is a placeholder and does not contain any functional code. It is expected that the user will implement the necessary code to handle keypad inputs.)