Assessfy Pvt. Ltd Beginner 5 milestones 100 marks

Home Security System with PIR Motion Sensor and GSM Alert

Target year: SE Sem 3-4 (Mini-Project-I) AICTE: 2 credits · ~50 hrs Bloom: Apply MU CBCS: ETC403 Mini-Project 1A/1B

Real-world project · AICTE-aligned · AI-graded · Audit-ready certificate

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About this project

Build a low-cost home intrusion alarm using a PIR motion sensor + GSM/SIM800L module that sends an SMS to the homeowner when motion is detected, with a 10-second cool-down to avoid flooding. Include a buzzer + LED indicator for local alert.

Course Learning Outcomes (CLOs):
CLO1: Apply microcontroller programming to interface real-world sensors.
CLO2: Design a small embedded system with multiple peripherals.
CLO3: Communicate with cellular network using AT command protocol.
CLO4: Build a working prototype with proper power management.

Industry/societal relevance: Indian home-security market growing fast — Godrej Security, CP Plus, Hikvision hire embedded engineers at this level.

Milestones

1. Circuit Design + BOM

15 marks 5d

Draw circuit on Fritzing, list components with prices from Robu/Visha. Submit BOM PDF + schematic.

2. PIR + Buzzer + LED Integration

20 marks 8d

Wire PIR to Arduino, write code to trigger buzzer + LED on motion. Add 10s debounce. Test in lab.

3. GSM SMS Module

25 marks 12d

Wire SIM800L, send a test SMS using AT commands. Integrate with motion-detect routine to send alert SMS.

4. LCD Status Display + Enclosure

20 marks 12d

16x2 LCD shows "Armed" / "Triggered" / "Cooldown". 3D-print or use a project box enclosure.

5. Demo + 4-page Report

20 marks 13d

Live demo: walk past sensor → buzzer + LED + SMS within 5s. Submit 4-page IEEE-format report + 3-min video.

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Skills you'll learn

Embedded CMicrocontroller programming (8051/AVR/Arduino)PIR sensor interfacingGSM AT commandsPower supply designPCB basics

Tools used

Arduino UNOPIR HC-SR501SIM800L GSM module16x2 LCDBuzzerEagle/KiCad (for PCB schematic)Multimeter

Prerequisites

Digital Electronics; Microprocessor Basics; intro C programming

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Home Security System with PIR Motion Sensor and GSM Alert

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