ESP32 GSM SMS Alert System Kit: Build an Intruder Detector with Instant SMS Alerts

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine a home security system that doesn't just sound an alarm — it texts you the moment motion is detected. With this ESP32 GSM kit, you'll build a working SMS alert system that integrates a PIR motion sensor with the SIM800L GSM module, programming the ESP32 to send instant notifications to your phone. Perfect for a CBSE class 12 electronics project or a B.Tech mini-project, this kit turns a common security scenario into hands-on learning.

What You'll Build

You'll assemble a complete GSM-based alert system on a breadboard, upload the firmware to the ESP32, and test it by walking in front of the PIR sensor. The moment motion is detected, your phone receives an SMS with a pre-configured alert message. This is a functional prototype for home intrusion detection, demonstrating real-world GSM and IoT principles.

What You'll Learn

• Interfacing SIM800L GSM module with ESP32 using AT commands
• Reading PIR sensor digital output and triggering actions
• Providing clean, high-current 4V power to the SIM800L using a buck converter and capacitors
• Debugging serial communication and handling network registration

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This intermediate kit is designed for students and hobbyists who have some experience with Arduino or ESP32 and want to move into GSM-based IoT. It's ideal for CBSE Class 12 students working on their computer science or physics projects, B.Tech ECE/EEE/CS students preparing for mini-projects or the Smart India Hackathon, and ATL Tinkering Lab participants looking for a reliable, pre-tested hardware set. The SMS alert concept has direct applications in home security, farm field protection, and remote monitoring.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.