People Counter with IR Beam: Build an ESP32-S3 IoT Doorway Counter with Live Web Dashboard

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

Create a doorway-mounted sensor system that silently counts every person passing through and instantly sends the number to a dashboard you can open on any phone or laptop. Use it to track footfall in your school lab, see how many visitors a makerspace gets during an open day, or prototype a crowd-aware lighting control—the same optical break-beam principle runs automatic doors and traffic counters across India.

What You'll Build

You’ll assemble an infrared break-beam pair on a breadboard, wire the LM393 comparator to clean the sensor signal, and program the ESP32‑S3 to host its own WiFi web server. When someone walks through the beam, the live count updates automatically on the dashboard—and also on the included 0.96‑inch OLED screen, so you can see the number locally even without a browser.

What You'll Learn

• How IR LEDs and photodiodes detect beam interruption and produce a threshold-crossing voltage
• Using an LM393 comparator to convert an analog sensor signal into a clean digital pulse
• Programming an ESP32‑S3 in Arduino IDE to run a WiFi access point and serve a web dashboard
• Designing a simple HTML/CSS interface that polls the device and displays the real-time count

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students preparing a physics or computer science investigatory project, B.Tech ECE/EEE students prototyping an IoT occupancy counter for a mini-project, ATL Tinkering Lab coordinators introducing sensor-based automation, and Smart India Hackathon teams that need a ready-to-use hardware block for a live dashboard idea.

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.