Office Occupancy Tracker Kit v2: LoRa PIR Alarm System with Arduino Nano – 500m Range

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

Transform any office into a smart, motion-aware space without relying on Wi-Fi or the internet. This kit lets you deploy a single PIR sensor node that detects human presence and immediately relays an alarm over LoRa to a receiver stationed up to 500 meters away — across a campus, parking lot, or between buildings. It’s a self-contained, two‑unit wireless alert system that works reliably in open fields, giving you real‑time occupancy alerts at a security desk or remote monitoring point.

What You'll Build

You’ll assemble a transmitter unit with an Arduino Nano, RA-02 LoRa module, and an HC-SR501 PIR sensor that wakes instantly on motion. An adjacent receiver unit, built with its own Arduino and LoRa module, listens for the incoming packet and triggers a loud active buzzer the moment occupancy is detected. Place the receiver anywhere within a 500m open‑field radius, and you’ll get instant audio alerts without any cloud dependency or monthly fees — perfect for makeshift guard cabins, lab monitoring, or campus security setups.

What You'll Learn

• Interface HC-SR501 PIR sensors with Arduino Nano and calibrate sensitivity, delay, and trigger modes for office‑grade detection.
• Configure RA-02 LoRa modules for reliable packet transmission over 500m, including frequency settings, antenna placement, and signal strength optimisation.
• Design a wireless alarm loop: sensor‑trigger logic, LoRa packet encoding/decoding, and buzzer activation upon successful reception.
• Debug wireless communication issues such as packet loss, interference, and range limitations using RSSI indicators and simple network troubleshooting.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for intermediate‑level students and hobbyists who already have basic Arduino experience and want to explore long‑range wireless networking. It fits perfectly into CBSE Class 12 electronics practicals, B.Tech ECE/EEE communication labs, and Smart India Hackathon teams building remote monitoring solutions. ATL Tinkering Labs can use it to demonstrate campus‑wide sensor networks, while IIT/NIT/VIT/BITS engineering students will find it a solid foundation for LoRa‑based IoT projects.

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.