FMCW (Frequency Modulated Continuous Wave) Frequency Application for Human Presence Detection as a Home Security System
Aplikasi Frekuensi FMCW (Frequency Modulated Continuous Wave) Untuk Deteksi Keberadaan Manusia Sebagai Home Security System
DOI:
https://doi.org/10.21070/ups.8387Keywords:
HLK-LD2450, ESP32, Bot telegram, FMCW Radar, Human Detection, Home SecurityAbstract
This research develops a home security system using FMCW (Frequency Modulated Continuous Wave) radar technology with the HLK-LD2450 sensor to detect human presence accurately. The system addresses limitations of conventional devices like CCTV and PIR sensors, which perform poorly in dark, obstructed, or extreme environments. FMCW radar detects presence and speed by comparing transmitted and reflected signal frequencies. The HLK-LD2450 sensor operates at 24 GHz, with a 6-meter detection range and ±60° coverage angle. The system integrates the sensor, an ESP32 microcontroller for data processing, a buzzer for local alarms, and a Telegram bot for real-time alerts. Testing was conducted in a controlled indoor space with human subjects to reduce interference. Results demonstrate high detection accuracy and fast response time. This makes the system a reliable and effective home security solution, capable of operating in various environmental conditions while offering real-time notifications to users.
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