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A smart burglar alarm integrates motion sensors, door/window sensors, and AI camera detection to send instant LINE alerts, with multi-zone configuration via Home Assistant — fully local, no external cloud required.

Design a cellular backup communicator for smart security using 4G LTE (SIM7600) and GSM (SIM800L) modules to deliver SMS/call alerts when fibre internet or Wi-Fi fails — ensuring 99.9% uptime even if an intruder cuts the line.

A detailed comparison of PIR, Microwave, and Dual-Technology motion sensors for smart home security — with false alarm reduction principles including pet immunity, temperature compensation, and ML-based anomaly detection for Thailand.