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DIY alarm systems, sensors and home security setups that work without monthly fees.
Motion sensors are the active layer of a DIY home security system — they detect intruders who get past your perimeter sensors, trigger lighting automations, and provide presence information for dozens of other automations. These are the best Zigbee motion sensors for Home Assistant in 2026. What to Look For Detection range and angle: Wider … Read more
Door and window contact sensors are the foundation of any DIY home security system. These small, battery-powered devices alert you instantly when a door or window opens — and at $5–15 each, you can cover every entry point in your home for a fraction of the cost of a professional system. Here are the best … Read more
Professional monitoring services charge $20–50 per month — $240–600 per year — for someone to call the police when your alarm triggers. With Home Assistant and a handful of Zigbee sensors, you can build a smart alarm system that sends you an immediate phone notification, sounds a local siren, and optionally shares a video clip … Read more