Home security systems are generally composed of a number of devices, each with a unique set of capabilities. A door sensor will tell you when a door is opened, an occupancy sensor will tell you when someone enters a room, and an infrared camera can detect movement in the dark. So if you want a really smart security system, you will have to select all of the sensors you want and install them in just the right spots.<\/p>\n
An engineer who goes by the handle Magmabow approached smart home design from another angle by designing a single, tiny board that handles most security functions a person could want.<\/p>\n
The board is powered by a battery (\ud83d\udcf7: Magmabow)<\/p>\n
Rather than building a network of single-purpose devices, this compact system combines a wide array of sensors into a flexible, reconfigurable platform. At its core is an ESP32-S3 microcontroller, giving the device built-in wireless connectivity and enough processing power to manage multiple sensing modes simultaneously. The result is a modular security tool that can be deployed quickly and reassigned as needed.<\/p>\n
The board integrates an impressive collection of sensing hardware. A time-of-flight distance sensor enables precise proximity detection up to four meters, while a thermal infrared sensor can identify human presence based on body heat. A high-sensitivity light sensor adds another layer of awareness, capable of detecting changes such as lights being switched on, shadows passing, or cabinets opening. For physical interactions, both a Hall effect sensor and a reed switch allow the system to detect doors, windows, or even subtle magnetic movement through walls.<\/p>\n
Motion tracking is handled through a dual-accelerometer setup. A low-power three-axis accelerometer continuously monitors for anomalies, waking a more advanced nine-axis sensor only when needed. This staged approach helps conserve energy while still capturing detailed movement data when it matters. A temperature sensor rounds out the package, offering additional context for environmental monitoring or smart home integration.<\/p>\n
A closer look at the hardware (\ud83d\udcf7: Magmabow)<\/p>\n
Users can switch between eight different operating modes, ranging from proximity detection to ultra-low-power door monitoring. This flexibility makes it particularly useful for temporary installations, such as securing a home during travel or monitoring activity during renovations. Instead of purchasing and installing multiple devices, users can reposition and reconfigure a single unit in minutes.<\/p>\n
Alerts are delivered via a Discord webhook, providing a simple and cost-effective notification system. Additional hardware features \u2014 such as long-range wired communication support, extensive circuit protection, and flexible expansion connectors \u2014 make the board suitable for both home use and integration into larger security setups.<\/p>\n