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IoT home security prototype
IoT·Jan 1, 2023
IoT-Based Home Security
Wi-Fi-connected security node that monitors motion/door events and sends remote alerts.
Overview
This IoT security project monitors a room or entry point using motion and door sensors. An ESP-based controller connects to Wi-Fi and sends events to a remote dashboard or notification channel. It is a practical home-security base that can be expanded with camera, siren, and cloud logging.
Specifications
RoleIoT system developer
MicrocontrollerESP8266 / ESP32
SensorsPIR motion sensorMagnetic reed switch
ModulesWi-Fi moduleBuzzer/sirenStatus LED
ProtocolsWi-FiMQTTHTTPGPIO
Tech tagsESP8266Wi-FiPIR SensorDoor SensorMQTTHome Security
Architecture
Sensors report intrusion events to the MCU. The Wi-Fi node sends data to a remote service and can activate local alarm feedback.
Project photos
Implementation details
Firmware
Firmware reads sensors, debounces events, connects to Wi-Fi, posts alert messages, and can trigger local alarm outputs.
Power
Low-voltage DC supply powers the controller and sensors; battery backup can be added for security reliability.
Components / BOM
ESP8266/ESP32 board, PIR sensor, Reed switch, Buzzer/status LED, Power adapter
Engineering challenges
A reliable security node needs robust Wi-Fi reconnect behavior and false-trigger filtering.
Solutions
Implemented simple event handling, remote alert logic, and sensor debouncing.
Results & metrics
Prototype demonstrates IoT security alert workflow.
Future improvements
Add camera capture, battery backup, mobile push notifications, encrypted device provisioning, and multi-node dashboard.