<![CDATA[The development of Internet of Things (IoT) technology has encouraged the implementation of smart home systems to improve safety and convenience in daily life, including infant monitoring. Parents' limited ability to continuously supervise their babies creates the need for a system capable of real-time monitoring and providing notifications whenever conditions requiring immediate attention are detected. This study aims to design and develop an Internet of Things (IoT)-based Smart Home Baby Monitoring system that can monitor both infant activities and environmental conditions in real time. The research employed the Rapid Application Development (RAD) method, which consists of the stages of requirement planning, design workshop, construction, and implementation. The proposed system utilizes an ESP32 as the main server and two Wemos D1 Mini boards as sensor nodes integrating a PIR HC-SR501 motion sensor, KY-037 sound sensor, DHT11 temperature sensor, and MQ-2 smoke sensor. Sensor data are transmitted via a Wi-Fi network to the ESP32, which subsequently forwards the data to an MQTT Broker using the MQTT protocol and sends notifications to users through a Telegram Bot. The experimental results demonstrate that all sensors functioned according to the system design, MQTT-based data communication operated reliably, and the Telegram Bot successfully delivered real-time notifications when motion, sound, smoke, or temperature changes were detected. Therefore, the proposed system effectively assists parents in remotely monitoring their infants while supporting the implementation of Internet of Things-based smart home technology.]]>
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