<![CDATA[The primary challenge motivating this research is pet owners' difficulty in consistently feeding pets while away from home. This study aims to design an Internet of Things (IoT)-based Smart Pet Feeder (SPF) that emphasizes real-time food level monitoring, utilizing repurposed plastic bottles as food containers. The system employs a Raspberry Pi 3 Model B, an HC-SR04 ultrasonic sensor to detect food levels, and an MG995 servo motor to dispense food. Developed in Python, three automated main engines synchronize data with a MySQL database. Validation involved Black-box testing and quantitative evaluations of sensor accuracy and feed output consistency. Results show the system passed Black-box testing with a 100% functional success rate. The ultrasonic sensor achieved 95.83% accuracy (4.17% average error). Food output averaged a consistent 25 grams per servo cycle. Using a 1.5-liter plastic bottle proved effective, economical, and eco-friendly. In conclusion, the system successfully enables accurate remote monitoring and feeding via the internet.]]>
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