Pet ownership is increasingly common in modern households, yet maintaining a consistent feeding schedule remains challenging for the owners particularly those who live in cities and have busy lifestyles. This paper presents the design, development, and validation of a low-cost, scalable GSM-IoT smart pet feeder that enables remote monitoring and control through cellular communication. The device combines with an Arduino microcontroller, a SIM800L GSM module for communication, an ultrasonic sensor for real-time food-level assessment, and a servo mechanism for accurate portion dispensing. A dedicated mobile application was developed using MIT App Inventor which allows owners to send feeding commands and receive real-time status updates. Experimental results demonstrate a 98\% SMS command success rate, consistent portion dispensing with $\pm 2.67$\% variance, and reliable autonomous operation. Its modular, energy-efficient design makes it easy to use in a wide range of households, including those with limited resources. This work pushes forward the field of accessible pet care technology by providing a practical, scalable, and completely internet-independent solution for personalized pet feeding. In doing so, it sets a new benchmark for low-cost, GSM-powered automation in smart pet products.

翻译：在现代家庭中，宠物饲养日益普遍，但维持规律的喂食计划对宠物主人而言仍具挑战性，尤其对于居住在城市且生活方式繁忙的人群。本文介绍了一种低成本、可扩展的GSM-IoT智能宠物喂食器的设计、开发与验证，该设备通过蜂窝通信实现远程监控与控制。系统采用Arduino微控制器作为核心，集成SIM800L GSM模块进行通信，利用超声波传感器实时监测食量，并通过伺服机构实现精确分食。基于MIT App Inventor开发的专用移动应用程序允许主人发送喂食指令并接收实时状态更新。实验结果表明：短信指令成功率可达98%，分食一致性误差为$\pm 2.67$%，且自主运行稳定可靠。其模块化、高能效的设计使其易于在各类家庭中部署，包括资源有限的环境。本研究通过提供一种实用、可扩展且完全独立于互联网的个性化宠物喂食方案，推动了普惠型宠物护理技术的发展，从而为基于GSM的低成本智能宠物产品自动化设立了新标杆。