用廉价模块实现手机远程喂宠物，不依赖网络
Design and Development of a Low-Cost Scalable GSM-IoT Smart Pet Feeder with a Remote Mobile Application
- 用Arduino+SIM800L模块和超声波传感器实现远程控制
- 98%短信指令成功，投喂误差小于2.67%
- 适合预算有限或无网络环境的养宠人群
现代家庭宠物饲养日益普遍，但规律喂食对忙碌的城市居民仍具挑战。本文设计并验证了一款低成本、可扩展的GSM-IoT智能宠物喂食器，通过蜂窝通信实现远程监控与控制。设备采用Arduino微控制器、SIM800L GSM模块、超声波传感器实时检测粮量，配合伺服电机精准投喂。配套移动应用基于MIT App Inventor开发，支持发送喂食指令并接收实时状态。实验表明，短信指令成功率高达98%，投喂量偏差仅±2.67%，系统可稳定自主运行。其模块化、低功耗设计便于在各类家庭中部署，尤其适合资源有限的用户。该工作推动了可及性宠物护理技术发展，提供了一种完全脱离互联网的个性化喂养解决方案，为低成本GSM驱动的智能宠物产品树立了新标准。
原文摘要 · Abstract (English)
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.
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