设计说明书
总字数：14000+
摘要
随着超市零售业的快速发展，对高效、精准的称重计价工具需求日益增长。传统的超市电子秤功能单一，仅能实现基本的称重与计价，且数据记录依赖人工，存在效率低、易出错、无法实时共享数据等问题，难以满足现代化超市的管理需求。
基于 STM32F103C8T6 单片机的智能超市电子秤，整合了 HX711 称重模块、矩阵键盘、OLED 显示屏、ESP8266 WiFi 模块及声光报警装置，实现了物品的精准称重、快速计价、数据显示及无线传输功能。系统核心功能包括：通过 HX711 模块检测物品重量，当重量大于 5KG 时触发声光报警；通过矩阵键盘输入物品单价，自动计算并显示总价；借助 OLED 显示屏同步展示单价、重量和总价信息；利用 ESP8266 WiFi 模块将测量数据发送至手机端，实现数据的实时共享与记录。
该系统的实现，有效提升了超市称重计价的效率与精准性，减少了人工操作误差，同时通过无线数据传输功能，为超市的库存管理、销售统计等提供了便捷的数据支持，为智能超市的信息化建设提供了有力保障，具有较高的实际应用价值。
关键词：STM32F103C8T6；智能超市；电子秤；HX711；无线传输；自动计价
ABSTRACT
With the rapid development of supermarket retail industry, there is an increasing demand for efficient and accurate weighing and pricing tools. Traditional supermarket electronic scales have single functions, only capable of basic weighing and pricing, and data recording relies on manual work, which has problems such as low efficiency, high error rate, and inability to share data in real-time, making it difficult to meet the management needs of modern supermarkets.
The intelligent supermarket electronic scale based on STM32F103C8T6 microcontroller integrates HX711 weighing module, matrix keyboard, OLED display, ESP8266 WiFi module and acousto-optic alarm device, realizing functions of accurate weighing, rapid pricing, data display and wireless transmission of items. The core functions of the system include: detecting the weight of items through HX711 module, triggering acousto-optic alarm when the weight is more than 5KG; inputting the unit price of items through matrix keyboard, automatically calculating and displaying the total price; synchronously displaying unit price, weight and total price through OLED display; sending measured data such as weight, unit price and total price to the mobile phone through ESP8266 WiFi module, realizing real-time sharing and recording of data.
The implementation of this system effectively improves the efficiency and accuracy of weighing and pricing in supermarkets, reduces manual operation errors, and at the same time, through the wireless data transmission function, provides convenient data support for supermarket inventory management, sales statistics, etc., and provides a strong guarantee for the information construction of intelligent supermarkets, with high practical application value.
Keywords: STM32F103C8T6; Intelligent supermarket; Electronic scale; HX711; Wireless transmission; Automatic pricing
目录
第 1 章 绪论
1.1 研究的目的及意义
1.2 国内外发展情况
1.3 本文主要研究内容
第2章 设计思路与方案论证
2.1 主要元器件选择
2.1.1 主控芯片选择
2.1.2 称重模块选择
2.1.3 键盘选择
2.1.4 显示模块选择
2.1.5 WiFi 模块选择
2.1.6 声光报警模块选择
2.2整体设计方案
第 3 章 硬件设计
3.1 主控电路模块
3.2 称重模块电路
3.3 矩阵键盘电路
3.4 显示模块电路
3.5 WiFi 模块电路
3.6 声光报警模块电路
第4章 系统程序设计
4.1 编程软件介绍
4.2 系统主流程设计
4.3 矩阵键盘子流程设计
4.4 OLED显示流程设计
4.5 WiFi模块子流程设计
4.6 称重模块子流程设计
第 5 章 仿真测试
5.1 整体仿真测试
5.2 称重模块功能测试
5.3 矩阵键盘功能测试
5.4 显示模块功能测试
5.5 WiFi 模块功能测试
第 6 章 实物测试
6.1 整体实物测试
6.2 称重模块功能测试
6.3 矩阵键盘功能测试
6.4 显示模块功能测试
6.5 WiFi 模块功能测试
第 7 章 总结与展望
7.1 总结
7.2 展望
致谢
参考文献
附录
附录一：原理图
附录二：PCB
附录三：主程序
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