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基于正点原子STM32F4开发板和阿里云物联网平台的MQTT项目

C 96.71% Assembly 0.44% CSS 0.08% C++ 0.58% Objective-C 2.17% Batchfile 0.01% CMake 0.02%

stm32f4_ucosii_lwip_mqtt's Introduction

说明

本项目基于正点原子STM32F4探索者开发板和阿里云平台的MQTT通信项目

使用

1.下载源码

2.修改mqtt_app.h文件中的阿里云设备三元数组

3.修改源码静态IP

4.编译后download到开发板

注意事项

1.务必自行在阿里云上创建物联网设备，并将相关三元参数填入mqtt_app.h文件中，否则功能无法正常演示

2.开发板网口需要用网线连入可上网的路由器，并修改源码中的静态IP参数，网段与路由器一致

3.开发板需要插入LCD显示屏，项目用的是4.3寸电阻屏

4.开发板需要接DS18B20温度传感器，用于上报环境温度

5.可用USB线接串口1，在串口终端上查看开发板运行状态

具体使用方式，可参考以下文章和视频

1.项目演示视频

https://www.bilibili.com/video/av52731912/

2.阿里云创建物联网设备教程

https://www.bilibili.com/video/av52731912/?p=2

3.MQTT协议简介

https://www.bilibili.com/video/av52731912/?p=3

4.基于github项目制作的MQTT点阵显示系统

https://www.bilibili.com/video/av52731912/?p=4

5.MQTT协议学习及调试利器——mqtt.fx

https://www.bilibili.com/video/av55897653/

6.个人博客

https://www.maxlicheng.com

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stm32f4_ucosii_lwip_mqtt's Issues

OSTimeGet() - curtick 溢出问题

您好，拜读了您的代码，感觉很有收获！
在 mqtt_app.c里面
如果我理解的正确，
OSTimeGet() 大概会在49天左右溢出？
这个时候，OSTimeGet() - curtick 的计算就会出问题？
请问这个如何解决呢？
感谢您的回复！

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