Porting the MQTT protocol to STM32 and using the W5500 Ethernet chip to connect to Ali Cloud

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Porting the MQTT protocol to STM32 and using the W5500 Ethernet chip to connect to Ali Cloud Preface Topic Core code in conclusion Preface I am very happy to have the opportunity to do this project. I have learned a lot. But when I first started, I really started from scratch. The information I found on the Internet was very different. There were problems with many codes, and it was really useful to transplant the modules made by others one by one. Very troublesome, in order to prevent everyone who needs to do something like this Internet of Things project from going wrong, I try my best to…

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