002-STM32+W5500 Basic Control (Alibaba Cloud IoT Platform)-STM32+W5500 uses MQTT+SSL (mbedtls) encryption to access Alibaba Cloud IoT platform
002-STM32+W5500 Basic Control (Alibaba Cloud IoT Platform)-STM32+W5500 uses MQTT+SSL (mbedtls) encryption to access Alibaba Cloud IoT platform
0
Components
Hardware components
WIZnet - W5500
x 1
STM32
x 1
Project description
instruction In network communication, if SSL is not added, the information is exposed in the network communication in clear text. This section transplants the mbedtls library to allow W5500 to connect to the MQTT server in SSL mode. First, briefly explain SSL, in fact, the whole is TCP and server communication, It's just that after the TCP connection to the server, the encryption method and encryption password are negotiated with the server first. Then the data is encrypted and transmitted; test 1. Open the code in this section 2. Modify it to your own Alibaba Cloud device information 3…
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