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Introduction RS-232 and RS-485 are two types of standard serial communication protocols. Both are used to facilitate serial communication between devices; however, they differ in many ways. RS-232 RS-232, also known as RS-232C, is a widely implemented serial transmission interface…

Introduction MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol that provides resource-constrained network clients with a simple way to distribute telemetry information. The protocol, which uses a publish/subscribe communication pattern, is used for machine-to-machine (M2M) communication and plays…

In today’s trend of Internet intelligence, different communication protocols play different roles. Among them, MQTT protocol and HTTP protocol are two common communication protocols, and they are suitable for different scenarios. This article will compare and analyze them in detail. MQTT protocol…