Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...

In the previous post, I showed an easy way to control this relay unit via M5Stack Atom Lite using one of the tailor-made codes. In this post, I take the opportunity to document its teardown and figure ...