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 ...
The module can be used without a gateway to provide information. With integrated digital input and RS-485 in the same module, it provides a flexible combination of I/O to acquire digital signal and ...
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