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 ...
System integrator RTUdirect replaced long runs of troublesome wiring to remote water treatment drip fields with wireless radios communicating from a base station to remote RTUs powered by solar panels ...
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