The bridge listens on a configurable TCP port (default: 502) and expects standard Modbus TCP frames from clients. Each request is translated into a Modbus RTU frame, transmitted over UART, and the ...
23IO Modbus RTU Python Library for eletechsup PNP and NPN relay modules. Specification for RS485 comms can be found here https://485io.com/eletechsup/23IOA08_23IOB16 ...