Modbus rtu vs tcp
#MODBUS RTU VS TCP SERIAL#
The serial server strips off the Ethernet section, and forwards the Modbus RTU message on to the serial port/s. This would certainly work on a Raspberry Pi, and possibly also on Arduino, depending on how large you want your queue to be. Modbus RTU over TCP/IP is typically used by serial servers where you can have an Modbus Ethernet client communicating with multiple Modbus RTU-RS485 slaves, by way of a serial server.
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#MODBUS RTU VS TCP CODE#
The actual Modbus protocol data unit (PDU), merely containing the Modbus function code and data, is embedded in an application data unit (ADU) so the request reaches the correct device free of communication errors. While it's certainly possible to build a Modbus TCP/RTU gateway, you won't be able to do it with a simple nc command, for two reasons: