Simple server for translating Modbus RTU (over serial line) to Modbus TCP and vice versa.

Requirements:
libmodbus ver. 2.9.3, tested 3.0.1

Compilation:
gcc -Wall -I/usr/include/modbus -o mrtu2mtcp mrtu2mtcp.c -lmodbus -lrt

Usage:
$ ./mrtu2mtcp -h
Usage: ./mrtu2mtcp [options]
Possible options:
-s rtu_slave_address (default 1)
-S usb_device (default /dev/ttyUSB0)
-b baudrate (default 9600)
-y parity posible values: N,E,O (default E)
-n number_of_transport_bits (default 8)
-B number_of_stop_bits (default 1)
-A ip_address to bind (default 127.0.0.1)
-p port to bind (default 1502)
-v be verbose if present
-l log_file (NOT IMPLEMENTED)
-d demonize if present (NOT IMPLEMENTED)

Example:
mrtu2mtcp -S /dev/ttyR1 -A 0.0.0.0 -p 502 -v

Have fun!