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libmodbus

Portable library for Modbus protocol communication over serial and TCP

brewmacoslinux

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Portable modbus library

Examples

read modbus registers from a device$ libmodbus provides C library functions; use in code: modbus_read_registers(mb, addr, nb, dest)

write values to modbus device registers$ libmodbus provides C library functions; use in code: modbus_write_registers(mb, addr, nb, src)

connect to modbus device over TCP network$ libmodbus provides C library functions; use in code: modbus_new_tcp(ip, port) then modbus_connect(mb)

communicate with modbus device over serial port

$ libmodbus provides C library functions; use in code: modbus_new_rtu(device, baud, parity, bits, stops) then modbus_connect(mb)

build industrial automation application with modbus protocol$ libmodbus provides C library; link with -lmodbus and include <modbus/modbus.h> in your application