mbpoll uses libmodbus (http://libmodbus.org/).
Although the syntax of these options is very close modpoll proconX program,
it is a completely independent project.

mbpoll can:
- read discrete inputs
- read and write binary outputs (coil)
- read input registers
- read and write output registers (holding register)

The reading and writing registers may be in decimal, hexadecimal or
floating single precision.