Fieldbus# Modbus# http://pymodbus.readthedocs.io/ https://github.com/bashwork/pymodbus http://pythonhosted.org/pymodbus/ https://github.com/HynekPetrak https://github.com/patrickfuller https://pypi.python.org/pypi/pymodbus3 http://uzumaxy.github.io/pymodbus3/ https://github.com/uzumaxy/pymodbus3 http://numat-tech.com/ https://github.com/numat M-Bus# https://en.wikipedia.org/wiki/Meter-Bus http://www.m-bus.com/ http://www.rscada.se/libmbus/ https://github.com/rscada/libmbus/ https://github.com/rscada/python-mbus