modbus <=> motor_controller

Hello,

I am very pleased to have found your project to be very useful in my biological research.

I'm still trying to understand and master the project.

There seem to be many references to the instrument.modbus module which is no longer present. I found it on the github repo.

So my first report would be:

in

/doc/examples/drive_motor.py

we need to replace

from fluidlab.instruments.modbus.unidrive_sp import UnidriveSP

with

from fluidlab.instruments.motor_controller.unidrive_sp import UnidriveSP

this raises another error :

in instruments.motor_controller.unidrive_sp

we need to import Driver class

from fluidlab.instruments.drivers import Driver

Now i'm still stucked with an other error :

fluidlab/instruments/features.py", line 151, in __init__
    command_get = command_set + "?"
TypeError: unsupported operand type(s) for +: 'int' and 'str'

I hope I can figure out how to fix it and share it.