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from pymeasure.instruments import Instrument
from pymeasure.instruments.validators import strict_discrete_set, strict_range
from pymeasure.adapters import VISAAdapter

class Fluke7341(Instrument):
    """ Represents the compact constant temperature bath from Fluke
    """

    set_point = Instrument.control("s", "s=%g",
                                   """ A `float` property to set the bath temperature set-point. 
                                   Valid values are  in the range –40 to 150 °C.
                                   The unit is as defined in property :attr:`~.unit`. This property can be read
                                   """,
                                   validator=strict_range,
                                   values = (-40, 150),
                                   )
    
    unit = Instrument.control("u", "u=%s",
                              """ A string property that controls the temperature
                              unit. Possible values are `c` for Celsius and `f` for Fahrenheit`.""",
                              validator=strict_discrete_set,
                              values = ('c','f'),
                              )
    
    temperature = Instrument.measurement("t",
                                         """ Read the current bath temperature.
                                         The unit is as defined in property :attr:`unit`.""",
                                         )

    id = Instrument.measurement("*ver",
                                """ Read the instrument model """,
                                preprocess_reply=lambda x: x,
                                get_process=lambda x: "Fluke,{},NA,{}".format(x[0][4:], x[1])
                                )

    def __init__(self, resource_name, **kwargs):
        super().__init__(
            resource_name,
            "Fluke 7341",
            timeout=2000,
            write_termination='\r\n',
            preprocess_reply=lambda x: x.split()[1],
            includeSCPI=False,
            **kwargs
        )

        if isinstance(self.adapter, VISAAdapter):
            self.adapter.connection.baud_rate = 2400
