class ReadOptionFuncMessage(object):
    def __init__(self):
        self.payload = Payload(None, True)
        self.payload.set_query()
        self.payload.set_command('=')
        self.frame = Frame(self.payload)
        self.message = Message()
        self.message.add_frame(self.frame)

    def get_message(self):
        return self.message

    def __str__(self):
        return "ReadOptions"
class ReadMeasMessage(object):
    def __init__(self):
        self.payload = Payload(None, True)
        self.payload.set_query()
        self.payload.set_command('D')
        self.frame = Frame(self.payload)
        self.message = Message()
        self.message.add_frame(self.frame)
        self.message.finish()

    def get_message(self):
        return self.message

    def __str__(self):
        return "ReadMeasurement"