elta.py

import serial


class EltaControl:
    def __init__(self, port="/dev/ttyUSB0"):
        self.port = port
        self.elta = serial.Serial(port=self.port, baudrate=19200, timeout=1)

    def __del__(self):
        self.elta.close()

    def __command(self, command):
        self.elta.write(bytes(command, 'utf-8') + b"\r\n")
        return self.elta.readline().decode('utf-8').strip()

    def boot(self):
        self.__command("\r\n\r\n\r\n")

    def shutdown(self):
        self.__command("SEO")

    def read_angle(self):
        zeile = self.__command("FW1")
        hz, v = None, None
        try:
            hz_str = zeile.split("Hz")[1].split("gon")[0]
            v_str = zeile.split("V")[1].split("gon")[0]
            hz = float(hz_str.strip("| :"))
            v = float(v_str.strip("| :"))
        except (IndexError, ValueError):
            print(f"Fehler beim Parsen der Antwort: '{zeile}'")
            pass

        return hz, v

    def go_to(self, hz=None, v=None):
        if hz is not None:
            self.__command(f"!Khz   |                       {hz:>9,.5f} gon ")
        if v is not None:
            self.__command(f"!Kv1   |                       {v:>9,.5f} gon ")
        if hz is not None or v is not None:
            self.__command("FAC")

    def add_hz(self, hz):
        current_hz, _ = self.read_angle()
        self.go_to(hz=current_hz + hz)

    def add_v(self, v):
        _, current_v = self.read_angle()
        self.go_to(v=current_v + v)