import serial


class B7_78():

    def __init__(self, folder):
        self.folder = folder
        self.instr = serial.Serial(
            self.folder, timeout=1, inter_byte_timeout=1)
        self.instr.write(b'SYST:REM\n')
        self.instr.write(b'SYST:REM\n')

    def getCurrentDC(self):
        self.instr.write(b'MEAS:CURR:DC?\n')
        return self.instr.read(100).decode().rstrip()

    def getVoltageDC(self):
        self.instr.write(b'MEAS:VOLT:DC?\n')
        return float(self.instr.read(100).decode().rstrip())

    def getCurrentAC(self):
        self.instr.write(b'MEAS:CURR:AC?\n')
        return float(self.instr.read(100).decode().rstrip())

    def getVoltageAC(self):
        self.instr.write(b'MEAS:VOLT:AC?\n')
        return float(self.instr.read(100).decode().rstrip())

# for i in range(5):
#     print(B7_78('/dev/ttyUSB0').getCurrentDC())