def METHOD_NAME(self, cmd):
    cmd += '\r\n'
    self.ser.write(cmd)
    time.sleep(0.3)
    rem_char = self.ser.inWaiting()
    value = self.ser.read(rem_char)
    value = value.replace('\xffR','',)
    value = value.replace('+','')
    value = value.replace('\r','')
    return value