Dfyjkt

At the moment I have to make a code that keeps reading the data from my COM port. But the moment I try to use read() it blocks the program, I've tried to use threads but when I make my thread target the read function it keeps on blocking.
So I added a return, the problem with this is that it will only return the value's it read when I press the button.

At this moment Lees() reads the data the moment I press the InsertText() button. I want Lees() to keep running in the background while I use my interface.

Interface:

 import sys
 from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QLineEdit
 import serial_se_re
 import threading

 serialPort = serial_se_re.SerialPort()

 def SendDataCommand():
 serialPort.Stuur("Basic Send")

 def Verbinden():
 serialPort.Open("COM13",19200)

 def InsertText():
 print(serialPort.Lees())
 #tekst_veld.insert(message)

 app = QApplication()
 window = QWidget()
 layout = QVBoxLayout()
 window.setWindowTitle('Python')

 thread = threading.Thread(target=serialPort.Lees())
 thread.start()

 connect_button = QPushButton('Connect')
 layout.addWidget(connect_button)
 connect_button.clicked.connect(lambda: Verbinden())

 stuur_data_button = QPushButton('Stuur message')
 layout.addWidget(stuur_data_button)
 stuur_data_button.clicked.connect(lambda: SendDataCommand())

 instert_text = QPushButton('add')
 layout.addWidget(instert_text)
 instert_text.clicked.connect(lambda: InsertText())

 tekst_veld = QLineEdit()
 layout.addWidget(tekst_veld)

 window.setLayout(layout)
 window.show()
 app.exec_()

SerialConnection:

import serial
import sys
import _thread
import threading

class SerialPort:
 def __init__(self):
 self.comportName = "COM13"
 self.baud = 19200
 self.isopen = False
 self.timeout = None
 self.serialport = serial.Serial()


 def __del__(self):
 try:
 if self.serialport.is_open():
 self.serialport.close()
 except:
 print("Kan de COM port niet sluiten, error: ", sys.exc_info()[0] )

 def CheckOpen(self):
 return self.isopen

 def Open(self,port,baud):
 if not self.isopen:
 self.serialport.port = port
 self.serialport.baudrate = baud
 try:
 self.serialport.open()
 self.isopen = True
 except:
 print("Kan port niet openen, error: ", sys.exc_info()[0])

 def Sluiten(self):
 if self.isopen:
 try:
 self.serialport.close()
 self.isopen = False
 except:
 print("Kan port niet sluiten, error: ", sys.exc_info()[0])

 def Stuur(self,message):
 if self.isopen:
 try:
 # Ensure that the end of the message has both r and n, not just one or the other
 newmessage = message.strip()
 newmessage += 'rn'
 self.serialport.write(newmessage.encode('utf-8'))
 except:
 print("Error sending message: ", sys.exc_info()[0] )
 else:
 return True
 else:
 return False

 def Lees(self):
 if self.isopen:
 try:
 while(1):
 message = self.serialport.read()
 return(message)
 except Exception:
 print("error")
 else:
 print("Cannot open serial port")