Client.py

import socket
import sys
import time

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QThread

from klient_gui import Ui_MainWindow


class MyForm(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # Pelen ekran
        # self.showFullScreen()
        self.showMaximized()
        self.timer = QtCore.QTimer(self)
        self.polaczenie = Polaczenie(self)
        self.polaczenie.start()
        #self.start_linczik(20)

    @QtCore.pyqtSlot()
    def updateLCD(self):
        # Update the lcd
        self.start_time -= 1
        if self.start_time >= 0:
            self.ui.lcdNumber.display("%d:%02d" % (self.start_time / 60, self.start_time % 60))
        else:
            self.timer.stop()

    @QtCore.pyqtSlot(int)
    def start_linczik(self, b):
        self.start_time = b
        self.ui.lcdNumber.display("%d:%02d" % (self.start_time / 60, self.start_time % 60))
        self.timer.start(1000)
        self.timer.timeout.connect(self.updateLCD)

class Polaczenie(QtCore.QThread):
    sig = QtCore.pyqtSignal(str,str)
    def __init__(self, parent):
        super(Polaczenie, self).__init__(parent)
        self.sig.connect(self.event_dispatcher)

    def run(self):
        server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        ip = "127.0.0.1"
        port = 1234
        adress = (ip, port)
        server.bind(adress)
        server.listen(1)

        while True:
            print("Start listenint on ", ip, " on ", port)
            (client, addr) = server.accept()
            print("Got connection from ", addr[0], ":", addr[1])
            data = client.recv(1024)
            data = data.decode()
            print("Recived ", data, " from the client")
            print("Processin data")
            indeks_srednik = data.index(";")
            instrukcja = data[:indeks_srednik]
            try:
                string = data[indeks_srednik+1:]
            except Exception as e:
                print(e)
            try:
                print(instrukcja)
                print(string)
                if instrukcja == "zamknij":
                    # Zamykanie aplikacji przy pomocy serwera
                    server.close()
                    sys.exit(0)
                elif instrukcja == "czas_set":
                    self.sig.emit("czas_set", string)
            except Exception as e:
                print(e)

    def event_dispatcher(self, a, b):
        # funkcja dispatchujaca eventy
        if a == "czas_set":
            print("licznik start")
            print(a)
            print(b)
            b=int(b)
            #MyForm().start_linczik(b)
            QtCore.QMetaObject.invokeMethod(self.parent(), "start_linczik", 
                QtCore.Qt.QueuedConnection,  QtCore.Q_ARG(int, b))


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    sys.exit(app.exec_())

klient_gui.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'klient_gui.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(284, 234)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.lcdNumber = QtWidgets.QLCDNumber(self.centralwidget)
        self.lcdNumber.setObjectName("lcdNumber")
        self.verticalLayout.addWidget(self.lcdNumber)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 284, 25))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Server.py

import socket
import sys
import time
import datetime

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QThread

from serwer_gui import Ui_MainWindow


class MyForm(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # Syglany i sloty
        self.ui.pushButtonKlientClose.clicked.connect(self.close_client)
        self.ui.pushButtonCzasStart.clicked.connect(self.start_count)

    def close_client(self):
        c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        c.connect(("127.0.0.1", 1234))
        c.send("zamknij;".encode())
        c.close()
        return

    def start_count(self):
        ilosc_minut = self.ui.spinBoxTime.value()
        print(ilosc_minut)
        c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        c.connect(("127.0.0.1", 1234))
        c.send(("czas_set;10").encode())
        c.close()


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    sys.exit(app.exec_())

serwer_gui.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(314, 257)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.pushButtonKlientClose = QtWidgets.QPushButton(self.centralwidget)
        self.pushButtonKlientClose.setObjectName("pushButtonKlientClose")
        self.verticalLayout.addWidget(self.pushButtonKlientClose)
        self.pushButtonCzasStart = QtWidgets.QPushButton(self.centralwidget)
        self.pushButtonCzasStart.setObjectName("pushButtonCzasStart")
        self.verticalLayout.addWidget(self.pushButtonCzasStart)
        self.spinBoxTime = QtWidgets.QSpinBox(self.centralwidget)
        self.spinBoxTime.setObjectName("spinBoxTime")
        self.verticalLayout.addWidget(self.spinBoxTime)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 314, 25))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButtonKlientClose.setText(_translate("MainWindow", "pushButtonKlientClose"))
        self.pushButtonCzasStart.setText(_translate("MainWindow", "pushButtonCzasStart"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())