from PyQt5.QtWidgets import *
import sys
import serial

# serial = serial.Serial("/dev/ttyACM0")
# serial.baudrate = 9600

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.iu()

    def iu(self):
        statusbar = QLabel("")
        btn1 = QPushButton("Write", self)
        btn2 = QPushButton("Cancel", self)
        btn3 = QPushButton("DataBase", self)
        timer = QLCDNumber(self)
        # timer.setDigitCount(4)
        timer.display(123)

        btn1.clicked.connect(self.writeClick)

        vbox = QVBoxLayout()
        vbox.addWidget(timer)

        hbox = QHBoxLayout()
        hbox.addWidget(statusbar)
        hbox.addStretch()
        hbox.addWidget(btn1)
        hbox.addWidget(btn2)
        hbox.addWidget(btn3)

        vbox.addLayout(hbox)

        self.setLayout(vbox)

        self.setGeometry(300, 300, 200, 200)
        self.show()
    def writeClick(self):


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Window()
    sys.exit(app.exec_())