import serial
import time
import wx

serialInterface = serial.Serial('COM9', 9600)
 

class MyFrame(wx.Frame):    
    def __init__(self):
        super().__init__(parent=None, title='Pulse input')
        panel = wx.Panel(self)        
        my_sizer = wx.BoxSizer(wx.VERTICAL)        
        self.text_ctrl = wx.TextCtrl(panel)
        my_sizer.Add(self.text_ctrl, 0, wx.ALL | wx.EXPAND, 5)        
        my_btn = wx.Button(panel, label='Pulse')
        my_btn.Bind(wx.EVT_BUTTON, self.on_press)
        my_sizer.Add(my_btn, 0, wx.ALL | wx.CENTER, 5)        
        panel.SetSizer(my_sizer)        
        self.Show()

    def on_press(self, event):
        value = self.text_ctrl.GetValue()
        pulse_byte=value.encode("utf-8")
        serialInterface.write(pulse_byte)
    
            
if __name__ == '__main__':
    app = wx.App()
    frame = MyFrame()
    app.MainLoop()