Entry Widget issue

[PA3040]

Hi Team
My requirement is read data from arduino through serial port
and put it to the Entry widget

Every this is successful but only issue is The Entry Widget does not open but I can oen it with combine plot widget

Please advice to open Entry widget without plot widget

import serial
from tkinter import *
import matplotlib.pyplot as plt
from drawnow import *

values = []
root = Tk()

plt.ion()
cnt=0

#serialArduino = serial.Serial('/dev/ttyACM0', 19200)
serialArduino = serial.Serial('COM3',baudrate = 9600, timeout = 1)
root.title("D Cube Serial Read")
e = Entry(root,width = 35, borderwidth = 5)
e.grid(row = 0, column = 0, columnspan = 3,padx = 10,pady = 10)
def plotValues():
    plt.title('Serial value from Arduino')
    plt.grid(True)
    plt.ylabel('Values')
    plt.plot(values, 'rx-', label='values')
    plt.legend(loc='upper right')

#pre-load dummy data
for i in range(0,26):
    values.append(0)
    
while True:
    while (serialArduino.inWaiting()==0):
        pass
    valueRead = serialArduino.readline()
    print(valueRead)

    #check if valid value can be casted
    try:
        valueInInt = int(valueRead)
        print(valueInInt)
        
        if valueInInt <= 1024:
            if valueInInt >= 0:
                e.delete(0,END)
                e.insert(1,valueInInt)
                values.append(valueInInt)
                values.pop(0)
                drawnow(plotValues)
                
            else:
                print ("Invalid! negative number")
        else:
            print ("Invalid! too large")
    except ValueError:
        print ("Invalid! cannot cast")

Thanks in advanced