Remotely Led Control using Boltiot and Python

import tkinter
from tkinter import *
from boltiot import Bolt
import json

# Basic structure of the GUI

root = tkinter.Tk()
root.geometry("450x350+300+300")
root.resizable(0,0)
root.title("Led Control System")

# your devic info

API_key = "Your API key"
Device_ID = "Your Device Id"

mybolt = Bolt(API_key,Device_ID)

mybolt.digitalWrite('0','LOW')


def lightson():
   response=mybolt.isOnline()
   data=json.loads(response)
   if data["value"]=="online":
       mybolt.digitalWrite('0','HIGH')#0 is the gpio pin
   else:
       print("Your device is offline")


def lightsoff():
   res=mybolt.isOnline()
   data=json.loads(res)
   if data["value"]=="online":
       mybolt.digitalWrite('0','LOW')
   else:
       print("Your device is offline")


def Control():
    res=mybolt.isOnline()
    data=json.loads(res)
    v = area.get()
    if data["value"]=="online":
       mybolt.analogWrite('0', v)
    else:
       print("Your device is offline")

# python tkinter GUI design

lbl1 = Label (root, text = "Control The LED", anchor = N, font = ("roboto", 20, "bold underline"),fg = "blue")
lbl1.pack(expand = True, fill = "both",pady = "10px")

btn1 = Button (root, text = "Lights On",bd = 4, font = ("Vardana", 10, "bold"),bg = "#5dff5d", command=lightson)
btn1.pack()

btn2 = Button (root, text = "Lights Off",bd = 4, font = ("Vardana", 10, "bold"),bg = "#f12e51", command=lightsoff)
btn2.pack(pady = "20")

lbl2 = Label (root, text = "Control the brightness lever of the LED", font = ("Arial ", 16, "bold underline"),fg = "blue")
lbl2.pack(expand = True, fill = "both")

lbl3 = Label (root, text = "Enter value between 1 to 254", font = ("Arial",12,"bold"),fg = "red")
lbl3.pack(expand = True, fill = "both")

area = Entry (root)
area.pack()

btn3 = Button (root, text = "Ok",bd = 3, font = ("Vardana"), bg = "#4afae5", command=Control)
btn3.pack(pady = "20")




root.mainloop()