tkinter-led-control.py

import tkinter as tk   #for installing tkinter module: pip3 install tkinter
import tkinter.font as tkFont
import RPi.GPIO as GPIO #import GPIO pins

led=12 #led pin (board number)
GPIO.setmode(GPIO.BOARD) #select board mode
GPIO.setup(led,GPIO.OUT) #led pin as output

pwm=GPIO.PWM(led,50) #50hz pwm
pwm.start(0)
pwm.ChangeDutyCycle(0) #start as led OFF
pwm_data=100

def button_on_command(): #when we press ON button this function is running
    pwm.ChangeDutyCycle(pwm_data) #write pwm data to led pin
    print("[Led ON]")


def button_off_command(): #when we press OFF button this function is running
    pwm.ChangeDutyCycle(0) #write pwm data to led pin
    print("[Led OFF]")

def button_pwm_command():#when we press SAVE button this function is running
    global pwm_data
    pwm_data=slider.get() #get slider's value
    print("[PWM Data Saved...]")


root = tk.Tk() #our main frame called as "root"
root.title("Panel") #window name

bg=tk.PhotoImage(file="images.png") #backgorund image
labelbg=tk.Label(root,image=bg)
labelbg.place(x=0,y=0)

#setting window size
width=180
height=180
screenwidth = root.winfo_screenwidth()
screenheight = root.winfo_screenheight()
alignstr = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2)
root.geometry(alignstr)
root.resizable(width=False, height=False)

#setting slider
slider=tk.Scale(root,from_=0, to=100) 
slider["bg"] = "#ff7f00" #slider color
slider.pack()
slider.place(x=10,y=10,width=50,height=160)
slider.set(100) #first value is 100

#setting ON button
button_on=tk.Button(root)
button_on["bg"] = "#76ff0d"
ft = tkFont.Font(family='Times',size=18)
button_on["font"] = ft
button_on["fg"] = "#000000"
button_on["justify"] = "center"
button_on["text"] = "ON"
button_on["relief"] = "groove"
button_on.place(x=70,y=10,width=100,height=30)
button_on["command"] = button_on_command

#setting SAVE button
button_pwm=tk.Button(root)
button_pwm["bg"] = "#ffff00"
ft = tkFont.Font(family='Times',size=18)
button_pwm["font"] = ft
button_pwm["fg"] = "#000000"
button_pwm["justify"] = "center"
button_pwm["text"] = "SAVE"
button_pwm["relief"] = "groove"
button_pwm.place(x=70,y=75,width=100,height=30)
button_pwm["command"] = button_pwm_command

#setting OFF button
button_off=tk.Button(root)
button_off["bg"] = "#f25858"
ft = tkFont.Font(family='Times',size=18)
button_off["font"] = ft
button_off["fg"] = "#000000"
button_off["justify"] = "center"
button_off["text"] = "OFF"
button_off["relief"] = "groove"
button_off.place(x=70,y=140,width=100,height=30)
button_off["command"] = button_off_command

#which command runs and update window
root.mainloop()