Arduino python GUI led control

Hello Friends,

In this project, we are interfacing arduino with python. Arduino can be easily interfaced with python using serial communication (uart) via pyserial library. For GUI on python, we are using tkinter.

Let's start with the python script:
Libraries required: pyserial

It can  be esaily installed by: pip install pyserial




Python script:

import serial as s
import time as t
from tkinter import *
from tkinter import messagebox


ser = s.Serial('COM3', 9600, timeout=0)   # check your com port
t.sleep(2)

def on():
    ser.write(b'7')

def off():
    ser.write(b'8')

def exit():
    ser.close() # close serial port
    quit()

window = Tk()
window.title("                  ARDUINO MEETS PYTHON")
window.geometry('640x480')
lbl = Label(window, text="Welcome to this project",fg='black',font=(None, 15))
lbl.place(relx=0.30, rely=0.10, height=50, width=250)
bo = Button(window, text="LED ON", width=10 ,bg='red' ,command=on)
bo.place(relx=0.34, rely=0.30, height=40, width=200)
cb = Button(window, text="LED OFF", width=10, bg='green' ,command=off)
cb.place(relx=0.34, rely=0.40, height=40, width=200)
ext = Button(window, text="Exit", width=10, bg='white', command=exit)
ext.place(relx=0.34, rely=0.50, height=40, width=200)
window.mainloop()

 Arduino code:

char a=0;
const int led=13;

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3f,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup() {
Serial.begin(9600);
pinMode(led,OUTPUT);
lcd.init();
lcd.backlight();
}

void loop() {
if(Serial.available()>0)
a=Serial.read();

lcd.setCursor(3,0);
lcd.print(a,DEC);

if(a=='7')
{
  digitalWrite(led,HIGH);
}
else
{
  digitalWrite(led,LOW);
}

}

////// code ends here

Note: LCD is optional

Python GUI

Video: