[Tkinter] Tkinter widgets driving Arduino uno output pins

[woodcncwnc]

After several weeks of reading web pages and books, I have the Python / Arduino serial interface working. It was all easy until I tried to get actual (live) status of Arduino digital outputs. It was finally solved using the “.set()” function, which was suggested by “Don Rozenberg the author of PAGE - Python Automatic GUI Generator". Thanks to all for the feedback I received. I have attached the Python and Arduino scripts.

Python ver 37-32, tkinter. TkVersion 8.6

#! /usr/bin/env python
# Arduino_Driver.py

import serial
import time
from tkinter import *

ArduinoSerial = serial.Serial('COM4', 9600, timeout=.1) # open serial port
time.sleep(2)

def led_on():
    ArduinoSerial.write(b'1') # set Arduino output pin 13 high
    var1.set(ArduinoSerial.readline().decode('utf-8').strip())# get Arduino output pin 13 status
    if var1.get() == '1':
        var1.set('Pin 13 is ON')

def led_off():
    ArduinoSerial.write(b'0') # set Arduino output pin 13 low
    var1.set(ArduinoSerial.readline().decode('utf-8').strip()) # get Arduino output pin 13 status
    if var1.get() == '0':
        var1.set('Pin 13 is OFF')

def led_Exit():
    ArduinoSerial.write(b'0') # set Arduino output pin 13 low and quit
    ArduinoSerial.close() # close serial port
    quit()

root = Tk()

font1 = "-family {Courier New} -size 10 -weight bold -slant roman -underline 0 -overstrike 0"
font2 = "-family {Segoe UI} -size 12 -weight bold -slant roman -underline 0 -overstrike 0"
font3 = "-family {@Arial Unicode MS} -size 12 -weight bold -slant roman -underline 1 -overstrike 0"
font4 = "-family {Segoe UI} -size 10 -weight bold -slant roman -underline 0 -overstrike 0"

var1 = StringVar()
var1.set('OFF')
root.geometry("430x200+600+200")
root.title("                                         Arduino Output Control")
root.configure(background="#d9d9d9")


btn1 = Button(root, text='Press for Led ON', font = font1, bg = 'light green', highlightbackground= 'black',   \
        borderwidth = 3, activebackground = 'light gray', relief=RAISED, command=led_on) # activate Arduino pin 13
btn1.place(relx=0.34, rely=0.10, height=30, width=150)

btn2 = Button(root, text='Press for Led OFF', font = font1, bg = 'red2', fg = 'white', highlightbackground= 'black',   \
        borderwidth = 3, activebackground = 'light gray', relief=RAISED, command=led_off) # deactivate Arduino pin 13
btn2.place(relx=0.34, rely=0.30, height=30, width=150)

btn3 = Button(root, text='Press to Exit', font = font3, bg = 'maroon1', highlightbackground= 'black',   \
        borderwidth = 3, activebackground = 'gray', relief=RAISED,command=led_Exit) # close serial port and quit program
btn3.place(relx=0.34, rely=0.50, height=30, width=150)

lbl1 = Label (root, textvariable = var1, font = font2, bg = 'light blue', fg = 'black', highlightbackground= 'black',   \
        borderwidth = 3, relief=RAISED) # message label for status of arduino pin 13
lbl1.place(relx=0.34, rely=0.70, height=30, width=150)

root.mainloop()

Arduino ver 1.8.5, Arduino UNO

int data;

void setup() 
{ 
  Serial.begin(9600); //initialize serial COM at 9600 baudrate
  pinMode(13, OUTPUT); //make the LED pin (13) as output
  digitalWrite (13, LOW);
} 
void loop() 
{
  if (Serial.available()> 0)
  {
    data = Serial.read();
  }
   if (data == '1')
    {
    digitalWrite (13, HIGH); 
    Serial.println(digitalRead(13));
    data = '2';
    }
   else if (data == '0')
    {
    digitalWrite (13, LOW);
    Serial.println(digitalRead(13));
    data = '2';
    }
}