tkcmd.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
# move a servo from a Tk slider - scruss 2012-10-28
 
import pyfirmata
from tkinter import *
 
# don't forget to change the serial port to suit
board = pyfirmata.Arduino('COM8')
 
# start an iterator thread so
# serial buffer doesn't overflow
iter8 = pyfirmata.util.Iterator(board)
iter8.start()
 
# set up pin D9 as Servo Output
pin9 = board.get_pin('d:9:s')
 
def move_servo(a):
    pin9.write(a)
 
# set up GUI
root = Tk()
 
# draw a nice big slider for servo position
scale = Scale(root,
    command = move_servo,
    to = 175,
    orient = HORIZONTAL,
    length = 400,
    label = 'Angle')
scale.pack(anchor = CENTER)
 
# run Tk event loop
root.mainloop()