Continuous data streaming Arduino to Python -

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i trying python gui window using tkinter continuously display data streaming arduino uno board acting voltmeter. code i've got, window display 1 data point, , once window gets closed, new window opens next available data point. here's code i've been using:

import serial tkinter import * ser = serial.serial('/dev/tty.usbmodem621') ser.baudrate = 9600 while 1 == 1:     reading = ser.readline()     root = tk()     w = label(root, text = reading)     w.pack()     root.mainloop()

i'm using macbook pro, , pyserial package serial communications. how window refresh itself?

i think problem you're creating new root every loop iteration. try code:

import serial tkinter import * time import sleep ser = serial.serial('/dev/tty.usbmodem621') ser.baudrate = 9600  def update():     while 1:         reading.set(ser.readline())         root.update()         sleep(1)  root=tk() reading = stringvar()  w = label(root, textvariable = reading) w.pack()  root.after(1,update)     root.mainloop()

this sets "mainloop" call "update" function after millisecond , uses reference variable "reading" rather actual value of it, allowing updated.

i hope helps.


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