Tkinter GUI for sensor dashboard in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create the main window for the sensor dashboard.

Raspberry Pi

import tkinter as tk

root = tk.[1]()
root.title("Sensor Dashboard")
root.geometry("400x300")
root.mainloop()

Drag options to blanks, or click blank then click option'

AWindow

BCanvas

CFrame

DTk

Attempts:

3 left

💡 Hint

Common Mistakes

Using tk.Window() instead of tk.Tk()

Trying to create a Frame as the main window

Using tk.Canvas() as the main window

The main window in Tkinter is created using tk.Tk(). This initializes the root window where all widgets will be placed.

2fill in blank

medium

Complete the code to add a label widget that shows the sensor name.

Raspberry Pi

label = tk.Label(root, text=[1], font=("Arial", 16))
label.pack(pady=10)

Drag options to blanks, or click blank then click option'

ATemperature Sensor

Blabel_text

C"Temperature Sensor"

Dsensor_name

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the text string

Passing a variable name without defining it

Using single quotes inconsistently

The text parameter requires a string, so it must be enclosed in quotes. Here, we use "Temperature Sensor" to display the label text.

3fill in blank

hard

Fix the error in the code to update the sensor value label dynamically.

Raspberry Pi

def update_value():
    sensor_value = 25  # example sensor reading
    value_label.[1](text=f"Value: {sensor_value} °C")

value_label = tk.Label(root, text="Value: -- °C", font=("Arial", 14))
value_label.pack()

root.after(1000, update_value)

Drag options to blanks, or click blank then click option'

Aconfig

Bconfigure

Cupdate_text

Dset_text

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like update_text or set_text

Using config instead of configure (both work but configure is preferred here)

Trying to assign text directly

To change the text of a Tkinter Label, use the configure method. It updates widget options dynamically.

4fill in blank

hard

Fill both blanks to create a button that starts sensor data updates and packs it with padding.

Raspberry Pi

start_button = tk.Button(root, text=[1], command=[2])
start_button.pack(pady=20)

Drag options to blanks, or click blank then click option'

A"Start"

Bupdate_value

C"Stop"

Droot.quit

Attempts:

3 left

💡 Hint

Common Mistakes

Using function call with parentheses in command

Not using quotes around the button text

Using wrong function names

The button text should be a string like "Start". The command should be the function update_value to start updating sensor data.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps sensor names to their latest values if the value is above 20.

Raspberry Pi

sensor_data = { [1]: [2] for [1], [2] in [3] if [2] > 20 }

Drag options to blanks, or click blank then click option'

Asensor

Bvalue

Csensors.items()

Dsensor_value

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names

Not unpacking items() correctly

Using sensor_value instead of value

This dictionary comprehension loops over sensors.items(), unpacking each sensor and its value. It includes only those with values above 20.