Displaying sensor readings on OLED in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the library needed to control the OLED display.

Raspberry Pi

import [1]

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

Aboard

Btime

Cadafruit_ssd1306

Drandom

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'board' instead of the OLED library.

Importing 'time' or 'random' which are unrelated here.

The adafruit_ssd1306 library is used to control the OLED display on Raspberry Pi.

2fill in blank

medium

Complete the code to initialize the I2C interface for the OLED display.

Raspberry Pi

i2c = [1]()

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ASPI

BI2C

CUART

DGPIO

Attempts:

3 left

💡 Hint

Common Mistakes

Using SPI or UART which are different communication protocols.

Using GPIO which is general purpose pins, not a bus.

The OLED display uses the I2C communication protocol, so we initialize it with I2C().

3fill in blank

hard

Fix the error in the code to create the OLED display object with correct width and height.

Raspberry Pi

display = adafruit_ssd1306.SSD1306_I2C([1], 64, i2c)

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A128

B32

C16

D256

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping width and height values.

Using incorrect pixel dimensions.

The OLED display used here has a width of 128 pixels and a height of 64 pixels. The first argument is the width, so it should be 128. The code has 64 as the second argument (height), so the first argument must be 128.

4fill in blank

hard

Fill both blanks to clear the display and then show the new content.

Raspberry Pi

display.[1]()
display.[2]()

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Afill

Bshow

Cclear

Dupdate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'clear' instead of 'fill' to empty the display.

Using 'update' instead of 'show' to refresh the display.

To clear the display, we use fill(). To update the display with new content, we use show().

5fill in blank

hard

Fill both blanks to create a dictionary comprehension that stores sensor readings greater than 50.

Raspberry Pi

filtered_readings = {sensor: value for sensor, value in readings.items() if value {BLANK_1}} {{BLANK_2}}
print(filtered_readings)

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A>

B50

C)

D]

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' in the condition.

Forgetting to close the print statement with a parenthesis.

The dictionary comprehension filters readings where the value is greater than 50. The print statement ends with a closing parenthesis ).