Multiple I2C devices on same bus in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the SMBus module needed to communicate with I2C devices.

Raspberry Pi

from smbus2 import [1]

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

ABus

BI2C

CDevice

DSMBus

Attempts:

3 left

💡 Hint

Common Mistakes

Importing a wrong class like I2C or Bus instead of SMBus.

You need to import SMBus from smbus2 to work with I2C devices on Raspberry Pi.

2fill in blank

medium

Complete the code to open I2C bus number 1 on Raspberry Pi.

Raspberry Pi

bus = SMBus([1])

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A0

B1

C2

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using bus 0 or 2 which may not be enabled or available.

On Raspberry Pi, I2C bus 1 is the default bus used for connecting devices.

3fill in blank

hard

Fix the error in the code to read a byte from the device at address 0x40.

Raspberry Pi

data = bus.read_byte([1])

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

A0x40

B0x04

C40

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect values like 40 (0x28 hex) or 0x04 which point to different devices.

The device address is 0x40 in hexadecimal to read from the correct device. (Note: decimal 64 is equivalent.)

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps device addresses to their read byte values.

Raspberry Pi

device_data = {addr: bus.read_byte(addr) for addr in [1] if addr [2] 0x00}

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A[0x20, 0x40, 0x60]

B[0x10, 0x30, 0x50]

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong address lists or incorrect comparison operators like '>=' which includes 0x00.

The addresses list includes common I2C device addresses. The condition filters addresses greater than 0x00.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that stores device addresses as keys, their read byte values as values, and only includes devices with values less than 100.

Raspberry Pi

filtered_data = { [1] : bus.read_byte([2]) for [3] in [0x20, 0x40, 0x60] if bus.read_byte(_) < 100 }

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

Aaddr

Bdevice

C_

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently or not matching the loop variable in the condition.

The variable _ is used as key and argument for read_byte. The loop variable is _ to match the condition.