smbus2 library for I2C in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the smbus2 library.

Raspberry Pi

from smbus2 import [1]

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

ADevice

BI2C

CBus

DSMBus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'I2C' instead of 'SMBus' as the import.

Trying to import 'Bus' which does not exist in smbus2.

The SMBus class is imported from the smbus2 library to communicate over I2C.

2fill in blank

medium

Complete the code to create an SMBus object for I2C bus number 1.

Raspberry Pi

bus = [1](1)

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ASMBus

BI2CBus

CBus

DDevice

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'I2CBus' which is not part of smbus2.

Using 'Bus' which is undefined.

The SMBus(1) creates an object for I2C bus number 1 on Raspberry Pi.

3fill in blank

hard

Fix the error in the code to write a byte value 0x10 to device address 0x20 at register 0x01.

Raspberry Pi

bus.write_byte_data([1], 0x01, 0x10)

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A0x10

B0x01

C0x20

D0x00

Attempts:

3 left

💡 Hint

Common Mistakes

Using the register or value as the device address.

Using 0x00 which is usually not the device address.

The first argument to write_byte_data is the device address, which is 0x20 here.

4fill in blank

hard

Fill both blanks to read a byte from register 0x05 of device address 0x30.

Raspberry Pi

data = bus.[1]([2], 0x05)

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Aread_byte_data

B0x30

C0x20

Dwrite_byte_data

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'write_byte_data' instead of 'read_byte_data'.

Using wrong device address like 0x20.

Use read_byte_data method with device address 0x30 to read from register 0x05.

5fill in blank

hard

Fill all three blanks to write a block of data [0x01, 0x02, 0x03] to register 0x10 of device address 0x40.

Raspberry Pi

bus.[1]([2], 0x10, [3])

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Awrite_i2c_block_data

B0x40

C[0x01, 0x02, 0x03]

Dread_i2c_block_data

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read_i2c_block_data' instead of write.

Using wrong device address or data format.

Use write_i2c_block_data with device address 0x40 and the data list to write multiple bytes to register 0x10.