[Solved] Identify the error in the following code snippet that writes to an I2C device and suggest the fix: from smbus2 import SMBus bus = SMBus(1) bus.write_byte_data(0x40, 0x02) bus.close() | Raspberry Pi

Raspberry Pi - I2C Communication

Identify the error in the following code snippet that writes to an I2C device and suggest the fix:

from smbus2 import SMBus
bus = SMBus(1)
bus.write_byte_data(0x40, 0x02)
bus.close()

AWrong device address format; use string instead of integer

BMissing the data byte argument in write_byte_data; add the data byte

CIncorrect bus number; change SMBus(1) to SMBus(0)

Dbus.close() should be called before write_byte_data

Step-by-Step Solution

Solution:

Step 1: Check write_byte_data parameters
The function requires three arguments: device address, register, and data byte.
Step 2: Identify missing argument
The code only passes two arguments, missing the data byte to write.
Final Answer:
Missing the data byte argument in write_byte_data; add the data byte -> Option B
Quick Check:
write_byte_data needs 3 args [OK]

Quick Trick: write_byte_data always needs 3 arguments [OK]

Common Mistakes:

MISTAKES

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Identify the error in the following code snippet that writes to an I2C device and suggest the fix: