[Solved] What will be the output of this code snippet?from smbus2 import SMBus with SMBus(1) as bus: bus.write_byte_data(0x30, 0x05, 0xFF) result = bus.... | Raspberry Pi

Raspberry Pi - I2C Communication

What will be the output of this code snippet?

from smbus2 import SMBus
with SMBus(1) as bus:
    bus.write_byte_data(0x30, 0x05, 0xFF)
    result = bus.read_byte_data(0x30, 0x05)
    print(result)

Assuming the device echoes back the written byte.

A5

B0xFF

C255

DError: Write failed

Step-by-Step Solution

Solution:

Step 1: Write byte 0xFF to register 0x05
The code writes the byte 0xFF (decimal 255) to the device register.
Step 2: Read back the byte from the same register
The device echoes back 0xFF, which is 255 in decimal, printed as integer.
Final Answer:
255 -> Option C
Quick Check:
Write then read byte returns decimal 255 [OK]

Quick Trick: Hex 0xFF equals decimal 255 when printed as int [OK]

Common Mistakes:

MISTAKES

Expecting hex string output instead of int
Confusing register address with data
Assuming write_byte_data returns a value

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What will be the output of this code snippet?

Step 1: Write byte 0xFF to register 0x05

Step 2: Read back the byte from the same register

Final Answer:

Quick Check:

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