[Solved] Find the mistake in this Raspberry Pi I2C setup code: import smbus bus = smbus.SMBus(0) address = 0x40 bus.write_byte(address, 100) | Raspberry Pi

Raspberry Pi - I2C Communication

Find the mistake in this Raspberry Pi I2C setup code:

import smbus
bus = smbus.SMBus(0)
address = 0x40
bus.write_byte(address, 100)

Awrite_byte() requires two addresses

BSMBus(0) should be SMBus(1) on newer Raspberry Pi models

CAddress 0x40 is invalid for I2C devices

DMissing import for GPIO

Step-by-Step Solution

Solution:

Step 1: Check bus number for Raspberry Pi
Newer Raspberry Pi models use bus 1, not 0.
Step 2: Confirm correct bus usage
Using SMBus(0) may cause communication failure.
Final Answer:
SMBus(0) should be SMBus(1) on newer Raspberry Pi models -> Option B
Quick Check:
Use SMBus(1) on modern Pi [OK]

Quick Trick: Use SMBus(1) for I2C on Raspberry Pi 3 and later [OK]

Common Mistakes:

MISTAKES

Master "I2C Communication" in Raspberry Pi

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