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Identify the error in this code snippet for writing to an I2C device:

medium📝 Debug Q6 of 15
Raspberry Pi - I2C Communication
Identify the error in this code snippet for writing to an I2C device:
from smbus2 import SMBus
bus = SMBus(1)
bus.write_byte_data(0x30, 0x01)
AMissing the value byte to write
BIncorrect device address format
CSMBus not imported correctly
DBus number should be 0
Step-by-Step Solution
Solution:
  1. Step 1: Check write_byte_data parameters

    The method requires three parameters: device address, register, and value to write.
  2. Step 2: Identify missing argument

    The code only provides device address and register, missing the value byte.
  3. Final Answer:

    Missing the value byte to write -> Option A
  4. Quick Check:

    write_byte_data needs 3 args; value missing [OK]
Quick Trick: write_byte_data needs address, register, and value [OK]
Common Mistakes:
MISTAKES
  • Omitting value argument
  • Wrong bus number assumption
  • Incorrect import statements

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