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How do you correctly open a serial port at 115200 baud rate in Python on a Raspberry Pi?

easy📝 Syntax Q3 of 15
Raspberry Pi - Serial UART Communication
How do you correctly open a serial port at 115200 baud rate in Python on a Raspberry Pi?
Aser = serial.Serial('/dev/ttyS0')
Bser = serial.Serial(115200, '/dev/ttyS0')
Cser = serial.open('/dev/ttyS0', 115200)
Dser = serial.Serial('/dev/ttyS0', 115200)
Step-by-Step Solution
Solution:

  1. Step 1: Recall serial.Serial constructor syntax

    The constructor takes the port name first, then the baud rate as an integer.

  2. Step 2: Match correct syntax

    ser = serial.Serial('/dev/ttyS0', 115200) correctly uses serial.Serial('/dev/ttyS0', 115200).

  3. Final Answer:

    ser = serial.Serial('/dev/ttyS0', 115200) -> Option D

  4. Quick Check:

    Port first, baud rate second [OK]
Quick Trick: Port name first, baud rate second [OK]
Common Mistakes:
MISTAKES
  • Swapping baud rate and port arguments
  • Using serial.open instead of serial.Serial
  • Omitting baud rate parameter

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