Advent of Cyber 4 - Day 19

Link: Advent Of Cyber 4 on TryHackMe

Question 1

What device can be used to probe the signals being sent on electrical wires between two devices?

Answer: Logic Analyser

Question 2

USART is faster than SPI for communication? (Yea,Nay)

Answer: Nay

Question 3

USART communication uses fewer wires than SPI? (Yea,Nay)

Answer: Yea

Question 4

USART is faster than I2C for communication? (Yea,Nay)

Answer: Nay

Question 5

I2C uses more wires than SPI for communication? (Yea,Nay)

Answer: Nay

Question 6

SPI is faster than I2C for communication? (Yea,Nay)

Answer: Yea

Question 7

What is the maximum number of devices that can be connected on a single pair of I2C lines?

Answer: 1008

Question 8

What is the new baud rate that is negotiated between the microprocessor and ESP32 chip?

Answer: 9600

Question 9

What is the flag that is transmitted once the new baud rate was accepted?

By analyzing Channel 1, we obtain the following baud rate:

By adding Channel 0, we get the response:

When switching the Async Serial Analyzer to 9600bd we get the following decoded message:

Answer: THM{Hacking.Hardware.Is.Fun}