Part 2/3:
The speaker then proceeds to disassemble the device, carefully disconnecting the cables and exposing the board. As expected, they find the UART pins, including 3.3V, TX, RX, and ground. After verifying the voltages and ensuring the UART is active, the speaker decides to use an Arduino board as a serial-to-USB converter to connect to the device's console.
Exploring the Device's Firmware
Once connected, the speaker is able to access the device's console, but it doesn't appear to be a typical Linux-based system. Instead, they discover that the device is running an RTOS (Real-Time Operating System), likely Sonics, which is the board manufacturer.