: Ensure the RS232/USB-to-Serial driver (e.g., CP210x, CH340, or PL2303) is correctly installed on your PC.
stands for Set-Top Box. This is a direct instruction to the user/technician: verify the UART (Universal Asynchronous Receiver-Transmitter) connection. Specifically, check if the device is receiving data from the PC’s serial terminal. : Ensure the RS232/USB-to-Serial driver (e