Hi

Not an issue with the project or the code but asking here anyway in case someone else wonders and can look up this ticket.

"Set the MCU to UART boot mode (pull TX pin low during boot)"

I am not familiar what it means to pull a pin low, I am using a USB to serial adapter and can read the boot process just fine with a speed of 115200, however to enter into "Set the MCU to UART boot mode" I need to pull the TX pin low, could someone explain how that is done?

Maybe it can't be performed with a regular cheap USB to Serial adapter?