Hi.
I have the XGS1010-12 switch (looks identical to XGS1210 but officially has no management support). Zyxel has no firmware to download for it. I opened it and it looks just like the 1210: (https://biot.com/switches/zyxel_xgs1210-12), with same 9302B chip and same RAM.
What is the easiest way to connect to the serial port? Do I need some special hardware? I have a USB->9pin serial adapter, and also an arduino if that is useful.
Can I dump out the current firmware via tftp from the bootloader? Can I test custom firmware by loading it directly to RAM and starting it from there (without touching the stock flash)?