Hi @HWguru, thanks a lot for your answer!
What is default settings ip address in the factory firmware? and in openwrt?
Is the factory setup.exe tool for first configuration and ip setting available anywhere to download?
I've been scanning several subnets with nmap, but I can't get it detected.
I'm sure I installed Tobias's openwrt in it at some point and it run for years, but I remember I also went back to the factory firmware a few times, to see if it had better smb performance. So not sure if it had factory fw or openwrt when I put it to rest.
I have tried swapping TX and RX cables, but with no success, I can't get it detected in putty.
I also tried with and without the 3,3V pin connected, and with and without a disk connected but I can't get it detected in the network, nor with putty, I guess I must be doing something wrong or there is some hardware fault.
Raidsonic IB-NAS-4220-B, currently bricked