Server Hardware for openplotter?

[glowntiger]

you ask for advise but then shoot down any that's given..i dont think your going to find anyone here to write free software so that you can sell hardware..
OP is open source so you can fork and modify it to your hearts content..
the reason most of us use OP in the first place is that its open source and parts are readily available and can be bought off the self..
another piece of hardware will just cause more problems in my opinion..

Hi Jim,
I don´t understand your Problem.  I do not ask for advise, I ask for opinions. I do not need advice for pcb design. But I think opinions are to discuss and to focus. Many peoples, many opinions…   
I do this also with other hardware environments… Regular I put the hardware and another do the software.  Also we develop own software Peaces for the hardware… As example here: https://github.com/Joey-1970/GeCoS-Modules or here: https://github.com/bgersmann/GeCoS-Server
By the way… I have taken your advise to remove the RTC....   
It´s not so easy to do this open source. Yes, I want to sell the pcb´s later. I must do test with it to conform. 
That´s the greatest coast factor and without it´s not allowed to sell them. If anybody interested he can mail me and I send the grip files. Thats no problem… But I think the most people don´t want to mount the pcb by his own...   And believe me: If I sell them for 60€ I earn nothing. That´s more a hobby…

"parts are readily available and can be bought off the self" where you found them? I know only the USB adapters…. My opinion (I know other peoples see it differently) USB is for a office, not for a marine application…    I want one board with all interfaces.