Hi Tekkx, my DCS-BIOS experience has been more forgiving, it doesn't matter when I start socat, I can leave it running between sessions, restart it mid flight, it always reconnects with the sim. Also, though I have a 5V Reg, my entire right hand console doesn't and it's happily running a bunch nano's off the Mega's 5V regulator. So I'm wondering if it comes down to the quality of the Mega and the components within. It sounds like I may have been really lucky with DCS-BIOS, took less than 15 mins to first test master/slave (mega/nano). The issues that people are having must come down to the hardware or maybe electrical noise. A DSO would be useful.
cheers
John