How Much Physical Access and Contact Do You Need to Make This Work?

You have to make firmware for each device, which means you have some little widget out there cranking its little heart out. And even having multiple keys across different devices is a, i mean, that's a manufacturing nightmare. How much physical access and contact do you need to make this work? Do you have to physically attach to the e m c u, yes, sothe, the best way. You know, it's theoretically possible to do some of the stuff, even remotely.