UART got to be kidding me
UART is a serial protocol that most embedded devices use. The previous device used UART that talked to a special USB chip (16u2 I believe) that was programmed to do essentially serial over USB by way of HID packets.
However, the HID is not necessary - one can talk to a BitLox using straight serial 57600-8-N-1. You have to talk HEX to it; that's what it understands.
So we can talk to the device - via USB built-in it seems. We'll stub this out and it WILL be functional, but we will not include USB on the final product. I'll put POGO pins on the board in case someone is determined enough that they really want USB or something.
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So now I can yell at the device - why won't it respond? I can send a byte - but one a second byte is sent, total lockup. I know it CAN send a response, as I tested the spewUART() function and it appropriately spews 0xDEADBEEF.