So I built a board tonight, and its working (after removing and rotating one of the h-bridge chips I put on backwards). I've validated that micropython works on it, and I can turn on and off the four LEDs. I've also successfully paired my cell phone with the bluetooth module on the board, so I'm pretty happy about that.
Tomorrow I'll test more of the functionality, making sure that everything works.
|NanoSeeker v2.1 PCB Populated|
Here's a picture of the entire sub, with the PCB attached.
The hole in the top of the nosecone is where the pressure/depth sensor will go.