Thanks for all of the updates - you did a great job adding detail, correcting errors, and just cleaning up the crude documentation - we will have to delve into this as it appears you have found some details on the wiring and interconnections that we were not aware of - many thanks.
I added another update (FWIW) with a few slides towards the end documenting a few other items and options:
slide 12 - Lumen Light connections.
slide 13 - OPTION - Use of an Ethernet Breakout / terminal strip to allow removal / replacement of penetrator from endcap without cutting wires. Many versions available on Amazon or Ebay for under $5.
slide 14 - OPTION - Adaptor for USB Connection Between Pixhawk and Pi - looks like this is not needed if connect GPIO rail to Telem port 2 as shown on your slide 2 works well. We found that Coms thru the USB port on side of Pixhawk was unreliable because the connector (even with a right-angle micro-USB)kept impacting the inside of the housing and getting bent. We changed the standoffs on the chassis for the pixhawk (from 25mm(~1-inch) to 7/8-inch) and this reduced the problem and made assy and disassy of the housing easier - less binding.
BTW, Has anyone seen documentation of the HW/SW/interconnection for the new BlueROV2?
Thanks for the inputs
bluerovforum-interconnectdiagram-with-options-added (6.56 MB)