OP here: We recently released a software package that lets a boat owner monitor their vessel without any proprietary hardware. It's open source (https://github.

OP here: We recently released a software package that lets a boat owner monitor their vessel without any proprietary hardware. It's open source (https://github.com/floathub/sfh https://github.com/floathub/sfh), and the above linked article is essentially a walkthrough of how to get it working on a Raspberry Pi. Thought it might be of interest here, please let us know if any questions.