Autonomous, time-based, low power still camera.
The first instance of this camera in action: https://wwv-schwarzwald.de/die-murg/cam
This repo documents Hard- and Software for a very low-power, battery/solar powered camera with GSM/LTE connectivity. It is designed to operate unattended for months in an off-grid environment. It will upload images to a server on a time-based trigger.
The intended use-case is to monitor river-waterlevels for whitewater paddlers. The advantage of a camera over other gauging techniques is, only line-of sight is needed, no access to the Water. Being diectly at the water brings legal and mechanical challenginges that are not at play using a camera.
Full discussion of the original design decisions here: https://elktown-labs.com/autonomouscam/
The repo just transferred from non-public to public, we try to add more documentation. Currently, work is going on for a new hardware revision with a few improvements, most notably upgrading to a LTE capable Modem.
If you are interested in building / operating such a camera or want to contribute to it's development, feel free to open an issue.