I am working on creating a open source underwater water datalogger for a citizens sience project (project baseline). The sensors are supposed to be deployed by divers and should be replaced regulary to get to the data and provide fresh batteries.
We have managed to get the basic logger to work (just temperature logging on SD cards), but we would like to measure visibility as well. Unfortunately all involved persons don’t know how to design this sensor.
Idealy, we could talk via I2C with the sensor and get a number from it. Since the sensor will be deployed at depth with varying amount of light (light from the surface), we need to compensate for it.
I have seen some really nice ideas - just we cannot get them to work.
Maybe someone here knows how to create this sensor…