Have been busy mulling over the various hardware elements and preparing to order parts.

After looking at a few related projects here (well-watcher) I've decided to try an ultrasonic rangefinder-type device to detect a rising water level.

I wanted to avoid any moving parts, which ruled out my original float-based idea.

I was thinking about using a pressure sensor, where the rising water in a 'vessel' would cause the air pressure to rise, but I was unsure how I would calibrate this..

Also switched to the APC220 radio module for better range.

Should be ordering parts this week!