TrigBoardLightDetec
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This is a cool project you can build with the trigBoard. Basically just an IoT water level detector. If there's a leak, flood, or even if it rains, get a push notification immediately!! Best part is that the trigBoard uses such little current, that the battery will last for a very long time.
Here's the diagram for hooking up the probe:
NOTE! I noticed when hooking up the wire to ground as shown in the video that the range was severely reduced. I tried connecting it like it is here in the diagram and get much better performance
Make sure to set the jumpers properly, so you wake the board up when water is detected: