There are a number of uses and projects such as
here for motion sensor or
here for a water sensor that use a gpio input on the Pi as the sensor input.
I have not been able to figure out how to Add & configure a gpio-based sensor like these on the newer PEP website. It was fairly obvious on the old PEP server from a few years ago.
Has anyone hard-wired wired a sensor directly to a gpio input on the pi and added it as a sensor from the PEP Dashboard & can tell us how to do it?
Thanks!