I have a raspberry pi that runs node red and already does a bunch of other smarthome type stuff and its fairly close to the sump pump anyways so I bought a strap on float switch that I set just above where the sump pump normally turns on to let me know when it doesn't turn on. 2 low voltage wires from the sump to the pi. from there you can notify yourself using any number of infinite ways. I use the node red dashboard so I get a pop up on there. I get a text message on my phone via the email node. and I have 3 lg tv's which I can put a pop up on the tvs in the house using the LGtv node. the same setup monitors and or controls a bunch of other things like 2 garage doors, the heater in the garage, outdoor dusk to dawn lighting around the property, the doorbell, Not to mention all the applications for an indoor garden.