Does anyone know of a device that will trigger when a light on an appliance comes on? My example here is a dehumidifier, when it needs to be emptied a little red LED turns on. I'm looking to convert that into an automation/alert in HE.
There is this:
Personally, I'd connect the float switch in the dehumidifier to a contact sensor, and get notified when the contact closes.
It could be a bit tricky but I will use optocoupler. Input (LED side) should be connected in series
with this Red LED (or in parallel but with a resistor) and Output (photo-transistor) connected
to the whatever contact sensor instead (or even in parallel) with reed switch (or Hall Sensor).
Probably not a solution for you, but my dehumidifier has the ability to bypass the bucket and attach a hose to the output. Then I place it on a counter that can drain into a sink.
Thanks for the ideas everyone
Don't forget a leak detector on the floor around it. And having the dehumidifier in a pan with a leak detector is a good 'belt & braces' idea. I live in a high-humidity area dehumidifier and/or condensate drains are a top-o-the-list problem for most of the year.