What is the best sensor that can tell when the washer or dryer have completed their cycle

[G+_Eddie Foy]

The induction is the isolation.  But do remember you can only put it on a single wire.  If you clamp it over both the hot and neutral wires it will cancel itself out.

[G+_Rud Dog]

Wayne Hobbins Nice job on the dog upper and lower limit. My dog has one pitfall she will bark ferociously when either the postman or a UPS truck comes by but it we are out walking her and the postman comes close she just ignores him. Territorial would have to say. Now if I can just her to "woof".

[G+_Rud Dog]

Thinking there is a market for a device which would sit between the power cord and the receptacle along with wifi capability able to run software for ITTT software. Would pay for such a device as in "take my money please"

[G+_Eddie Foy]

I dunno.  Its not that much effort to just walk over and check.

 

There are sure to be what you want in the industrial space, but gonna be expensive

[G+_Rud Dog]

Eddie Foy not so much but as you get older you forget even the basics. Crap half way out the door with no shoes on.

[G+_Rud Dog]

Wayne Hobbins Agreed and guessing the could bring the price down with a simple current/no current instead of actually tracking the wattage over time. Hell you can get boards with wifi on them for less then 30 bucks add the sensor and all you need (which I don't know how to do ) is add SW to talk with ITTT.

[G+_Eddie Foy]

Rud Dog  I live by Gracho Mark's view on age:  You are only as old as the women you feel.

[G+_Rud Dog]

Eddie Foy Lol....same only different.

[G+_Eddie Foy]

then you are doing it wrong :P

[G+_Philip de Vries]

Just thinking out loud but if there is a strong enough magnetic field being given off at the power cord you might be able to use a Hall effect sensor. You may still have to use one wire from the power cable though (I'm a bit rusty on the physics here). You're looking at a few bucks for the sensor and resistors (and that's in Canadian dollars). I don't know how sensitive you can get with the sensors but I'm pretty sure the 2mm neodymium cubes I use the sensors with are much stronger than the field given off by a washer or dryer power cable.

[G+_Rud Dog]

Philip de Vries Thank you for your response. Came across the Hall effect sensor you mention and thinking if they are inexpensive will order a couple and do some testing.

What I am coming to realize the hardware part will be somewhat simple compared to getting the wifi software side to send a message to my cell phone, once triggered. Did find a hint here.

 

Picked up the Particle Photon and connected to USB power and let the default firmware run. Now when ever my Internet service goes down I use ITTT like so:

If PARTICLE (changes state) then SMS my cell phone.

If I can figure out how this is done maybe I can apply it to the trigger on the absence or presence of current in the power line.

[G+_Rud Dog]

Well ordered me a handful of these puppies once they arrive gonna do some testing.

Original KY-003 Hall Magnetic Sensor Module