My wife told me a few weeks ago, that our new washing machine ends the washingprocess earlier than it predicts in the display. This is how I came to the idea to use homeautomation to send a message to her cellphone when washing machine or tumbler is finished.
The mysensor sketch is a motion sensor, that is tripped when tumbler or washing machine is running. In vera I use VeraAlerts to send a Pushbullet message to my wifes cellphone when the washing machine or tumbler is not tripped anymore.
Our bosch washing machine and our bosch tumbler have a status led that is off, when the device is off. When the device is on but not running it blinks and when it is washing or drying the status led is permanently on.
I use a photoresistor to read if the led is on or off. when it is on for 10 readings I know that the device is running and send this to vera.
All 3D-Printed components I share on youmagine.com (see BOM).