NEW: Home Assistant integration. Simply plug this in and point at an MQTT server which is consumed by HA, and the sensor will automatically show up in the UI!
It monitors washing machines using an accelerometer with an analog output - primarily the spinning cycles as those generate the largest amount of vibrations.
Say you have a laundry room in the basement and want to be notified when the washing cycle has completed. This project is a good start.
This project is in the public domain.