Washing machine ended beep detection?

[Seaside]

I would still suggest you do this with a power plug, zigbee, zwave or similar.
I have an add-on that makes this easier, it also possible to do the logic.yourself in rules.

State O-Matic Binding - Monitor your Washingmachine / Dishwasher / Electric Car Etc

State O-Matic Binding The State O-Matic Binding will enable you to monitor electrical devices such as washing machine, dryer, dishwasher, electrical car charging and so on. The component is generic and any type of equipment can be monitored as long as it is possible to read its power consumption. Examples of usage: Monitor your electric car when it is charging. Once the charging is done, you will get notified about the cost, consumption and time it took. Monitor your dishwasher, dryer or …