Washer/Dryer notification

Atticus wrote 02/08/2022 at 01:04 1 point

getting tired of my roommates leaving their shit in the washer/dryer so I am thinking of a project to send a notification in the groupchat. main problem is how to know when it is done. 

current ideas: a plug that knows the electricity draw and when it is below a certain threshold it sends a notification, hacking the machine and intercepting the end signal wires, a microphone that checks for the specific frequency of the end signals

problems: products similar to plugwise are expensive, im renting so all splices must be reversible, audio filters aren't difficult but may have a highest chance of not working. 

I also saw a project here of someone using an accelerometer? not really sure how they did that as there was little explanation