One of my roommates meditates for a cumulative time of 2-3 hours a day. Being the talkative person that I am, I would disturb her often; always unsure if she was in the zone. To give her some peace, I plan to insert a pressure sensor in/under her meditation mat which will send a signal online where I can check if she’s free or not. Another output could be a WIFI compatible light on her door which would light up whenever she's meditating.