https://padlet.com/elaine_tai_2/xbys1xfy38iq en-us 2015-12-20 06:49:04 UTC 2023-01-21 14:19:33 UTC hello@padlet.com elaine_tai_2 https://padlet.com/elaine_tai_2/xbys1xfy38iq/wish/87124148 Elaine Tai's IoT project on smoke /CO alarms lean business model

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