layout title permalink sequence sub_system terminologies user_stories design Design /design 5 true term definition Bell or Doorbell Push button on-board the PCB or a physical button beside the door term definition Ding Dong Bell audio that is played when the door bell is pressed user actions host goal reason disable the ding dong sound within a configurable specified timeout (30s) I don't find it annoying to hear the same sound again and again while I get ready to open the door goal reason hear ding dong sound when the doorbell is pressed I can know that someone is waiting outside goal reason disable the ding dong sound during a configurable sleep hour (9pm to 9am) I don't want to be disturbed during my sleep hours goal reason see a WiFi notification to Zapier I can know that someone is waiting outside even if I am not at home goal reason work as a normal doorbell when the WiFi is down I can still know that someone is waiting outside user actions guest goal reason press the doorbell and hear the ding dong sound I can inform the hosts that I am waiting outside user actions maintainer goal reason charge the battery the doorbell can be used again for a longer time