esp32 smart alarm clock

This project is just for fun, using an esp32 as an alarm clock that has a built-in web server for setting up alarms, etc.

Some plans, very tentative:

• Hardware:
  • esp32
  • SD card and adapter for storing sound files, web server files, alarm database, etc.
  • Alarm clock style segmented led display
  • photodiode for auto-brightness
  • button array for doing memory game to wake up instead of snoozing (or option for both)
  • vibration motors for extra annoyance
  • wake up lights (that get brighter closer to wake up time?)
  • 3D printed chassis (although I don't have a 3D printer lol)
• Software:
  • esp32 software:

    • Store alarms and their info in a database file (using this maybe?)

      Alarm Name (text) | Time (text) | Days of the week (int, byte) | vibration (bool) | snooze (int, duration) | memory game (int, difficulty) | wake up light (int, minutes before) | sound file (text, either local file or url) | enabled (bool) | delete after (bool) --- | --- | --- | --- | --- | --- | --- | --- Alarm 1 | HH:MM | 0b01001011 | true | 0 | 3 | 5 | https://www.youtube.com/watch?v=dQw4w9WgXcQ | true | false

    • Every minute check if an alarm should be played, or any of the other shenanigans

    • Days of the week: each bit of the byte is a day of the week, the 8th byte indicates that it should be run one time

    • Snooze: just make a new alarm with the same parameters at [snooze] minutes later, but the delete option as true

    • Memory game: like a simon says kind of memory game, just to get the brain flowing a little bit in the morning

    • Wake up light: check cur_time > alarm_time - memory_light_minutes to see if wake up light should go on, maybe make it smarter and fade on or something

  • Web gui:

    • Show current alarm clock time at the top of the web page

    • Could add in a "next alarm in x hours and x minutes"

    • Have general settings like volume, brightness (auto, set, light off),

    • Load alarms from the database

    • Each alarm entry:

      1 [Alarm 1] [7:00] [AM/PM v] Repeat [Never/(Days) v] Vibration [x] Snooze [ ] Memory Game [Off/Easy/Medium/Hard v] Light [0/5/10/15/20/25/30 v] mins before Sound ['some/filepath/dropdown' v] Enabled [x] Delete (x)

    • Any change should update the database via post request

    • Button to add new alarms [+]

  • Could be fun to try something like a sleep playlist, where the alarm clock will stream a song or playlist for x minutes or something, then automatically turn off

Note: For compiling, I'm using ESP32 Dev Module and Partition Scheme: "Huge APP (3MB no OTA/1MB SPIFFS):". This is to increase program space, and since I'm not using OTA or SPIFFS it's a better choice for this project. May want to look into increasing flash size? It looks like it can go up to 16MB, but I don't know what the tradeoffs for that are. Currently running 4MB.