CodeCell - Going to Sleep

CodeCell supports low-power sleep with timer or sensor wakeups. Sleep current differs by board, so pick the right mode for your use case.

Sleep Current by Board

All official sleep examples are in the repo: examples/Sleep

Sleep Examples (Quick Navigator)

• 1) Tap Interrupt Wakeup — C6 / C6 Drive
  Sleep on command, wake on a tap from the BNO085. On wake, show a brief LED indication.
  tap_interrupt_wakeup.ino · Est. sleep ≈ 200 µA (C6)

• 2) Brightness Interrupt Wakeup — C6 / C6 Drive
  Wake when light rises above a threshold. Triggers alarm (LED red + DriveCell tone) until silenced.
  brightness_interrupt_wakeup.ino · Est. sleep ≈ 280 µA (C6)

• 3) Proximity + Timer + EEPROM Wakeup — C3 / C3 Light / C6 / C6 Drive
  Save a proximity baseline to EEPROM, enter timed sleep, and re-check on wake. Alarm when delta exceeds range.
  proximity_timer_eep_wakeup.ino · Est. sleep ≈ 40 µA (C6) · 476 µA (C3 Light) · 861 µA (C3)

• 4) Darkness Interrupt Wakeup — C6 / C6 Drive
  Wake when light falls below a threshold (dark event). Triggers alarm until user disables.
  darkness_interrupt_wakeup.ino · Est. sleep ≈ 280 µA (C6)

• 5) Motion (RTC Timer Poll) Wakeup — C3 / C3 Light / C6 / C6 Drive
  Use RTC timer to wake periodically, sample motion state, trigger alarm if movement detected; otherwise return to sleep.
  motion_timer_wakeup (folder) · Est. sleep ≈ 40 µA (C6) · 861 µA (C3)

• 6) Proximity Interrupt Wakeup — C6 / C6 Drive
  Wake when proximity crosses a threshold. Triggers alarm (LED red + DriveCell tone) until silenced in the app.
  proximity_interrupt_wakeup.ino · Est. sleep ≈ 425 µA (C6)

Choosing a Strategy

• Lowest draw: Use timer sleep on C6/C6 Drive (~40 µA) and wake up every few seconds to poll sensors.
• Responsive UX: Use interrupt wake (tap / light / proximity) on C6 for instant triggers.

Explore these sketches here: CodeCell / examples / Sleep.