Timestamper

Quick Start

Timestamper

Fast setup and mode reference for the ATmega328PB cockpit timer firmware.

1. Controls

Controls are mode dependent, but in general:

  • Top button: press toggles backlight, long press stores a timestamp
  • Left button: press clear/reset/delete, long press delete all
  • Right button: press start/stop/confirm, long press GPS sync
  • Knob: rotate changes mode or value, press moves to next field, long press toggles edit mode
  • Any button acknowledges active timer alarm first

2. Mode Order

  1. UTC Only
  2. UTC / Local
  3. Timestamp Review
  4. Stopwatch
  5. Timer
  6. Desk Mode
  7. GPS Info

3. Backlight States

Normal
2026-06-16 12:34:56Z
SYNC NO       BAT:87

Blue is normal backlight, 30s timeout

Timestamp Feedback
>01 06-16 12:34:56L^
 02 06-16 12:21:03L

Green flash indicates timestamp confirm

Timer Alarm
FUEL TIMER       ALM
     + 00:00:12

Red flash indicates timer alarm, 5s timeout

4. Mode Screens

UTC Only
2026-06-16 12:34:56Z
SYNC OK  012s BAT:87

Left long press display firmware version; Right long press starts GPS sync

UTC / Local
 06-16 12:34:56 UTC
 06-16 05:34:56 -07

Knob long press enters UTC offset edit

Timestamp Review
>01 06-16 12:34:56L^
 02 06-16 12:21:03Lv

Right short toggles UTC/local; knob press toggles review flow

Stopwatch
STOPWATCH        RUN
     00:12:43.6

Right press starts/stops; left press resets

Timer
FUEL TIMER       RUN
     - 00:19:42

Right press starts/stops; knob long edits timer preset

Desk Mode
   TUE 2026-06-16   
      12:34:56

Left press change date format; knob press toggle Local/UTC; Right press toggle 12/24

GPS Info
ALT:02450FT GS:091KT
TRK:273 W   3D10 P15

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